Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low leading to crowding of the bronchovascular structures . Probable left retrocardiac airspace opacity is noted . Left basilar atelectasis is present . No large pneumothorax or pleural effusion . Mild pulmonary edema may be present , though difficult to evaluate given the patient body habitus . Moderate cardiomegaly is present .
    OUTPUT:
    
1 . Low lung volumes and limited examination secondary to patient body habitus . Within this limitation , a left retrocardiac airspace opacity may represent pneumonia in the appropriate clinical setting . 2 . Moderate cardiomegaly and likely mild pulmonary vascular congestion / edema .