이중시기(Dual-phase)나선식 CT에서 비장의 크기와 간문맥의 조영증강과의 상관성 연구 = Correlation Between Contrast Enhancement of Portal Vein and Spleen Size in Dual-phase Spirla CT

다국어 초록 (Multilingual Abstract)

Purpose : To evaluate using spiral CT the effect of spleen size on blood flow in the portal venous system andto know the usefulness of this evaluation.. Materials and Methods : Fifty-one patients without evidence on spiralCT scan of abnormality thought to affect portal venous flow presented between December 1994 and June 1995. Wemeasured spleen size and Hounsfield units of portal vein in dual-phase, and calculated the ratio of the unit inthe portal phase to that in the arterial phase. Spleen size was measured, using the length of X-axis by that ofZ-axis on spiral CT scan. We then measured the correlation between the two values. CT was performed with a SomatomPlus-S scanner(Siemens, Erlangen, Germany). A total dose of 120ml of non-ionic contrast material(Ultravist) wasadministered at a rate of 3ml/sec. Arterial and portal phase were obtained after 30 seconds and 60 seconds fromthe beginning of the contrast agent injection. Results : The correlation between spleen size and contrastenhancement of the portal vein was relatively significant(Pearson's correlation coefficient(r)=0.41801).Conclusions : Spleen size significantly affects portal venous flow on spiral CT scan. The evaluation of spleensize and contrast enhancement of the portal vein could be useful in the differential diagnosis of diseases whichaffect portal venous flow.