Tamura S, Kodama T, Kihara Y, Yuki Y, Uwada O, Samejima M, Watanabe K
Department of Radiology, Miyazaki Medical College, Japan.
Eur J Radiol. 1992 Oct;15(3):215-9. doi: 10.1016/0720-048x(92)90110-u.
Right anterior caudocranial oblique (RACCO) projections were evaluated for transarterial portography with digital subtraction angiography. For RACCO projection, the image intensifier was tilted 25 degrees caudally and 30 degrees to the patient's right with the patient in the supine position. The abnormal findings imaged in 20 patients were analyzed by types of abnormalities and their locations in the portal venous systems by comparing RACCO and PA projections. The RACCO view was superior to the PA projection for demonstrating either encasements or tumor thrombi in relatively proximal segments of the portal venous branches. Two encasement lesions and a tumor thrombus were imaged only on the RACCO projection. However, the RACCO projection had no definite advantage over the PA view for showing encasements or tumor thrombi in the distal segmental branches. The RACCO projection was superior to the PA view for demonstrating defects in the hepatograms of some hepatic segments (S5 and S8). We concluded that the RACCO view is extremely useful and is indicated for angiographic work-ups of hepatic or biliary lesions when abnormalities are suspected in proximal portal venous branches.
对经动脉门静脉造影的右前尾颅斜位（RACCO）投照进行了数字减影血管造影评估。对于RACCO投照，患者仰卧位时，影像增强器向尾侧倾斜25度并向患者右侧倾斜30度。通过比较RACCO和前后位（PA）投照，对20例患者成像的异常表现按门静脉系统异常类型及其位置进行了分析。在显示门静脉分支相对近端节段的包绕或肿瘤血栓方面，RACCO位优于PA投照。2例包绕性病变和1个肿瘤血栓仅在RACCO投照上成像。然而，在显示远端节段分支的包绕或肿瘤血栓方面，RACCO投照相对于PA位并无明确优势。在显示部分肝段（S5和S8）肝造影片的缺损方面，RACCO投照优于PA位。我们得出结论，当怀疑近端门静脉分支存在异常时，RACCO位对于肝脏或胆管病变的血管造影检查极为有用且是必要的。
