Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal radiograph of the chest demonstrates obscuration of the left hemidiaphragm which may be due to left lower lobe atelectasis and volume loss or could also represent a retrocardiac consolidation . The right lung is grossly clear . The previously seen dialysis catheter is unchanged in position , terminating in the right atrium . There is no evidence of pulmonary edema , pneumothorax or large pleural effusion .
    OUTPUT:
    
Obscuration of the left hemidiaphragm may represent left lower lobe atelectasis with volume loss or a retrocardiac consolidation . Lateral views would be helpful in resolving this finding .