[The early and delayed SPECT images of 123I-IMP and rCBF measurement].

The early and delayed SPECT images of 123I-IMP, and rCBF measurement were discussed in the diagnosis of ischemic cerebral vascular disorders (CVD). On early SPECT image of 123I-IMP in the CVD, the low perfusion area usually consists of three or four parts differing in severity. The regional blood flow (rCBF) of the area corresponding to the low density area, peri-low density area and normal density and low perfusion area on X-ray CT are 15 ml/100 g.brain/min, 34 ml/100 g.brain/min and 46 ml/100 g.brain/min, respectively. The redistribution phenomenon is frequently observed on delayed 123I-IMP SPECT images. This phenomenon is observed in the area in which rCBF is 25 to 35 ml/100 g.brain/min.