Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is within normal limits . Mediastinal and hilar contours are unremarkable . The lungs are hyperinflated . There is no definite evidence of pneumonia or CHF . There is a focal opacity along the left heart border on the frontal view , likely a prominent fat pad . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic process .