Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung bases a relatively under penetrated due to overlying soft tissue . There are low lung volumes . Given the above , patchy medial right basilar opacity most likely reflects overlap of vascular structures or possibly atelectasis . No pleural effusion is seen . There is evidence of pneumothorax . The cardiac silhouette is top - normal . Mediastinal contours are grossly unremarkable . There is no pulmonary edema .
    OUTPUT:
    
Low lung volumes . Somewhat under penetrated due to body habitus . Given the above , subtle medial right base opacity most likely reflects overlap of vascular structures or possibly atelectasis , with aspiration or infection felt less likely .