[en] This study examined 40 patients: 34 have pulmonary tuberculosis, 3 have pneumonitis, 2 have lung cancer, and one has bilharziasis. All patients have been imaged using radioisotopes compounds (99mTc-infecton and 99mTcHIG) and after 1 hour and 4 hours of patients injection.Using 99mTc-infecton gave positive results in 30 pulmonary tuberculosis patients out of 34, the 3 pneumonitis patients, while using 99mTcHIG gave positive results in 27 pulmonary tuberculosis patients including the 3 pneumonitis patients. Both 99mTc-infecton and 99mTcHIG gave negative results with the lung cancer patients and unreal positive results with the bilharziasis patient. It has been found that the sensitivity and accuracy in the examinations using 99mTc-infecton were 88%, 93%, and 85.7% respectively in comparison with using 99mTcHIG where the values were 70.6%, 91%, and 68.5% respectively. Continuing examination and monitoring of 18 tuberculosis patients for 2-18 months with anti-pulmonary tuberculosis treatment, showed complete response of 12 patients using 99mTc-infecton, and 8 by using 99mTcHIG. As a result, 99mTc-infecton can be used for examining pulmonary tuberculosis patients