Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild - to - moderate cardiomegaly , pulmonary interstitial edema and small bilateral pleural effusions suggestive of congestive heart failure changes is unchanged since ___ . Concurrently associated pneumonia , however , can not be ruled out , required attention on followup radiographs . Increased retrocardiac density reflects left lower lung atelectasis . Mediastinal and hilar contours have been stable . Aorta is generally tortuous but without evidence of aneurysmal widening .
    OUTPUT:
    
Congestive heart failure changes and bilateral lower lung atelectasis unchanged since ___ . Any element of concurrent pneumonia can not be ruled out , should be followed up on the radiographs .