Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Marked cardiomegaly is again noted streaky retrocardiac opacity likely reflect scarring or atelectasis . No large effusion or pneumothorax . The thoracic aorta is mildly unfolded . No evidence of edema . Bony structures are intact with multilevel degenerative changes in the T - spine .
    OUTPUT:
    
Marked cardiomegaly . No pleural effusion . Mild retrocardiac atelectasis versus scarring .