Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Linear densities in the lower lungs likely represent subsegmental atelectasis . The heart is top normal in size . There is slight elevation of the right hemidiaphragm which is similar to prior exam . No signs of pneumonia or CHF . Mediastinal contour is normal . No pneumothorax or pleural effusion . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No signs of CHF or pneumonia .