Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size remains mildly enlarged . The aorta demonstrates diffuse mural calcifications . Moderate to large hiatal hernia is redemonstrated . There is mild interstitial pulmonary edema , which appears similar when compared to the prior study . Left basilar opacification appears slightly improved compared to the prior study , reflecting residual atelectasis . No pleural effusion or pneumothorax is identified . Compression deformities within the lower thoracic and upper lumbar spine appear unchanged when compared to the prior radiograph from ___ .
    OUTPUT:
    
Mild interstitial pulmonary edema . Moderate - to - large hiatal hernia with improved aeration of the left lung base , likely representing residual atelectasis .