Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph provided . Patient is known to have a eventration of the right anterior hemidiaphragm . Which is overall unchanged in appearance . The lungs remain clear . Heart size is stable . Mediastinal contour is normal . No pneumothorax or definite pleural effusion is seen . The imaged osseous structures are intact .
    OUTPUT:
    
No acute intrathoracic process . Stable eventration of the right hemidiaphragm .