Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest radiograph demonstrates stable positioning of the left PICC . Pulmonary edema has cleared significantly since ___ . However , there still is a moderate pleural effusion and opacification of the on the left lower lung . Mild cardiomegaly is stable . There is no pneumothorax .
    OUTPUT:
    
Significant improvement of pulmonary edema from ___ . Persistence of left lower lung opacification and pleural effusion makes infection most likely , given this patient 's history .