Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Semi-upright portable AP view of the chest provided . Dialysis catheter is again seen with its tip residing in the region of the right atrium . The heart is unchanged in size and appears moderately enlarged . There is no evidence of pneumonia or pulmonary edema . No effusion or pneumothorax is seen . The bony structures are intact . There is no free air below the right hemidiaphragm .
    OUTPUT:
    
Stable moderate cardiomegaly . No evidence of pulmonary edema or pneumonia .