Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP frontal and lateral radiographs were obtained . These demonstrate clear lungs bilaterally with no focal consolidation . The patient is status post large paraesophageal hernia repair . A retrocardiac density within the left lower hemithorax may relate to prior paraesophageal repair . Heart size is normal . Significant atherosclerotic calcifications are identified within the aortic arch . Visualized osseous structures are without acute abnormality . No evidence of pneumothorax . There is no right - sided pleural effusion . Obscuration of the left hemidiaphragm is suggestive of a small pleural effusion .
    OUTPUT:
    
Left lower hemithorax retrocardiac density may related to recent paraesophageal hernia repair / paraesophageal hernia . Small left sided pleural effusion . No focal consolidation convincing for pneumonia .