Peter Callen, MD


Dr. Peter Callen specializes in diagnostic ultrasound. His interest is in fetal abnormality detection, and he works closely with the Fetal Treatment Center at the UCSF Benioff Children's Hospital. He is the author and editor of the most widely used textbook in diagnostic obstetric sonography "Ultrasonography in Obstetrics and Gynecology," now in its fourth edition.

Callen completed his undergraduate studies at the University of Illinois. He went on to earn his medical degree from the University of California, San Francisco, where he also completed his residency in radiology and is a professor of radiology, obstetrics, gynecology and reproductive sciences. He is board certified in diagnostic radiology.


Fetal Treatment Center
1855 Fourth St., Second Floor, Room A-2432
San Francisco, CA 94158
Phone: (800) 793-3887
Fax: (415) 502-0660

Hours: Monday to Friday
8 a.m. - 5 p.m.

Academic Title


More about Peter Callen


UCSF 1973


UCSF, Radiology 1977

Selected Research and Publications

  1. Courtier J, Schauer GM, Parer JT, Regenstein AC, Callen PW, Glenn OA. Polymicrogyria in a fetus with human parvovirus B19 infection: a case with radiologic-pathologic correlation. Ultrasound Obstet Gynecol. 2012 Nov; 40(5):604-6.
  2. Shoo BA, Kangelaris G, Callen PW, Kashani-Sabet M, Leong SP. Detection of occult melanoma by preoperative positron emission tomography-computed tomography and intraoperative ultrasonography. J Cutan Med Surg. 2010 May-Jun; 14(3):130-5.
  3. Filly MR, Callen PW, Yegul NT, Filly RA. The yolk stalk sign: evidence of death in small embryos without heartbeats. J Ultrasound Med. 2010 Feb; 29(2):237-41.
  4. Qayyum A, Chen DM, Breiman RS, Westphalen AC, Yeh BM, Jones KD, Lu Y, Coakley FV, Callen PW. Evaluation of diffuse liver steatosis by ultrasound, computed tomography, and magnetic resonance imaging: which modality is best? Clin Imaging. 2009 Mar-Apr; 33(2):110-5.
  5. Blackman J, Liddicoat A, Callen P, Marshall R. Degenerating leiomyoma presenting as a large pelvic cyst in pregnancy. J Obstet Gynaecol. 2008 Apr; 28(3):342-3.
  6. Kassab A, El-Bialy G, Hashesh H, Callen P. Magnetic resonance imaging and hysteroscopy to diagnose colo-uterine fistula: a rare complication of diverticulitis. J Obstet Gynaecol Res. 2008 Feb; 34(1):117-20.
  7. Callen PW, Callen AL, Glenn OA, Toi A. Columns of the fornix, not to be mistaken for the cavum septi pellucidi on prenatal sonography. J Ultrasound Med. 2008 Jan; 27(1):25-31.
  8. Glenn OA, Bianco K, Barkovich AJ, Callen PW, Parer JT. Fetal cerebellar hemorrhage in parvovirus-associated non-immune hydrops fetalis. J Matern Fetal Neonatal Med. 2007 Oct; 20(10):769-72.
  9. Yang SH, Nobuhara KK, Keller RL, Ball RH, Goldstein RB, Feldstein VA, Callen PW, Filly RA, Farmer DL, Harrison MR, Lee H. 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. Am J Obstet Gynecol. 2007 Jul; 197(1):30.e1-7.
  10. Kassab A, El-Bialy G, Clark J, Callen P, Powari M, Jones H. Unusual presentation of 22-kilogram retroperitoneal müllerian serous cystadenoma. Gynecol Oncol. 2007 Jan; 104(1):257-9.
  11. Aziz S, Callen PW, Vincenti F, Hirose R. Rapidly developing nephrocalcinosis in a patient with end-stage liver disease who received a domino liver transplant from a patient with known congenital oxalosis. J Ultrasound Med. 2005 Oct; 24(10):1449-52.
  12. Williams G, Coakley FV, Qayyum S, Glenn OA, Breiman RS, Callen PW. Evaluation of femur length during the second and third trimesters in fetuses with myelomeningocele. Ultrasound Obstet Gynecol. 2004 Feb; 23(2):148-51.
  13. Wu YW, Hamrick SE, Miller SP, Haward MF, Lai MC, Callen PW, Barkovich AJ, Ferriero DM. Intraventricular hemorrhage in term neonates caused by sinovenous thrombosis. Ann Neurol. 2003 Jul; 54(1):123-6.
  14. Keller RL, Glidden DV, Paek BW, Goldstein RB, Feldstein VA, Callen PW, Filly RA, Albanese CT. The lung-to-head ratio and fetoscopic temporary tracheal occlusion: prediction of survival in severe left congenital diaphragmatic hernia. Ultrasound Obstet Gynecol. 2003 Mar; 21(3):244-9.
  15. Kinoshita LL, Callen PW, Filly RA, Hill LM. Sonographic detection of gallbladder duplication: two cases discovered in utero. J Ultrasound Med. 2002 Dec; 21(12):1417-21.
  16. Filly RA, Reddy SG, Nalbandian AB, Lu Y, Callen PW. Sonographic evaluation of liver nodularity: Inspection of deep versus superficial surfaces of the liver. J Clin Ultrasound. 2002 Sep; 30(7):399-407.
  17. Paek BW, Callen PW, Kitterman J, Feldstein VA, Farrell J, Harrison MR, Albanese CT. Successful fetal intervention for congenital high airway obstruction syndrome. Fetal Diagn Ther. 2002 Sep-Oct; 17(5):272-6.
  18. Bredella MA, Feldstein VA, Filly RA, Goldstein RB, Callen PW, Genant HK. Measurement of endometrial thickness at US in multicenter drug trials: value of central quality assurance reading. Radiology. 2000 Nov; 217(2):516-20.
  19. Skaife T, Callen PW, Coakley F. Prenatal sonographic findings in fetal cirrhosis secondary to hemochromatosis. J Ultrasound Med. 2000 Apr; 19(4):285-8.
  20. Vincoff NS, Callen PW, Smith-Bindman R, Goldstein RB. Effect of ultrasound transducer frequency on the appearance of the fetal bowel. J Ultrasound Med. 1999 Dec; 18(12):799-803; quiz 805-6.

Publications are derived from MEDLINE/PubMed and provided by UCSF Profiles, a service of the Clinical & Translational Science Institute (CTSI) at UCSF. Researchers can make corrections and additions to their publications by logging on to UCSF Profiles.