Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were reviewed and compared to the most recent preceding study of ___ . Elevation of the left hemidiaphragmatic contour has decreased ; however , the contour could represent an elevated hemidiaphragm or a subpulmonic effusion . Lung volumes have increased since ___ and the lungs are clear without evidence of pulmonary edema , vascular congestion , pleural effusion or pneumothorax . Mild cardiomegaly and the mediastinal contours are unchanged . Compression fractures in the lower thoracic vertebral bodies are unchanged since ___ .
    OUTPUT:
    
1 . Elevation of the left hemidiaphragmatic contour has slightly decreased since ___ ; however , remaining contour elevation could represent a subpulmonic effusion or hemidiaphragmatic elevation . Left lateral decubitus radiographs are recommended if differentiation between these entities is clinically warranted . 2 . No radiographic evidence of pneumonia or congestive heart failure .