Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The appearance of the lungs is distorted by marked kyphosis of the thoracic spine . The heart is moderately enlarged , stable . Moderate size hiatal hernia with air - fluid level is seen . Opacification at the left lung base is likely a function of technique and patient positioning , rather than true pathology . No evidence of pneumonia or pleural effusion .
    OUTPUT:
    
1 . Moderate hiatal hernia . 2 . Moderate cardiomegaly , stable . 3 . No pulmonary edema or pneumonia .