Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right internal jugular central venous catheter tip terminates in the mid SVC . Lung volumes are slightly low . Heart size is borderline enlarged . Mediastinal and hilar contours are unremarkable . There is mild crowding of bronchovascular structures without overt pulmonary edema . Patchy opacities in the lung bases likely reflect atelectasis in the setting of low lung volumes . No pleural effusion or pneumothorax is present . No acute osseous abnormality is detected .
    OUTPUT:
    
Low lung volumes with patchy opacities in the lung bases likely atelectasis .