Shimizu T, Narabayashi I, Aratake K, Uesugi Y, Yamamoto K, Tatsu Y, Sagami A, Ashina K, Maeda H, Matsui R
Department of Radiology, Osaka Medical College, Japan.
Radiat Med. 1994 May-Jun;12(3):99-104.
To evaluate the clinical usefulness of helical scanning CT for hepatocellular carcinoma, 39 patients were examined using a Toshiba CT system, the Xforce. Helical scanning CT data were acquired using up to 20 continuous 1.5-sec rotations, with contrast medium bolus injection of 100-150 ml at a rate of 1.5-3 ml/sec, and during a single breath-hold. Scanning was begun 35 to 50 sec after the start of injection. Helical scanning CT permits axial images to be reconstructed at any desired position within the scanned area, and provides images without interslice gaps caused by respiratory movement. Contrast enhanced helical scanning CT permits blood vessels to be clearly displayed following the bolus injection of contrast medium using an automatic injector. Furthermore, the shorter scanning time makes it possible to scan the target area in the desired vascular phase. In all 39 patients who were examined using contrast enhanced helical scanning CT, high-quality three-dimensional images were obtained. Such images were particularly useful for assessing the three-dimensional relationships among high density tumors and vascular structures. In conclusion, helical scanning CT was considered to be useful for hepatocellular carcinoma.
为评估螺旋扫描CT对肝细胞癌的临床应用价值，使用东芝Xforce CT系统对39例患者进行了检查。螺旋扫描CT数据采集采用多达20次连续1.5秒旋转，经自动注射器以1.5 - 3毫升/秒的速率团注100 - 150毫升造影剂，并在一次屏气期间完成。注射开始后35至50秒开始扫描。螺旋扫描CT允许在扫描区域内的任何所需位置重建轴向图像，并提供无呼吸运动导致的层间间隙的图像。对比增强螺旋扫描CT在使用自动注射器团注造影剂后能清晰显示血管。此外，较短的扫描时间使得在所需血管期扫描靶区域成为可能。在使用对比增强螺旋扫描CT检查的所有39例患者中，均获得了高质量的三维图像。此类图像对于评估高密度肿瘤与血管结构之间的三维关系特别有用。总之，螺旋扫描CT被认为对肝细胞癌有用。
