67Ga tumor scintigraphy was attempted in a hamster, using a pinhole collimator improved for small animal scintigraphy, to examine whether DMBA induced experimental cheek pouch carcinoma could be demonstrated or not. The spot scan maxillofacial images cleary showed the fine uptakes of67Ga in the carcinoma lesions. The results obtained from this modality could be apllied in the experimental studies on DMBA induced cheeck pouch carcinomas, and that the most desirable images were obtained under the condition of exposure 400, distance 0 cm and counts 400 kc.
Myocardial SPECT imaging using123I-MIBG was performed in 29 patients with cardiac disorders and compared with the results of201Tl SPECT imaging. The areas with decreased uptake of123I-MIBG was usually more extended than those observed with201Tl SPECT, which was more prominent in the delayed scan than in the early scan. In the 2 patients out of 4 with hypertrophic cardiomyopathy, the distribution of123I-MIBG and201Tl was not matched. Namely, high uptake of123I-MIBG was observed in the regions with low201Tl uptake. The washout rate for123I-MIBG was higher in the region with decreased myocardial wall motion than those with preserved wall motion.