Clinical Focus

  • Diagnostic Radiology

Academic Appointments

  • Professor - Med Center Line, Radiology

Administrative Appointments

  • Assistant Professor of Radiology, University of California, SOM (1979 - 1982)
  • Associate Professor of Radiology;Chief of Section-CT Body Scanning & GI Radiology, University of California, SOM (1982 - 1984)
  • Professor of Radiology, Chief, Department of Radiology, San Francisco General Hospital (1984 - 1989)
  • Vice-Chairman, Department of Radiology, University of California, SOM (1984 - 1989)
  • Chief of Medical Staff, San Francisco General Hospital (1987 - 1988)
  • Professor and Chairman, Department of Radiology, University of Pittsburgh Medical Center (1989 - 1992)
  • Director, Abdominal Imaging, Department of Radiology, University of Pittsburgh Medical Center (1992 - 2008)
  • Chief, Quality Process and Improvement, Department of Radiology, University of Pittsburgh Medical Center (2008 - 2008)
  • Professor and Associate Chair for Education, Department of Radiology, Stanford University Medical Center (2008 - Present)

Honors & Awards

  • Blue Ribbon Award-Best Scientific Lecture/Exhibit, American Urological Association, Boston, Massachusetts (1981)
  • Cum Laude Award-Radiologic-Pathologic Correlation in Liver Cirrhosis, (Society of Computed Body Tomography) (1993)
  • Magna cum laude award Spectrum of imaging findings in hepatic cirrhosis, Radiological Society of North America (1993)
  • Presidential Service Award, Pittsburgh Roentgen Society (1995)
  • Certificate of Merit Citation, RSNA (1999)
  • Editor's Recognition Award with Distinction, Radiology (1996 – 2000)
  • Editor's Certificate of Recognition, Radiographics (2000)
  • Michael P. Federle Mentorship Award (First Recipient), University of Pittsburgh School of Medicine (2207)
  • Teaching Division of the Year, Department of Radiology, University of Pittsburgh School of Medicine (2008)
  • Walter B. Cannon Medal, The Society of Gastrointestinal Radiologists (2010)

Professional Education

  • Fellowship:Univ of California San Francisco (1979) CA
  • Medical Education:Georgetown University (1974) DC
  • Residency:University of Cincinnati (1978) OH
  • Board Certification: Diagnostic Radiology, American Board of Radiology (1978)
  • Internship:University of Cincinnati (1975) OH
  • N/A, Harvard University, Program for Chiefs, Clin. Svcs. (1989)
  • Clinical Instructor, UCSF School of Medicine, CT Body/Scanning/GI (1979)
  • Resident, U of Cincinnati Hosp., Radiology (1978)
  • Intern, U of Cincinnati Hosp., Internal Medicine (1975)
  • MD, Georgetown University, Medicine (1974)


2015-16 Courses


All Publications

  • Imaging Manifestations of Abdominal Fat Necrosis and Its Mimics RADIOGRAPHICS Kamaya, A., Federle, M. P., Desser, T. S. 2011; 31 (7): 2021-2034


    Intraabdominal fat is a metabolically active tissue that may undergo necrosis through a number of mechanisms. Fat necrosis is a common finding at abdominal cross-sectional imaging, and it may cause abdominal pain, mimic findings of acute abdomen, or be asymptomatic and accompany other pathophysiologic processes. Common processes that are present in fat necrosis include torsion of an epiploic appendage, infarction of the greater omentum, and fat necrosis related to trauma or pancreatitis. In addition, other pathologic processes that involve fat may be visualized at computed tomography, including focal lipohypertrophy, pathologic fat paucity (lipodystrophies), and malignancies such as liposarcoma, which may mimic benign causes of fat stranding. Because fat necrosis and malignant processes such as liposarcoma and peritoneal carcinomatosis may mimic one another, knowledge of a patient's clinical history and prior imaging studies is essential for accurate diagnosis.

    View details for DOI 10.1148/rg.317115046

    View details for Web of Science ID 000297047000019

    View details for PubMedID 22084185

  • Using contrast-enhanced helical CT to visualize arterial extravasation after blunt abdominal trauma: Incidence and organ distribution AMERICAN JOURNAL OF ROENTGENOLOGY Yao, D. C., Jeffrey, R. B., MIRVIS, S. E., Weekes, A., Pederle, M. P., Kim, C., Lane, M. J., Prabhakar, P., Ralls, P. W. 2002; 178 (1): 17-20


    We evaluated the incidence and organ distribution of arterial extravasation identified using contrast-enhanced helical CT in patients who had sustained abdominal visceral injuries and pelvic fractures after blunt trauma.Five hundred sixty-five consecutive patients from four level I trauma centers who had CT scans showing abdominal visceral injuries or pelvic fractures were included in this series. The presence or absence of arterial extravasation, as well as the anatomic sites of arterial extravasation, was noted. We obtained clinical follow-up data, including surgical or angiographic findings.In our series, 104 (18.4%) of 565 patients had arterial extravasation. Of the 104 patients, 81 (77.9%) underwent surgery, embolization, or both. The combined rate of surgery or embolization in patients with arterial extravasation was statistically higher than expected at all four institutions (p <0.001). The spleen was the most common organ injured, occurring in 277 (49.0%) of 565 patients, and arterial extravasation occurred in 49 (17.7%) of 277 patients with splenic injury. Several other visceral injuries were associated with arterial extravasation, including hepatic, renal, adrenal, and mesenteric injuries.Based on the limited reports of arterial extravasation in the nonhelical CT literature, the percentage (18%) of clinically stable patients in our study with CT scans showing arterial extravasation was higher than anticipated. This finding likely reflects the improved diagnostic capability of helical CT. Although the spleen and liver were the organs most commonly associated with arterial extravasation, radiologists should be aware that arterial extravasation may be associated with several other visceral injuries.

    View details for Web of Science ID 000172927900003

    View details for PubMedID 11756079

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