Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided PIC line terminates in the cavoatrial junction . Overall , there has been slight interval improvement in the moderate pulmonary edema on a background of diffuse opacities concerning for an infectious process . Moderate cardiomegaly is persistent . There may be a small left pleural effusion . There is no evidence of pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
Slight interval improvement of moderate pulmonary edema on a background of parenchymal opacities which may be secondary to an infectious process as characterized by recent CT performed on ___ .