Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest AP and lateral radiograph demonstrates normal cardiomediastinal and hilar contours . Lung volumes are somewhat decreased compared to prior study , giving the appearance of prominent pulmonary vasculature , though this likely represents crowding . No overt pulmonary edema identified . Minimal atelectasis present in the bilateral lower lungs . No pleural effusion identified . Sternotomy sutures are midline and intact . No fracture is identified .
    OUTPUT:
    
No acute intrathoracic process . No cardiomegaly or pneumothorax evident .