Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Despite low lung volumes , the lungs appear clear . No large effusion or pneumothorax . No convincing signs of edema . Cardiomediastinal silhouette is stable with mild cardiomegaly in an unfolded thoracic aorta . Bony structures are intact .
    OUTPUT:
    
No acute findings .