螺旋CT仿真膀胱镜的临床应用价值  

Helical CT Virtual Cystoscopy:the Clinical Applications and Limitations

作　　者：王东[1] 张挽时[1] 熊明辉[1] 喻敏[1] 徐家兴[1] 

机构地区：[1]解放军空军总医院CT室,北京100036

出　　处：《实用放射学杂志》2003年第6期550-553,共4页Journal of Practical Radiology

摘　　要：目的　探讨螺旋CT仿真膀胱镜 (CTVC)的临床应用价值及限度。方法　 3 6例临床怀疑膀胱病变的患者 ,都经纤维膀胱镜检查 ,并有病理证实。应用螺旋CT采集排泄期的图像做CTVC成像 ,双盲法与轴位、纤维膀胱镜所见对照分析。结果　CTVC能清楚地显示膀胱腔内的各种正常解剖结构 ,8例正常膀胱中 7例可见 11侧输尿管开口 ;CTVC对膀胱腔内病变的部位、大小、数目、形态及侵犯范围的显示均与纤维膀胱镜基本一致 ;膀胱癌的检出率为 94.7% ,2个 <5mm的肿瘤CTVC显示清楚 ,而轴位图像未显示 ;CTVC检测膀胱壁增厚及膀胱外侵犯的状况不如轴位和MPR图像 ,CTVC上假性病灶 1例。结论　CTVC对膀胱病变的显示和诊断是一种较可靠的、非侵袭性的方法 ,但需要膀胱内造影剂充盈良好 ,且必须结合轴位和MPR图像才能对膀胱病变做出全面、准确的评价。Objective To evaluate the clinical applications and limitations of helical CT virtual cystoscopy (CTVC).Methods CTVC was performed in 36 patients suspected bladder diseases, all cases were confirmed by conventional cystoscopy and pathology. CTVC images were generated from the volumetric data of the excretory phase using helical CT. The results were then compared with the findings of axial images and conventional cystoscopy in a double-blinded manner. Results CTVC could clearly display the normal anatomic structures of bladder, 11 ureteric orifices were visualized at CTVC in 7 of 8 normal bladders. The location, size, numbers, configuration and extension of lesions showed on CTVC were corresponded well with that of conventional cystoscopy. The sensitivity to vesical carcinoma was 94.7%,2 tumors smaller than 5 mm depicted on CTVC images were not seen on the axial images, whereas areas of wall thickening and extravesical invasions were more readily appreciated on axial and MPR images. There was 1 false lesions detected on CTVC images. Conclusion CTVC has proved to be a noninvasive and reliable technique in the detection and diagnosis of bladder lesions, but the optimal evaluation requires adequate bladder filling with contrast medium, and should combine with the interpretation of axial and MPR images.

关 键 词：螺旋CT仿真膀胱镜 临床应用 膀胱病变 纤维膀胱镜 解剖结构 

分 类 号：R814.42[医药卫生—影像医学与核医学] R694[医药卫生—放射医学]