Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Even allowing for the AP technique and low lung volumes , the heart is probably mildly enlarged . A right subclavian central venous catheter is in the proximal SVC . Bibasilar opacities likely represent atelectasis . There is no focal consolidation , pleural effusion , or pneumothorax .
    OUTPUT:
    
1 . Low lung volumes and mild cardiomegaly . 2 . No evidence of pulmonary edema or pneumonia . 3 . Central venous catheter terminates in the proximal SVC .