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[目的]探讨胃肠道间质瘤的CT特点及血供对胃肠道间质瘤的诊断价值。[方法]回顾性分析29例经手术及病理证实的胃肠道间质瘤病例的CT特点,结合CT血管重建技术,进行肿瘤血供的研究。CT扫描采用快速薄层扫描,螺距15:16,层距、层厚均1mm,原始数据传输至CT工作站进行三维重组,重组方法包括容积再现(VR)、多平面重建(MPR)及CT血管成像(CTA)。[结果]胃肠道间质瘤大多呈圆形或椭圆形,边缘光整。胃间质瘤平均直径约3cm,小肠及其它间质瘤平均直径约4.5cm。大多数肿瘤呈不均匀明显强化,静脉期呈持续强化,CT增强的强化值平均增加33Hu。CTA对肿瘤血供显示率为72.41%,胃间质瘤血供基本上来自胃左及胃十二指肠动脉,小肠间质瘤血供基本上来自肠系膜上及下动脉。[结论]多层螺旋CT及CTA对胃肠道间质瘤的诊断及判断肿瘤的来源有一定价值。
[Objective] To investigate the CT features of gastrointestinal stromal tumors and the diagnostic value of blood supply for gastrointestinal stromal tumors. [Methods] CT features of 29 cases of gastrointestinal stromal tumors confirmed by surgery and pathology were retrospectively analyzed. Tumor blood supply was studied with CT angiography. The CT scan was performed by rapid thin-layer scanning with a pitch of 15:16, a layer distance of 1 mm and a layer thickness of 1 mm. The original data was transmitted to a CT workstation for three-dimensional reconstruction. The reconstruction methods included volume rendering (VR), multiplanar reconstruction (MPR) and CT angiography (CTA). [Results] Most of gastrointestinal stromal tumors were round or oval with edge finishing. Gastric stromal tumors with an average diameter of about 3cm, small intestine and other stromal tumors with an average diameter of about 4.5cm. Most of the tumor was unevenly enhanced significantly enhanced venous phase showed a continuous enhancement of enhanced CT value increased 33Hu. The blood supply of CTA was 72.41%. The blood supply of gastric stromal tumors basically came from the left gastric and gastroduodenal arteries. The blood supply of small intestinal stromal tumors was basically from the superior mesenteric artery. [Conclusion] MSCT and CTA have some value in the diagnosis of gastrointestinal stromal tumors and the source of tumors.