We performed myocardial scan using 201TlCl and 99mTc-methoxy isobutyl isonitrile (99mTc-MIBI) in 16 patients of myocardial infarction and compared their diagnostic value. In view of image quality, 99mTc-MIBI scan was superior to 201Tl scan in 11 cases, and 201T1scan was superior in no case. There was no statistically significant difference between 99mTc-MIBI scan and201T1 scan in sensitivity (88.9% and 83.3%, respectively) and specificity (83.9% and 80.6%, respectively) . It is concluded that 99mTc-MIBI enables us to perform high quality myocardial scan and is clinically useful.
