Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Assessment is slightly limited by low lung volumes and rotation of the patient . Heart size appears mildly enlarged . Mediastinal contours unremarkable . Crowding of bronchovascular structures is present without overt pulmonary edema . Hilar contours are grossly unremarkable . Focal opacity is demonstrated within the medial right lung base which may reflect an area of atelectasis , but aspiration is not excluded . No pleural effusion or pneumothorax is present . No subdiaphragmatic free air is identified . There are no acute osseous abnormalities . Gaseous distention of bowel loops are seen in the left upper quadrant .
    OUTPUT:
    
Limited exam due to patient rotation and low lung volumes . Focal right medial lung base opacity which may reflect an area of atelectasis , but aspiration is not excluded . No subdiaphragmatic free air or evidence for left pleural effusion .