Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is stable mild elevation of the left hemidiaphragm . Obscuration of the medial left hemidiaphragm is likely due to subsegmental atelectasis , which is unchanged from the prior exam . The remainder of the lungs are clear . There is no pneumothorax . The heart appears enlarged despite the projection . The regional bones are diffusely osteopenic .
    OUTPUT:
    
Unchanged left lung base subsegmental atelectasis with otherwise clear lungs . Stable cardiomegaly .