Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are quite low , accentuating the heart and mediastinal size , and causing crowding of the pulmonary vasculature . The lungs are grossly clear , with no pneumothorax , pleural effusion , overt pulmonary edema , or focal consolidation . No acute osseous abnormalities are detected .
    OUTPUT:
    
1 . Low lung volumes likely account for accentuated heart size . 2 . Otherwise , no acute cardiopulmonary process .