Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left basilar opacity has mildly improved . There is tiny left pleural effusion , stable . Right lung is clear . Pulmonary vascularity has improved . Heart size is at the upper limits of normal . No pneumothorax . Prominent main pulmonary artery , suggest pulmonary artery hypertension .
    OUTPUT:
    
Improved left basilar opacity . Decreased pulmonary vascularity .