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Plain chest x- ray is the first imaging modality for suspected tuberculosis patients because it is available, sensitive and inexpensive . The aim of this study was to identify the plain x- ray findings in sputum positive tuberculosis     patients .           One hundred and fourteen plain chest films of sputum positive tuberculosis patients that referred to health center of Rafsanjan were evaluated between 1988 and 1996 .           This investigation was a retrospective cross sectional study that showed 92% of the cases had positive radiographic findings and 8% had normal chest x- ray. The most commom radiographic findings was exudative (pneumonic) tubercolosis of lungs and other radiographic findings with decreasing frequency include: cavitation , fibro productive tuberculosis , pleural effusion, calcification, bronchopneumonia , atelectasis , lymphadenopathy bronchectasis and miliary tuberculosis.