Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are somewhat low in volume but appear clear . No focal consolidation , pleural effusion or pneumothorax is seen . Eventration of the right hemidiaphragm is unchanged . Cardiac size is normal with normal cardiomediastinal contours aside from calcification noted in the aortic arch . Sternotomy wires are intact , with surgical clips suggesting prior CABG . Bones are somewhat osteopenic with degenerative changes in the spine and incompletely imaged right humeral plate and screw fixation .
    OUTPUT:
    
No acute intrathoracic process .