题目内容

患者男性,40岁,近4个月常感右下腹痛,伴间隙性腹泻,粪便呈糊状,无脓血便,食欲减退。查体:T37.5℃,消瘦,右下腹压痛(+),似可扪及边界欠清晰包块,杵状指。Hb89g/L,WBC12.5×10/L,ESR46mm/h,PPD试验:(-)。X线钡餐示回肠多处肠腔狭窄,边缘不整齐,病变之间肠曲正常。继以糖皮质激素和柳氮磺胺吡啶联合治疗。若行67Ga炎症显像,显像方法不正确的是()

A. 显像前无需肠道准备
B. 成人常用注射剂量为74~185MBq
C. 采集时,使用中能准直器,能峰93、184及296keV,窗宽20%
D. 注射后6~8小时及24小时显像,必要时加做48小时显像
E. 必要时行腹部断层显像

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