Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate cardiomegaly appears relatively unchanged compared to the previous study . The aorta is mildly tortuous . The mediastinal and hilar contours are unchanged . Mild interstitial pulmonary edema persists , but is slightly improved compared to the previous radiograph . Small amount of fluid is seen within the fissures , but no large pleural effusion is present . No pneumothorax is identified . There are moderate multilevel degenerative changes noted in the thoracic spine . Again noted is a high riding right humeral head suggestive of underlying rotator cuff disease .
    OUTPUT:
    
Mild interstitial pulmonary edema , slightly improved compared to the previous radiograph .