Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A moderate size left pleural effusion persists , similar compared to the prior study . Left basilar consolidation has improved since then , but a small amount hazy opacification persists . The right lung is grossly clear . Moderate cardiomegaly is stable . There is no pneumothorax or overt pulmonary edema . A left chest wall pulse generator device is unchanged in position , with leads terminating in the right atrium and right ventricle .
    OUTPUT:
    
1 . Improved left basilar consolidation , likely atelectasis , although underlying infectious process can not be completely excluded . 2 . Moderate left pleural effusion and moderate cardiomegaly persist .