Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle patchy opacity along the left heart border on the frontal view , not substantiated on the lateral view , may be due to atelectasis / scarring or epicardial fat pad , less likely consolidation . No focal consolidation seen elsewhere . There is no pleural effusion or pneumothorax . Cardiac and mediastinal silhouettes are stable . Hilar contours are stable . No overt pulmonary edema is seen . Chronic changes at the right acromioclavicular joint are not well assessed .
    OUTPUT:
    
Subtle patchy opacity along the left heart border on the frontal view , not substantiated on the lateral view , may be due to atelectasis / scarring or epicardial fat pad , less likely consolidation .