Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest . Per the radiology technologist , this is the best possible film , the patient can not keep chin up . Left - sided pacer device is stable in position . There is a stable prominent ovoid calcification projecting over the left mediastinal border . Perihilar haziness is again seen , which may be due to a mild pulmonary edema or in part related to underpenetration from overlying patient 's soft tissue . The cardiac and mediastinal silhouettes are stable . No definite large pleural effusion is seen .
    OUTPUT:
    
Overall , the appearance of the lungs has not significantly changed . If anything , pulmonary edema appears slightly decreased as compared to the prior study .