Peter Callen, MD
Professor Emeritus
Radiology
School of Medicine

Dr. Callen’s general research has been focused on discovering the sonographic signs that allow the sonographer to detect abnormalities and avoid false positive diagnosis of abnormalities in the obstetric, pediatric and adult patient. A specific area of interest has been in fetal dysmorphology and the detection of abnormalities involving the fetal, neural axis, thorax, skeletal system, genitourinary tract, gastrointestinal, and abnormalities of the placenta and umbilical cord.

Dr. Callen has published more than 200 peer-reviewed articles, and 65 book chapters. He is well known for his textbook, Ultrasonography in Obstetric and Gynecology, now in its fifth edition and considered the most extensively used book on obstetrical ultrasound worldwide.

Expertise: Ultrasound

Specialty: Obstetrical, gynecology, pediatric urology

Professional Interests: Obstetrical ultrasound, fetal dysmorphology, internet based learning, application of PACS systems to diagnostic ultrasound, perception of normal and abnormal findings at the time of ultrasound examination

Education and Training:

• Medical School: University of California, San Francisco School of Medicine
• Internship: University of California, San Francisco - Medicine
• Residency: University of California, San Francisco - Diagnostic Radiology
• Fellowship: University of California, San Francisco
• National Board of Medical Examiners
• California Medical License
• American Board of Radiology

• Magnetic resonance imaging and hysteroscopy to diagnose colo-uterine fistula: a rare complication of diverticulitis.
  The journal of obstetrics and gynaecology research 2008 Kassab A, El-Bialy G, Hashesh H, Callen P
• Columns of the fornix, not to be mistaken for the cavum septi pellucidi on prenatal sonography.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2008 Callen PW, Callen AL, Glenn OA, Toi A
• Fetal cerebellar hemorrhage in parvovirus-associated non-immune hydrops fetalis.
  The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians 2007 Glenn OA, Bianco K, Barkovich AJ, Callen PW, Parer JT
• Reliability of the lung-to-head ratio as a predictor of outcome in fetuses with isolated left congenital diaphragmatic hernia at gestation outside 24-26 weeks.
  American journal of obstetrics and gynecology 2007 Yang SH, Nobuhara KK, Keller RL, Ball RH, Goldstein RB, Feldstein VA, Callen PW, Filly RA, Farmer DL, Harrison MR, Lee H
• Unusual presentation of 22-kilogram retroperitoneal müllerian serous cystadenoma.
  Gynecologic oncology 2006 Kassab A, El-Bialy G, Clark J, Callen P, Powari M, Jones H
• Rapidly developing nephrocalcinosis in a patient with end-stage liver disease who received a domino liver transplant from a patient with known congenital oxalosis.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2005 Aziz S, Callen PW, Vincenti F, Hirose R
• Evaluation of femur length during the second and third trimesters in fetuses with myelomeningocele.
  Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology 2004 Williams G, Coakley FV, Qayyum S, Glenn OA, Breiman RS, Callen PW
• Intraventricular hemorrhage in term neonates caused by sinovenous thrombosis.
  Annals of neurology 2003 Wu YW, Hamrick SE, Miller SP, Haward MF, Lai MC, Callen PW, Barkovich AJ, Ferriero DM
• The lung-to-head ratio and fetoscopic temporary tracheal occlusion: prediction of survival in severe left congenital diaphragmatic hernia.
  Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology 2003 Keller RL, Glidden DV, Paek BW, Goldstein RB, Feldstein VA, Callen PW, Filly RA, Albanese CT
• Sonographic detection of gallbladder duplication: two cases discovered in utero.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2002 Kinoshita LL, Callen PW, Filly RA, Hill LM
• Sonographic evaluation of liver nodularity: Inspection of deep versus superficial surfaces of the liver.
  Journal of clinical ultrasound : JCU 2002 Filly RA, Reddy SG, Nalbandian AB, Lu Y, Callen PW
• Successful fetal intervention for congenital high airway obstruction syndrome.
  Fetal diagnosis and therapy 2002 Paek BW, Callen PW, Kitterman J, Feldstein VA, Farrell J, Harrison MR, Albanese CT
• Measurement of endometrial thickness at US in multicenter drug trials: value of central quality assurance reading.
  Radiology 2000 Bredella MA, Feldstein VA, Filly RA, Goldstein RB, Callen PW, Genant HK
• Prenatal sonographic findings in fetal cirrhosis secondary to hemochromatosis.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 2000 Skaife T, Callen PW, Coakley F
• Effect of ultrasound transducer frequency on the appearance of the fetal bowel.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1999 Vincoff NS, Callen PW, Smith-Bindman R, Goldstein RB
• Prenatal diagnosis of tuberous sclerosis in monozygotic twins with cardiac masses.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1999 Gushiken BJ, Callen PW, Silverman NH
• Chorioamniotic separation after second-trimester genetic amniocentesis: importance and frequency.
  Radiology 1998 Levine D, Callen PW, Pender SG, McArdle CR, Messina L, Shekhar A, Wong GP
• Systemic spread of meconium peritonitis.
  Pediatric radiology 1998 Patton WL, Lutz AM, Willmann JK, Callen P, Barkovich AJ, Gooding CA
• The effect of oligohydramnios on detection of fetal anomalies with sonography.
  AJR. American journal of roentgenology 1997 Levine D, Goldstein RB, Callen PW, Damato N, Kilpatrick S
• Evaluation of a sonographic PACS in clinical practice: analysis of technical and analytical time savings.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1996 Patel MD, Callen PW, Mar JB, Filly RA, Goldstein RB, Feldstein VA
• Dolichocephaly and oligohydramnios in preterm premature rupture of the membranes.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1996 Levine D, Kilpatrick S, Damato N, Callen PW
• Lateral ventricular effacement as an isolated sonographic finding in premature infants: prevalence and significance.
  AJR. American journal of roentgenology 1995 Patel MD, Cheng AG, Callen PW
• Imaging the fetal abdomen: how efficacious are the AIUM/ACR guidelines?
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1995 Levine D, Callen PW, Goldstein RB, Damato NM, Groffsky JL, Filly RA
• Sonographic detection of inferior vermian agenesis in Dandy-Walker malformations: prognostic implications.
  Radiology 1994 Chang MC, Russell SA, Callen PW, Filly RA, Goldstein RB
• Gastroschisis: can sonography of the fetal bowel accurately predict postnatal outcome?
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1994 Babcook CJ, Hedrick MH, Goldstein RB, Callen PW, Harrison MR, Adzick NS, Filly RA
• Prevalence of ventriculomegaly in association with myelomeningocele: correlation with gestational age and severity of posterior fossa deformity.
  Radiology 1994 Babcook CJ, Goldstein RB, Barth RA, Damato NM, Callen PW, Filly RA
• Growth retardation in prenatally diagnosed cases of gastroschisis.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1993 Fries MH, Filly RA, Callen PW, Goldstein RB, Goldberg JD, Golbus MS
• Sonographically detected testicular microlithiasis and testicular carcinoma.
  Journal of clinical ultrasound : JCU 1993 Patel MD, Olcott EW, Kerschmann RL, Callen PW, Gooding GA
• Alpha-fetoprotein screening programs: what every obstetric sonologist should know.
  Radiology 1993 Filly RA, Callen PW, Goldstein RB
• Elevated levels of amniotic fluid alpha-fetoprotein: sonographic evaluation.
  Radiology 1993 Robbin M, Filly RA, Fell S, Goldstein RB, Callen PW, Goldberg JD, Golbus MS
• The AIUM/ACR antepartum obstetrical sonographic guidelines: expectations for detection of anomalies.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1993 Nelson NL, Filly RA, Goldstein RB, Callen PW
• The role of velamentous cord insertion in the etiology of twin-twin transfusion syndrome.
  Obstetrics and gynecology 1993 Fries MH, Goldstein RB, Kilpatrick SJ, Golbus MS, Callen PW, Filly RA
• Color flow ultrasound for delineating microsurgical vessels: a clinical and experimental study.
  Annals of plastic surgery 1993 Amerhauser A, Moelleken BR, Mathes SJ, Gooding G, Goldstein R, Callen P, Filly RA
• Comparison of physical health benefits utilization. Mental and physical health claimants, 1989 and 1990.
  Journal of occupational medicine. : official publication of the Industrial Medical Association 1993 Harlow K, Johnson R, Callen P
• The lemon sign: not a specific indicator of meningomyelocele.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1993 Ball RH, Filly RA, Goldstein RB, Callen PW
• Frequency of fetal anomalies in sonographically detected polyhydramnios.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1993 Damato N, Filly RA, Goldstein RB, Callen PW, Goldberg J, Golbus M
• The choroid plexus pseudocyst: sonographic identification and characterization.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1992 Nelson NL, Callen PW, Filly RA
• Outcome of antenatally diagnosed cystic adenomatoid malformations.
  American journal of obstetrics and gynecology 1992 Kuller JA, Yankowitz J, Goldberg JD, Harrison MR, Adzick NS, Filly RA, Callen PW, Golbus MS
• The "lying down" adrenal sign: a sonographic indicator of renal agenesis or ectopia in fetuses and neonates.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1992 Hoffman CK, Filly RA, Callen PW
• Fetal ventricle: importance in routine obstetric sonography.
  Radiology 1991 Filly RA, Goldstein RB, Callen PW
• Ultrasound-guided aspiration of a neonatal brain abscess.
  Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery 1991 Obana WG, Cogen PH, Callen PW, Edwards MS
• Central nervous system damage and other anomalies in surviving fetus following second trimester antenatal death of co-twin. Report of four cases and literature review.
  Prenatal diagnosis 1990 Anderson RL, Golbus MS, Curry CJ, Callen PW, Hastrup WH
• Fetal intervention in obstructive uropathy: prognostic indicators and efficacy of intervention.
  American journal of obstetrics and gynecology 1990 Crombleholme TM, Harrison MR, Golbus MS, Longaker MT, Langer JC, Callen PW, Anderson RL, Goldstein RB, Filly RA
• Monochorionic twinning: sonographic assessment.
  AJR. American journal of roentgenology 1990 Filly RA, Goldstein RB, Callen PW
• Correction of congenital diaphragmatic hernia in utero, V. Initial clinical experience.
  Journal of pediatric surgery 1990 Harrison MR, Langer JC, Adzick NS, Golbus MS, Filly RA, Anderson RL, Rosen MA, Callen PW, Goldstein RB, deLorimier AA
• Effacement of the fetal cisterna magna in association with myelomeningocele.
  Radiology 1989 Goldstein RB, Podrasky AE, Filly RA, Callen PW
• Sonography of anencephaly: pitfalls in early diagnosis.
  Journal of clinical ultrasound : JCU 1989 Goldstein RB, Filly RA, Callen PW
• High-output cardiac failure in fetuses with large sacrococcygeal teratoma: diagnosis by echocardiography and Doppler ultrasound.
  The Journal of pediatrics 1989 Schmidt KG, Silverman NH, Harison MR, Callen PW
• Primary fetal hydrothorax: natural history and management.
  Journal of pediatric surgery 1989 Longaker MT, Laberge JM, Dansereau J, Langer JC, Crombleholme TM, Callen PW, Golbus MS, Harrison MR
• Fetal tissue sampling. The San Francisco experience with 190 pregnancies.
  The Western journal of medicine 1989 Golbus MS, McGonigle KF, Goldberg JD, Filly RA, Callen PW, Anderson RL
• Early experience with open fetal surgery for congenital hydronephrosis.
  Journal of pediatric surgery 1988 Crombleholme TM, Harrison MR, Langer JC, Longaker MT, Anderson RL, Slotnick NS, Filly RA, Callen PW, Goldstein RB, Golbus MS
• Natural history of fetal ventriculomegaly.
  Pediatrics 1988 Hudgins RJ, Edwards MS, Goldstein R, Callen PW, Harrison MR, Filly RA, Golbus MS
• Selective termination of multiple gestations.
  American journal of medical genetics 1988 Golbus MS, Cunningham N, Goldberg JD, Anderson R, Filly R, Callen P
• Severity of intestinal damage in gastroschisis: correlation with prenatal sonographic findings.
  Journal of pediatric surgery 1988 Bond SJ, Harrison MR, Filly RA, Callen PW, Anderson RA, Golbus MS
• Sonographic identification of autosomal recessive polycystic kidney disease associated with increased maternal serum/amniotic fluid alpha-fetoprotein.
  Obstetrics and gynecology 1988 Townsend RR, Goldstein RB, Filly RA, Callen PW, Anderson RL, Golbus M
• Factors affecting prenatal sonographic estimation of weight in extremely low birthweight infants.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1988 Townsend RR, Filly RA, Callen PW, Laros RK
• Amniotic sheets.
  Radiology 1988 Randel SB, Filly RA, Callen PW, Anderson RL, Golbus MS
• Pressure, biochemical, and culture characteristics of CSF associated with the in utero drainage of various fetal CNS defects.
  American journal of medical genetics 1988 Simpson GF, Edwards MS, Callen P, Filly RF, Anderson RL, Golbus MS
• Sonographic diagnosis of meconium ileus in utero.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1987 Goldstein RB, Filly RA, Callen PW
• Absorption of fetal intraperitoneal blood after intrauterine transfusion.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1987 Hashimoto B, Filly RA, Callen PW, Parer JT
• Evaluation of fetal femur length for prediction of gestational age in a racially mixed obstetric population.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1987 Ruvolo KA, Filly RA, Callen PW
• Objective method of diagnosing oligohydramnios in postterm pregnancies.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1987 Hashimoto B, Filly RA, Belden C, Callen PW, Laros RK
• Sonographic analysis of the fetus with ureteropelvic junction obstruction.
  AJR. American journal of roentgenology 1987 Kleiner B, Callen PW, Filly RA
• Gastroschisis: prenatal diagnosis and management.
  Fetal therapy 1987 Grundy H, Anderson RL, Filly RA, Callen P, Goldberg JD, Slotnick RN, Golbus MS
• Perinatal management of the fetus with an abdominal wall defect.
  Fetal therapy 1987 Langer JC, Harrison MR, Adzick NS, Longaker MT, Crombleholme TM, Golbus MS, Anderson RL, Callen PW, Filly RA
• The prognostic value of loculations in parapneumonic pleural effusions.
  Chest 1986 Himelman RB, Callen PW
• Renal allograft rejection: US evaluation.
  Radiology 1986 Hoddick W, Filly RA, Backman U, Callen PW, Vincenti F, Hricak H, Mahony BS, Amend W
• Multicystic dysplastic kidney: observations of contralateral disease in the fetal population.
  Radiology 1986 Kleiner B, Filly RA, Mack L, Callen PW
• Pseudo perisplenic "fluid collections": a clue to normal liver and spleen echogenic texture.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1986 Li DK, Cooperberg PL, Graham MF, Callen P
• Sonographic evaluation of cerebral cortical mantle thickness in the fetus and neonate with hydrocephalus.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1986 Callen PW, Hashimoto BE, Newton TH
• Ultrasound evaluation of polyhydramnios and twin pregnancy.
  American journal of obstetrics and gynecology 1986 Hashimoto B, Callen PW, Filly RA, Laros RK
• Multicystic dysplastic kidney in utero: changing appearance on US.
  Radiology 1986 Hashimoto BE, Filly RA, Callen PW
• Sonographic detection of fetal intraperitoneal fluid.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1986 Hashimoto BE, Filly RA, Callen PW
• Fetal pseudoascites: further anatomic observations.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1986 Hashimoto BE, Filly RA, Callen PW
• In utero analysis of heterozygous achondroplasia: variable time of onset as detected by femur length measurements.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1986 Kurtz AB, Filly RA, Wapner RJ, Golbus MS, Rifkin MR, Callen PW, Pasto ME
• Sonographic diagnosis of clubfoot in utero.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1986 Hashimoto BE, Filly RA, Callen PW
• The effect of ventricular dilatation upon biometry of the fetal head.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1986 Callen PW, Chooljian D
• Relationship of pleural effusions to pulmonary hemodynamics in patients with congestive heart failure.
  The American review of respiratory disease 1985 Wiener-Kronish JP, Matthay MA, Callen PW, Filly RA, Gamsu G, Staub NC
• Sonographic detection of drainage catheter debris.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1985 LaBerge JM, Callen PW
• Fetal cystic adenomatoid malformation: prenatal diagnosis and natural history.
  Journal of pediatric surgery 1985 Adzick NS, Harrison MR, Glick PL, Golbus MS, Anderson RL, Mahony BS, Callen PW, Hirsch JH, Luthy DA, Filly RA
• Fetal urethral obstruction: US evaluation.
  Radiology 1985 Mahony BS, Callen PW, Filly RA
• Magnetic resonance imaging of fetal anomalies in utero: early experience.
  AJR. American journal of roentgenology 1985 McCarthy SM, Filly RA, Stark DD, Callen PW, Golbus MS, Hricak H
• Anencephaly with encephalocele in craniopagus twins: prenatal diagnosis by ultrasonography and computed tomography.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1985 Abrams SL, Callen PW, Anderson RL, Stephens JD
• Placental thickness.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1985 Hoddick WK, Mahony BS, Callen PW, Filly RA
• Management of the fetus with congenital hydronephrosis II: Prognostic criteria and selection for treatment.
  Journal of pediatric surgery 1985 Glick PL, Harrison MR, Golbus MS, Adzick NS, Filly RA, Callen PW, Mahony BS, Anderson RL, deLorimier AA
• The missing link in the pathogenesis of gastroschisis.
  Journal of pediatric surgery 1985 Glick PL, Harrison MR, Adzick NS, Filly RA, deLorimier AA, Callen PW
• Fetal urinary tract obstruction: management and selection for treatment.
  Seminars in perinatology 1985 Golbus MS, Filly RA, Callen PW, Glick PL, Harrison MR, Anderson RL
• Sonographic demonstration of fetal sacrococcygeal teratoma.
  Prenatal diagnosis 1985 Holzgreve W, Mahony BS, Glick PL, Filly RA, Harrison MR, Delorimier AA, Holzgreve AC, Muller KM, Callen PW, Anderson RL
• Ultrasound evaluation of the normal fetal upper airway and esophagus.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1985 Cooper C, Mahony BS, Bowie JD, Albright TO, Callen PW
• Nonpalpable breast lesion localization: limited efficacy of sonography.
  Radiology 1985 Weber WN, Sickles EA, Callen PW, Filly RA
• Sonography, a complementary examination to alpha-fetoprotein testing for fetal neural tube defects.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1985 Hashimoto BE, Mahony BS, Filly RA, Golbus MS, Anderson RL, Callen PW
• Umbilical vein thrombosis: sonographic detection in utero.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1985 Abrams SL, Callen PW, Filly RA
• Intrauterine growth retardation: evaluation by magnetic resonance. Work in progress.
  Radiology 1985 Stark DD, McCarthy SM, Filly RA, Callen PW, Hricak H, Parer JT
• Pelvimetry by magnetic resonance imaging.
  AJR. American journal of roentgenology 1985 Stark DD, McCarthy SM, Filly RA, Parer JT, Hricak H, Callen PW
• Sonographic evaluation of ectopic pregnancy.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1985 Mahony BS, Filly RA, Nyberg DA, Callen PW
• Sonographic monitoring of hepatic cryosurgery in an experimental animal model.
  AJR. American journal of roentgenology 1985 Onik G, Gilbert J, Hoddick W, Filly R, Callen P, Rubinsky B, Farrel L
• The amniotic band syndrome: antenatal sonographic diagnosis and potential pitfalls.
  American journal of obstetrics and gynecology 1985 Mahony BS, Filly RA, Callen PW, Golbus MS
• Amnionicity and chorionicity in twin pregnancies: prediction using ultrasound.
  Radiology 1985 Mahony BS, Filly RA, Callen PW
• Prenatal diagnosis and natural history of the fetus with a congenital diaphragmatic hernia: initial clinical experience.
  Journal of pediatric surgery 1985 Nakayama DK, Harrison MR, Chinn DH, Callen PW, Filly RA, Golbus MS, De Lorimier AA
• The distal femoral epiphyseal ossification center in the assessment of third-trimester menstrual age: sonographic identification and measurement.
  Radiology 1985 Mahony BS, Callen PW, Filly RA
• A specular reflection arising from the ventricular wall: a potential pitfall in the diagnosis of germinal matrix hemorrhage.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1985 Siedler DE, Mahony BS, Hoddick WK, Callen PW
• Thanatophoric dwarfism with the cloverleaf skull: a specific antenatal sonographic diagnosis.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1985 Mahony BS, Filly RA, Callen PW, Golbus MS
• Minimal fetal renal pyelectasis.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1985 Hoddick WK, Filly RA, Mahony BS, Callen PW
• Obstetrical magnetic resonance imaging: fetal anatomy.
  Radiology 1985 McCarthy SM, Filly RA, Stark DD, Hricak H, Brant-Zawadzki MN, Callen PW, Higgins CB
• Obstetrical magnetic resonance imaging: maternal anatomy.
  Radiology 1985 McCarthy SM, Stark DD, Filly RA, Callen PW, Hricak H, Higgins CB
• Iliac venous aneurysm in a pregnant patient with a renal transplant. A case report.
  The Journal of reproductive medicine 1984 Parer JT, Lichtenberg ES, Callen PW, Feduska N
• Investigation of nonimmune hydrops fetalis.
  American journal of obstetrics and gynecology 1984 Holzgreve W, Curry CJ, Golbus MS, Callen PW, Filly RA, Smith JC
• The fetal cisterna magna.
  Radiology 1984 Mahony BS, Callen PW, Filly RA, Hoddick WK
• Ultrasound evaluation of benign sciatic nerve sheath tumors.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1984 Hoddick WK, Callen PW, Filly RA, Mahony BS, Edwards MB
• Management of the fetus with an abdominal wall defect.
  Journal of pediatric surgery 1984 Nakayama DK, Harrison MR, Gross BH, Callen PW, Filly RA, Golbus MS, Stephens JD, de Lorimier AA
• Ultrasonographic determination of qualitative amniotic fluid volume in intrauterine growth retardation: reassessment of the 1 cm rule.
  American journal of obstetrics and gynecology 1984 Hoddick WK, Callen PW, Filly RA, Creasy RK
• Fetal renal dysplasia: sonographic evaluation.
  Radiology 1984 Mahony BS, Filly RA, Callen PW, Hricak H, Golbus MS, Harrison MR
• Management of ventriculomegaly in the fetus.
  The Journal of pediatrics 1984 Glick PL, Harrison MR, Nakayama DK, Edwards MS, Filly RA, Chinn DH, Callen PW, Wilson SL, Golbus MS
• Progression of infantile polycystic kidney disease in early pregnancy.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1984 Mahony BS, Callen PW, Filly RA, Golbus MS
• Severe nonimmune hydrops fetalis: sonographic evaluation.
  Radiology 1984 Mahony BS, Filly RA, Callen PW, Chinn DH, Golbus MS
• Alobar holoprosencephaly: ultrasonographic prenatal diagnosis.
  Radiology 1984 Filly RA, Chinn DH, Callen PW
• Benign breast lesions: ultrasound detection and diagnosis.
  Radiology 1984 Sickles EA, Filly RA, Callen PW
• Intracranial hemorrhage: late onset in the preterm neonate.
  Radiology 1983 Hecht ST, Filly RA, Callen PW, Wilson-Davis SL
• Re: Prenatal diagnosis and treatment of fetal hydronephrosis: how realistic?
  Radiology 1983 Filly RA, Golbus MS, Harrison MR, Callen PW
• Ultrasound of the acutely ill obstetrics and gynecology patient.
  Radiologic clinics of North America 1983 Chinn DH, Callen PW
• The lateral cerebral ventricle in early second trimester.
  Radiology 1983 Chinn DH, Callen PW, Filly RA
• A potential pitfall in the ultrasonographic diagnosis of fetal encephalocele.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1983 Fink IJ, Chinn DH, Callen PW
• Congenital diaphragmatic hernia diagnosed prenatally by ultrasound.
  Radiology 1983 Chinn DH, Filly RA, Callen PW, Nakayama DK, Harrison MR
• Gangrenous cholecystitis: diagnosis by ultrasound.
  Radiology 1983 Jeffrey RB, Laing FC, Wong W, Callen PW
• Radiology-important advances in clinical medicine: needle biopsy.
  The Western journal of medicine 1983 Wall SD, Callen PW
• Ultrasonographic evaluation of fetal paranephric pseudocysts.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1983 Callen PW, Bolding D, Filly RA, Harrison MR
• Neonatal kidneys: sonographic anatomic correlation.
  Radiology 1983 Hricak H, Slovis TL, Callen CW, Callen PW, Romanski RN
• Ultrasonographic identification of fetal lower extremity epiphyseal ossification centers.
  Radiology 1983 Chinn DH, Bolding DB, Callen PW, Gross BH, Filly RA
• Breast cancer detection with sonography and mammography: comparison using state-of-the-art equipment.
  AJR. American journal of roentgenology 1983 Sickles EA, Filly RA, Callen PW
• Real-time vs. static scanning in the diagnosis of abdominal and pelvic abscesses.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1983 Gross BH, Chinn DH, Callen PW, Filly RA
• Supermarket sales of high-sugar products in predominantly Black, Hispanic, and white census tracts of Houston, Texas.
  The American journal of clinical nutrition 1983 Kerr GR, Amante P, Decker M, Callen PW
• Intraventricular hemorrhage following ventriculoperitoneal shunt placement: real-time ultrasonographic demonstration.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1983 Mahony BS, Gross BH, Callen PW, Filly RA, Edwards MS
• Ultrasonic evaluation of common bile duct stones: prospective comparison with endoscopic retrograde cholangiopancreatography.
  Radiology 1983 Gross BH, Harter LP, Gore RM, Callen PW, Filly RA, Shapiro HA, Goldberg HI
• Prenatal diagnosis of osteogenesis imperfecta type II by real-time ultrasound.
  Human genetics 1983 Stephens JD, Filly RA, Callen PW, Golbus MS
• Fetal treatment 1982.
  The New England journal of medicine 1982 Harrison MR, Filly RA, Golbus MS, Berkowitz RL, Callen PW, Canty TG, Catz C, Clewell WH, Depp R, Edwards MS, Fletcher JC, Frigoletto FD, Garrett WJ, Johnson ML, Jonsen A, De Lorimier AA, Liley WA, …
• Management of the fetus with congenital hydronephrosis.
  Journal of pediatric surgery 1982 Harrison MR, Golbus MS, Filly RA, Nakayama DK, Callen PW, de Lorimier AA, Hricak H
• Portal-systemic encephalopathy due to a congenital portocaval shunt.
  AJR. American journal of roentgenology 1982 Kerlan RK, Sollenberger RD, Palubinskas AJ, Raskin NH, Callen PW, Ehrenfeld WK
• Prenatal percutaneous antegrade pyelography in posterior urethral valves: sonographic guidance.
  AJR. American journal of roentgenology 1982 Gore RM, Callen PW, Filly RA, Harrison MR, Golbus MS
• The relationship of fetal transverse body diameter and biparietal diameter in the diagnosis of intrauterine growth retardation.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1982 Gross BH, Callen PW, Filly RA
• Sonographic diagnosis of thanatophoric dwarfism in utero.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1982 Fink IJ, Filly RA, Callen PW, Fiske CC
• Sonography as a procedure complementary to alpha-fetoprotein testing for neural tube defects.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1982 Slotnick N, Filly RA, Callen PW, Golbus MS
• Ultrasonic evaluation of abdominal aortic thrombus.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1982 Harter LP, Gross BH, Callen PW, Barth RA
• The varied sonographic appearance of the urinary tract in the fetus and newborn with urethral obstruction.
  Radiology 1982 Glazer GM, Filly RA, Callen PW
• Lesser sac fluid in predicting the etiology of ascites: CT findings.
  AJR. American journal of roentgenology 1982 Gore RM, Callen PW, Filly RA
• Ultrasonic evaluation of fetal umbilical and hepatic vascular anatomy.
  Radiology 1982 Chinn DH, Filly RA, Callen PW
• Ethnic patterns of salt purchase in Houston, Texas.
  American journal of epidemiology 1982 Kerr GR, Amante P, Decker M, Callen PW
• Ultrasonographic anatomy of the caudate lobe.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1982 Brown BM, Filly RA, Callen PW
• Unusual ultrasonographic appearance of a solid schwannoma.
  Journal of clinical ultrasound : JCU 1982 Chinn DH, Filly RA, Callen PW
• Fetal surgery for congenital hydronephrosis.
  The New England journal of medicine 1982 Harrison MR, Golbus MS, Filly RA, Callen PW, Katz M, de Lorimier AA, Rosen M, Jonsen AR
• Displaced retroperitoneal fat: sonographic guide to right upper quadrant mass localization.
  Radiology 1982 Gore RM, Callen PW, Filly RA
• Ultrasound appearance of fetal greater omentum.
  Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine 1982 Gross BH, Callen PW, Filly RA
• In utero treatment of urinary tract obstruction.
  American journal of obstetrics and gynecology 1982 Golbus MS, Harrison MR, Filly RA, Callen PW, Katz M
• Medullary nephrocalcinosis: sonographic evaluation.
  AJR. American journal of roentgenology 1982 Glazer GM, Callen PW, Filly RA
• Real-time evaluation of pleural lesions: new observations regarding the probability of obtaining free fluid.
  Radiology 1982 Marks WM, Filly RA, Callen PW
• CT diagnosis of tumor thrombus in the inferior vena cava: avoiding the false-positive diagnosis.
  AJR. American journal of roentgenology 1981 Glazer GM, Callen PW, Parker JJ
• Computed tomography and ultrasonography of primary liver tumors.
  Radiology 1981 Callen PW, Filly RA
• Intrauterine transfusion under sonographic guidance.
  The Journal of reproductive medicine 1981 Parer JT, Callen PW, Creasy RK, Filly RA
• The normal choroid plexus: ultrasonographic appearance of the neonatal head.
  Radiology 1981 Fiske CE, Filly RA, Callen PW
• Further observations on the sonographic spectrum of gestational trophoblastic disease.
  Journal of clinical ultrasound : JCU 1981 Munyer TP, Callen PW, Filly RA, Braga CA, Jones HW
• Sonographic measurement of lateral ventricular width in early ventricular dilation.
  Journal of clinical ultrasound : JCU 1981 Fiske CE, Filly RA, Callen PW
• Prediction of intrauterine growth retardation by sonographic estimation of total intrauterine volume.
  Journal of clinical ultrasound : JCU 1981 Chinn DH, Filly RA, Callen PW
• Gastroesophageal region: source of confusion on CT.
  AJR. American journal of roentgenology 1981 Marks WM, Callen PW, Moss AA
• Solid parenchymal lesions of the kidney.
  Journal of clinical ultrasound : JCU 1981 Fiske CE, Filly RA, Callen PW
• Fluid collections ultrasonically simulating urinary bladder.
  Journal of the Canadian Association of Radiologists 1980 Fiske CE, Callen PW
• Ultrasonic evaluation of normal pancreatic echogenicity and its relationship to fat deposition.
  Radiology 1980 Marks WM, Filly RA, Callen PW
• Computed tomography in the evaluation of patients with surgical clips.
  Surgery, gynecology & obstetrics 1980 Marks WM, Callen PW
• Computed tomography of psoas abscesses.
  Journal of computer assisted tomography 1980 Jeffrey RB, Callen PW, Federle MP
• Intrauterine contraceptive devices: evaluation by sonography.
  AJR. American journal of roentgenology 1980 Callen PW, Filly RA, Munyer TP
• Successful therapy of an ACTH-producing gastric carcinoid APUD tumor: report of a case and review of the literature.
  Cancer 1980 Marcus FS, Friedman MA, Callen PW, Churg A, Harbour J
• Ultrasonography and computed tomography in the evaluation of hepatic microabscesses in the immunosuppressed patient.
  Radiology 1980 Callen PW, Filly RA, Marcus FS
• First trimester molar pregnancy: nonspecific ultrasonographic appearance.
  Obstetrics and gynecology 1980 Woodward RM, Filly RA, Callen PW
• The placental-subplacental complex: a specific indicator of placental position on ultrasound.
  Journal of clinical ultrasound : JCU 1980 Callen PW, Filly RA
• Computed tomographic evaluation of the dilated pancreatic duct: the value of thin-section collimation.
  Radiology 1980 Callen PW, London SS, Moss AA
• Lymphomatous masses simulating cysts by ultrasonography.
  Journal of the Canadian Association of Radiologists 1979 Callen PW, Marks WM
• Mode of delivery and the lecithin/sphingomyelin ratio.
  British journal of obstetrics and gynaecology 1979 Callen P, Goldsworthy S, Graves L, Harvey D, Mellows H, Parkinson C
• Ultrasonographic localization of the gallbladder.
  Radiology 1979 Callen PW, Filly RA
• The decidual cast of ectopic pregnancy: a confusing ultrasonographic appearance.
  Radiology 1979 Marks WM, Filly RA, Callen PW, Laing FC
• Computed tomography and ultrasonography in the evaluation of the retroperitoneum in patients with malignant ascites.
  Journal of computer assisted tomography 1979 Callen PW, Marks WM, Filly RA
• The quadratus lumborum muscle: a possible source of confusion in sonographic evaluation of the retroperitoneum.
  Journal of clinical ultrasound : JCU 1979 Callen PW, Filly RA, Marks WM
• Computed tomography of the pelvis and retroperitoneum.
  Radiologic clinics of North America 1979 Korobkin M, Callen PW, Fisch AE
• Cystic Hodgkin's lymphoma of the thymus: computed tomography appearance.
  Journal of computer assisted tomography 1979 Federle MP, Callen PW
• Carcinoma of the tail of the pancreas: an unusual CT appearance.
  AJR. American journal of roentgenology 1979 Callen PW, Breiman RS, Korobkin M, De Martini WJ, Mani JR
• CT evaluation of anomalies of the inferior vena cava and left renal vein.
  AJR. American journal of roentgenology 1979 Royal SA, Callen PW
• Ultrasonography in the evaluation of intrauterine transfusion.
  Obstetrics and gynecology 1979 Callen PW, Filly RA, Creasy RK, Parer JT
• Computed tomographic evaluation of abdominal and pelvic abscesses.
  Radiology 1979 Callen PW
• Fetal pseudoascites.
  Radiology 1979 Rosenthal SJ, Filly RA, Callen PW, Sommer FG
• Normal ultrasonic appearance of the ligamentum teres and falciform ligament.
  Journal of clinical ultrasound : JCU 1979 Callen PW
• The central uterine cavity echo: a useful anatomic sign in the ultrasonographic evaluation of the female pelvis.
  Radiology 1979 Callen PW, DeMartini WJ, Filly RA
• Ultrasonic anatomy of the liver: a review with new applications.
  Journal of clinical ultrasound : JCU 1979 Marks WM, Filly RA, Callen PW
• Ultrasonography of the diaphragmatic crura.
  Radiology 1979 Callen PW, Filly RA, Sarti DA, Sample WF
• The left portal vein: a possible source of confusion on ultrasonograms.
  Radiology 1979 Callen PW, Filly RA, DeMartini WJ
• Capability of CT body scanning and ultrasonography to demonstrate the status of the biliary ductal system in patients with jaundice.
  Radiology 1978 Goldberg HI, Filly RA, Korobkin M, Moss AA, Kressel HY, Callen PW
• CT diagnosis of tumor thrombosis of the renal vein and inferior vena cava.
  AJR. American journal of roentgenology 1978 Marks WM, Korobkin M, Callen PW, Kaiser JA
• Computed tomographic evaluation of disorders affecting the alimentary tract.
  Radiology 1978 Kressel HY, Callen PW, Montagne JP, Korobkin M, Goldberg HI, Moss AA, Arger PH, Margulis AR
• Computed tomography of subcapsular splenic hematoma. Clinical and experimental studies.
  Radiology 1978 Korobkin M, Moss AA, Callen PW, DeMartini WJ, Kaiser JA
• Comparison of computed tomography, ultrasonography, and gallium-67 scanning in the evaluation of suspected abdominal abscess.
  Radiology 1978 Korobkin M, Callen PW, Filly RA, Hoffer PB, Shimshak RR, Kressel HY
• Ascitic fluid in the anterior paravesical fossa: misleading appearance on CT scans.
  AJR. American journal of roentgenology 1978 Callen PW, Filly RA, Korobkin M
• Ultrasonography in the evaluation of nontraumatic abdominopelvic emergencies.
  Radiologic clinics of North America 1978 Filly RA, Callen PW
• Computed tomographic evaluation of the diaphragmatic crura.
  Radiology 1978 Callen PW, Filly RA, Korobkin M
• Computed tomographic evaluation of the retrocrural prevertebral space.
  AJR. American journal of roentgenology 1977 Callen PW, Korobkin M, Isherwood I
• Incidence of sudden infant death syndrome in Texas, 1969-1972; estimation by the surrogate method.
  Texas medicine 1976 Maxwell R, Roht LH, Callen P
• Induced abortion in Texas.
  Texas medicine 1976 Roht LH, Nelson RO, Callen P
• The association of multiple induced abortions with subsequent prematurity and spontaneous abortion.
  Acta obstetrica et gynaecologica Japonica 1976 Roht LH, Aoyama H, Leinen GE, Callen PW
• Serosal onlay repair of common duct stricture.
  American journal of surgery 1974 Condon RE, Callen P, Beltz WR, Van Meter SW, Pissiotis CA, Nichols RL
• [Clinical trial of Versapen in pneumophtisiology].
  Bordeaux medical 1971 Fréour P, Bernadou M, Leguay L, Galleno A, Callen P, Tessier JF
• Joint study of extracranila arterial occlusion. 3. Progress report of controlled study of long-term survival in patients with and without operation.
  JAMA 1969 Bauer RB, Meyer JS, Fields WS, Remington R, Macdonald MC, Callen P