Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Subtle opacity adjacent to the left heart border likely represents bronchovascular markings . No convincing signs of pneumonia . There is no pleural effusion or pneumothorax . No edema . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
No acute intrathoracic process .