Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate low lung volumes with top normal heart size . A pulse generator is present in the left chest wall , with pacing leads terminating in the right atrium and right ventricle . There is no pneumothorax , pleural effusion , pulmonary edema , or focal airspace opacity . Mild pleural thickening or scarring is noted on the right .
    OUTPUT:
    
Top normal heart size . No acute cardiopulmonary process .