Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a new right lower lobe heterogeneous opacity compared to radiographs from ___ , concerning for pneumonia . Lung volumes are slightly low , but otherwise clear . There may be a tiny right pleural effusion . No pneumothorax is seen . The cardiac and mediastinal contours are normal . A ventriculoperitoneal shunt is seen overlying the right chest wall .
    OUTPUT:
    
1 . Right lower lobe heterogeneous opacity is either pneumonia or aspiration pneumonitis . Clinical correlation recommended . 2 . Possible tiny right pleural effusion .