Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Minimal left basilar subsegmental atelectasis is grossly similar to the prior study . There is no focal consolidation , pleural effusion , pulmonary edema , or pneumothorax . The cardiomediastinal contour is normal . Moderate to severe degenerative changes of the right acromioclavicular joint are stable . Hyperexpansion of the lungs is unchanged .
    OUTPUT:
    
No acute cardiopulmonary process .