Objective To evaluate US, CT and 99mTc-MIBI in the localization of hyperfunctioning parathyroid tumors. Methods Among the 47 patients with primary hyperparathyroidism 45 underwent ultrasound, 47 did CT scan and 36 did double phase imagings. Results Forty-six adenomas, 2 adenocarcinomas and 2 hyperplastic glands were removed from 47 patients. The results showed that the sensitivities were 43%,78%,92% for B-utrasound; CT and isotope imaing respectively.The specificities were 96%,97%,100%;and the accuracies were 82%,92%,98%. There was significant difference between 99mTc- MIBI and CT (? 2=6.627,? 2=4.884,P
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