肿瘤骨转移往往在无骨痛症状时已经发生,好发部位为胸部、脊柱、骨盆。通过ＳＰＥＣＴ骨显像可比Ｘ线早3～6个月显示病灶〔1〕,核素在膀胱内蓄积影响盆内结构的观察,给诊断造成困难。我们运用改变采集方位、排尿或导尿、窗/阈调节方法取得满意效果。报告如下。一、资料与方法我 Tumor metastasis often occurs when there are no symptoms of bone pain. The predominant sites are the chest, spine, and pelvis. The SPECT bone imaging can display lesions 3 to 6 months earlier than X-rays. The accumulation of nuclide in the bladder affects the observation of the internal structure of the basin, which makes diagnosis difficult. We achieved satisfactory results by changing the acquisition position, urination or catheterization, and window/threshold adjustment methods. The report is as follows. I. Information and Methods I