Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior radiographs , again noted is moderate cardiomegaly . The mediastinal contour is unchanged since prior examinations . Again seen is a large hiatal hernia . No definite consolidation is noted . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
No acute intrathoracic process .