Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were reviewed . Small bilateral pleural effusions have slightly decreased since ___ . Bilateral lower lobe atelectasis is minimal ; otherwise , the lungs are clear . There is no pnuemothorax . Mild cardiomegaly and aortic calcifications are unchanged . A right subclavian line is in the upper SVC , however , it s entire course is not visualized . A left pectoral pacer with leads ending in the right atrium and right ventricle is unchanged .
    OUTPUT:
    
Slight decrease in small bilateral pleural effusions since ___ .