Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . There is subtle density overlying the left lower lung which likely corresponds with mildly prominent breast tissue . There is no convincing sign of pneumonia or CHF . No effusion or pneumothorax . Cardiomediastinal silhouette is normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No convincing signs of pneumonia or other acute intrathoracic process .