摘要
目的：探讨合理的螺旋ＣＴ血管造影（ｓｐｉｒａｌＣＴａｎｇｉｏｇｒａｐｈｙ，ＳＣＴＡ）技术，扩大其临床应用范围，并对其临床价值作一初步评估。材料与方法：３０例ＳＣＴＡ检查分为三组：血管性病变、肿瘤与邻近血管关系、门静脉系统成像。扫描技术和造影剂参数按受检部位、范围和病变性质具体设置。三维重建采用最大强度投影（ＭＩＰ）或（和）表面成像显示（ＳＳＤ）。结果：合适的扫描和增强技术可获得良好的血管成像，能可靠地显示血管形态和病变，如动脉狭窄、动脉瘤等；术前准确评估肿瘤与邻近血管关系：推移、压迫、包绕或浸润。外周静脉注射造影剂，门静脉结构和分布可充分显示，有利于肝癌、胰腺癌的术前可切除性评估和术中导向，ＴＩＰＳ空间定位、门静脉或肠系膜静脉与下腔静脉分流术后通畅性评估。结论：ＳＣＴＡ是有效的无创伤性血管成像术，可弥补横断面ＣＴ和ＭＲＡ的不足，在某种程度上可替代创伤性的血管造影（或ＤＳＡ）。
Purpose: To optimize spiral CT angiography (SCTA) technique and to widen the range of its clinical applicability. Materials and methods: Thirty patients with SCTA were divided into three groups: vascular diseases, relationship of tumor to adjacent vessels, imaging of portal vein system. Contrast material was injected intravenously with a power injector via the antecubital vein. The bolus timing, injective rate, the delay time and the scanning technique varied with the type of study location of the lesions and the scanning range. MIP and SSD reconstruction were used as three dimensional models. Results: High quality vascular images could be obtained by optimizing scanning technique and contrast agent administration. The 3D presentation could clearly display the vascular anatomy, its pathological conditions including artery stenosis, aortic aneurysm. Also, the 3D images could accurately depict and evaluate relationship of tumor to vessels such as pad effect, encasement and involvement. Even with peripheral injection of contrast agent, the portal venous system could also be demonstrated effectively with this technique providing the surgeon with information about resectability and a “road map” for planning the hepatic and pancreatic tumor operation. These views could also provide a 3D map of the hepatic venous and intrahepatic portal venous system to allow planning of transjugular intrahepatic portal systemic shunt (TIPSS) procedure and confirm the patency of portacaval and mesocaval shunts postoperatively. Conclusion: Spiral CT angiography was found to be a noninvasive fast and effective method to image complex vascular structures, and to compensate for the limitation of conventional CT and MRI. To some extent, the technique can be as an alternative to DSA.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
1997年第2期96-100,共5页
Chinese Journal of Radiology
关键词
CT
血管造影
图像处理
三维重建
Tomography, X ray computed Angiography Image processing, computer assisted
