Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Right - sided VP shunt is again seen , coursing over the right hemithorax . Lung volumes remain low and there is minimal interstitial edema , slightly improved as compared to the prior study . No definite focal consolidation is seen . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are grossly stable given differences in technique and patient position .
    OUTPUT:
    
Low lung volumes again seen . Mild interstitial edema , improved since the prior .