Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chin flexion obscures the medial lung apices . Calcified diaphragmatic and costal pleural plaques , most notable along the left costal pleura near the inferior angle of the left scapula , are unchanged . Streaky opacity at the left lung base suggest atelectasis . The lungs are otherwise clear . Mediastinal and hilar contours are stable . Heart size is normal .
    OUTPUT:
    
No evidence of active or latent pulmonary tuberculosis .