Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pulmonary edema has improved since the prior exam . Diffusely nodular appearance of the lungs may represent vessels on end . There is a small residual right pleural effusion with adjacent atelectasis . No pneumothorax . Mild cardiomegaly mediastinal contours are stable . Left PICC extends to at least the left brachiocephalic vein but its tip is not well identified .
    OUTPUT:
    
1 . Interval improvement of pulmonary edema . Multiple apparent nodules may represent vessels on end and if this appearance does not improve on subsequent radiographs , dedicated chest CT may be obtained . 2 . Small residual right pleural effusion . 3 . Left PICC extends to at least the left brachiocephalic vein , but its tip is not well identified .