PURPOSE: The purpose of our study was to determine evolutive patterns and signs of active tuberculosis on high resolution CT (HRCT) scans. METHOD: We followed up over 15 months 27 patients with postprimary pulmonary tuberculosis that was proven bacteriologically. CT scans were performed before, during, and after 6 months of anti-tuberculosis treatment. Both 10-mm-thick sections and 1.5-mm-thick HRCT scans were performed. RESULTS: Ground-glass pattern was noticed 26 times, 9 times after 2 month treatment and only 2 times after 6 month treatment. Among these two patients, one did not undergo his treatment properly and the other one had an additional bacterial infection. Centrilobular nodules (n = 17) and poorly marginated nodules (n = 21) were present only before treatment. Reticular pattern (intralobular and septal thickening), interstitial nodules, and fibrosis were seen both before and after treatment. Ground-glass pattern, poorly marginated nodules, and infiltrates as well as centrilobular nodules were related to an active infection. CONCLUSION: This HRCT may be helpful to demonstrate activity in patients suspected of having tuberculosis and to assess antituberculous treatment efficiency.
PURPOSE: The purpose of our study was to determine evolutive patterns and signs of active tuberculosis on high resolution CT (HRCT) scans. METHOD: We followed up over 15 months 27 patients with postprimary pulmonary tuberculosis that was proven bacteriologically. CT scans were performed before, during, and after 6 months of anti-tuberculosis treatment. Both 10-mm-thick sections and 1.5-mm-thick HRCT scans were performed. RESULTS: Ground-glass pattern was noticed 26 times, 9 times after 2 month treatment and only 2 times after 6 month treatment. Among these two patients, one did not undergo his treatment properly and the other one had an additional bacterial infection. Centrilobular nodules (n = 17) and poorly marginated nodules (n = 21) were present only before treatment. Reticular pattern (intralobular and septal thickening), interstitial nodules, and fibrosis were seen both before and after treatment. Ground-glass pattern, poorly marginated nodules, and infiltrates as well as centrilobular nodules were related to an active infection. CONCLUSION: This HRCT may be helpful to demonstrate activity in patients suspected of having tuberculosis and to assess antituberculous treatment efficiency.
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