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目的：评价肝脏疾病因素对双螺旋ＣＴ门脉血管成像（ＤＳＣＴＰ）质量的影响。材料与方法：９７例患者进行了ＤＳＣＴＰ成像，其中肝脏ＣＴ扫描正常或相对轻度异常者６２例（甲组），肝脏病变较严重者３５例（乙组）。螺距（ｐｉｔｃｈ）为１～１．５，层厚为２．５～５ｍｍ。采用ＭＩＰ法重建ＤＳＣＴＰ影像。比较甲乙两组ＤＳＣＴＰ影像质量。结果：在ＤＳＣＴＰ图像质量方面，甲组优于乙组，即肝硬化、门脉高压、巨块型肝癌或弥漫型肝癌、门脉栓塞等，门脉成像质量差。结论：肝脏疾患可影响门脉强化或使门脉管径变细，使螺旋ＣＴ门脉成像质量下降
Objective: To evaluate the effect of liver disease on the quality of double-helical CT portal venography (DSCTP). MATERIALS AND METHODS: Ninety-seven patients underwent DSCTP, of which 62 (group A) had normal or mild liver CT scan and 35 had severe liver lesion (group B). Pitch is 1 ~ 1.5, thickness is 2.5 ~ 5mm. Reconstruction of DSCTP images by MIP method. Comparison of A and B DSCTP image quality. Results: In DSCTP image quality, group A was better than group B, namely, cirrhosis, portal hypertension, bulky hepatocellular carcinoma or diffuse hepatocellular carcinoma and portal vein embolism. The portal vein imaging quality was poor. Conclusion: Hepatic disorders may affect the enhancement of portal vein or make the diameter of portal vein thinner, so that the imaging quality of spiral CT portal vein is decreased