Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to severe cardiomegaly is unchanged . There is mild interstitial pulmonary edema , slightly improved compared to the most recent chest radiograph . Aorta is tortuous and calcified at the aortic knob . Mediastinal and hilar contours are otherwise unchanged . No focal consolidation , large pleural effusion or pneumothorax is present . Mild degenerative changes are noted in the thoracic spine . An electronic device projects over the left chest wall .
    OUTPUT:
    
Mild interstitial pulmonary edema , slightly improved in the interval .