Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to ___ , there is improvement in bilateral vascular congestion . There is also improvement in the right upper lobe opacity . The left PICC tip is seen to be in the upper SVC . Stable retrocardiac opacity . Cardiac size is enlarged and unchanged . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Mild improvement in bilateral vascular congestion and right upper lobe opacity . Stable retrocardiac opacity . Left PICC tip in upper SVC .