Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right PICC ends in the right atrium . Markedly low lung volumes , bibasilar atelectasis , pulmonary edema and moderate cardiomegaly are unchanged . No pneumothorax is identified .
    OUTPUT:
    
The right PICC ends in the right atrium . For positioning at the cavoatrial junction retraction of 2 cm is recommended .