Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . The heart is mildly enlarged . Lung volumes are low . There is mild basal atelectasis without definite signs of pneumonia or edema . No large effusion or pneumothorax is seen . The mediastinal contour appears normal . Imaged bony structures are intact .
    OUTPUT:
    
Mild cardiomegaly , mild basal atelectasis , otherwise unremarkable .