Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low leading to crowding of the bronchovascular structures . In addition to a background interstitial abnormality , there is mild vascular congestion and edema . Probable small left pleural effusion . The right apex appears asymmetrically opacified relative to the left . No or pneumothorax is identified . The heart is moderately enlarged .
    OUTPUT:
    
1 . Low lung volumes with moderate cardiomegaly and mild to moderate pulmonary vascular congestion . 2 . Asymmetric opacity in the right apex , which may represent a pneumonia or potentially a mass . Recommend PA and lateral radiographs or , if the patient is unable to tolerate such in exam , a Chest CT for further evaluation .