[Roentgenological diagnosis of pulmonary mycobacteriosis]

For appropriate approach to diagnosis of pulmonary tuberculosis, it is necessary to understand the pathological processes from primary infection and acquisition of cellular immunity to reactivation, progression and cure of the tuberculous lesions. The outlines for roentgenological diagnosis are reviewed, which are the process of primary infection and cure after acquisition of cellular immunity, the process of reactivation and progress of postprimary pulmonary tuberculosis, and roentgenological characteristics of primary and postprimary pulmonary tuberculosis. The outlines of roentgenological aspects of pulmonary mycobacteriosis due to M. avium complex and M. kansasii are reviewed, which are increasing in Japan.