Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . A previously seen right lower lobe opacity has resolved in the interval . Obscuration of the right hemidiaphragm margin may be secondary to a combination of small pleural effusion with associated right basilar fibrosis / atelectasis . No focal opacities concerning for pneumonia are seen . Moderate cardiomegaly is unchanged . There is no pneumothorax . Sternotomy wires are intact . Prosthetic aortic valve is better seen in the lateral view .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . Minimal right - sided pleural effusion with associated atelectasis and stable moderate cardiomegaly is identified .