Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate a mildly prominent cardiac silhouette likely accentuated by slightly low lung volumes . The descending aorta is unfolded . The lungs are clear with the exception of plate - like left basilar atelectasis versus pericardial fat pad . A small effusion can not be excluded in the left base . There is no pneumothorax or vascular congestion . Thoracolumbar spondylosis is present .
    OUTPUT:
    
Likely left basilar atelectasis . No definite acute cardiopulmonary process .