优化胃肠道肿瘤术后CT扫描方案对降低辐射剂量的意义  

Optimizing the CT Scanning Protocol of Postoperative Gastrointestinal Cancer to Reduce the Radiation Dose

作　　者：杜良国 黄博[1] 杜梁[1] 

机构地区：[1]汉川市人民医院放射科,湖北汉川430000

出　　处：《中国继续医学教育》2016年第35期62-63,共2页China Continuing Medical Education

摘　　要：目的分析胃肠道肿瘤术后优化CT扫描方式对辐射剂量的控制。方法 73例胃肠道肿瘤术后行CT复查,将图像分为CT平扫、单纯静脉期增强、单纯动脉期增强、平扫+双期增强扫描4组,比较4组扫描差异。结果平扫+双期增强扫描显示转移瘤17例,静脉期增强显示与平扫+双期增强扫描结果相一致;静脉期增强显示静脉曲张及淋巴结肿大的结果与平扫+双期增强相一致,单纯平扫或静脉期增强无法显示肝脏异常灌注,平扫及动脉期显示静脉曲张的漏诊率较高。结论胃肠道肿瘤术后实施CT扫描定期复查时,单纯静脉期增强扫描在发现低密度病变、高密度病变、混杂密度病变方面与多期增强扫描能力相当,且扫描的辐射剂量较低,更加适用于术后复查。Objective To analyze the effect of CT scan on the radiation dose in postoperative gastrointestinal cancer. Methods CT scan was performed in 73 patients with gastrointestinal tumor. CT scan, enhancement of venous phase, enhancement of arterial phase, and double-phase enhanced scan were performed in 4 groups. Results Plain and dual phase enhanced scan showed 17 cases of metastatic tumors, venous phase enhanced scan ＋ display and dual phase enhanced scan results consistent, venous phase enhancement showed varices and lymph node enlargement results with plain and dual phase enhanced scan is consistent, simple or vein enhancement cannot display liver perfusion, plain and varicose arteries showed high rate of missed diagnosis. Conclusion CT scan of gastrointestinal cancer after regular review, enhanced venous phase enhanced scan in the detection of low-density lesions, high-density lesions, mixed density lesions and multiphase enhancement scanning capacity, and scanning radiation dose is lower, more applicable after the review.

关 键 词：胃肠道肿瘤 CT扫描 优化方案 辐射剂量 

分 类 号：R144[医药卫生—公共卫生与预防医学]