Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest PA and lateral radiograph demonstrates unremarkable mediastinal , hilar , and cardiac contours . There may be minimal left base atelectasis . No focal consolidation is seeen . No pleural effusion or pneumothorax evident .
    OUTPUT:
    
Possible minimal left base atelectasis . Otherwise , no acute cardiopulmonary process .