CT与常规X线体层摄影比较,最主要的不同是() ["采用激光机拍照","无层面外组织结构干扰重叠","X线辐射剂量较小","可使用对比剂增加","病人摆位置较简便"]
适于行X线钡餐造影检查的疾病有() ["胃穿孔","肠穿孔","肠梗阻","2周内有肠道大出血者","以上都不是"]
虱传回归热发热的热型呈() ["弛张热","双峰热","低热","间歇热","稽留热"]
男性,68岁,反复发作性胸骨后压迫性疼痛2年,每次持续约10分钟,最有价值的检查是() ["动态心电图","心肌核素显像","活动平板","冠状动脉造影","胸部CT"]
图像未发现扫描层面外病灶,原因是() ["密度分辨率高","空间分辨率高","无层面外结构干扰","灰阶范围小","矩阵大"]
备用泵日常维护有那些?