Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are poorly expanded , accounting for some vascular crowding . A triangular opacity in the right costophrenic angle is likely a combination of vascular crwoding and transient atelectasis as a subsequent CT did not show abnormality in this region . Cardiomediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute cardiopulmonary process .