Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a tortuous thoracic aorta . There are low lung volumes . Allowing for changes due to this , the cardiac silhouette is within normal limits . The bilateral hila are unremarkable . Minimal interstitial prominence likely relates to crowding of bronchovascular structures . A rounded , 3 mm calcific density focus projecting over the lateral left hemithorax may represent a calcified granuloma . There is no evidence of pneumothorax or pleural effusion , however note the right lung apex is obscured by the patient 's skull .
    OUTPUT:
    
No acute cardiopulmonary process . Limited x-ray due low lung volumes and patient positioning .