Hepatic perfusion abnormalities during CT angiography: Detection and interpretation
Twenty-seven perfusion abnormalities were detected in 17 of 50 patients who underwent computed tomographic angiography (CTA) of the liver. All but one of the perfusion abnormalities occurred in patients with primary or metastatic liver tumors. Perfusion abnormalities were lobar in nine cases, segmental in 11, and subsegmental in seven; 14 were hypoperfusion and 13 were hyperperfusion abnormalities. The causes for the abnormalities included nonperfusion of a replaced hepatic artery (n = 11), cirrhosis and nodular regeneration (n = 3), altered hepatic hemodynamics (e.g., siphoning, laminar flow) caused by tumor (n = 7), contrast media washout from a nonperfused vessel (n = 1), compression of adjacent hepatic parenchyma (n = 1), and unknown (n = 4). Differentiation of perfusion abnormalities from tumor usually can be made by comparing the morphology of the known tumor with the suspected perfusion abnormality, changes of each on delayed CTA scans, and review of initial angiograms and other imaging studies.
- Research Organization:
- Dept. of Radiology, Mason Clinic, P.O. Box 900, Seattle, WA 98111
- OSTI ID:
- 6718593
- Report Number(s):
- CONF-861136-; TRN: 87-013290
- Journal Information:
- Radiology; (United States), Vol. 159:3; Conference: 72. scientific assembly and annual meeting of RSNA, Chicago, IL, USA, 30 Nov 1986
- Country of Publication:
- United States
- Language:
- English
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LIVER
BIOMEDICAL RADIOGRAPHY
CAT SCANNING
BLOOD VESSELS
COMPUTERIZED TOMOGRAPHY
DATA ANALYSIS
DETECTION
MORPHOLOGICAL CHANGES
MORPHOLOGY
NEOPLASMS
PATHOLOGICAL CHANGES
BODY
CARDIOVASCULAR SYSTEM
DIAGNOSTIC TECHNIQUES
DIGESTIVE SYSTEM
DISEASES
GLANDS
MEDICINE
NUCLEAR MEDICINE
ORGANS
RADIOLOGY
TOMOGRAPHY
550603* - Medicine- External Radiation in Therapy- (1980-)
550602 - Medicine- External Radiation in Diagnostics- (1980-)