Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine chest radiograph demonstrates low lung volumes , likely related to technique . There is retrocardiac opacity . The pulmonary vasculature is engorged . The cardiac silhouette is normal in size . The hila appear prominent , but unchanged . The mediastinal contours are otherwise grossly unremarkable .
    OUTPUT:
    
Limited chest radiograph demonstrates pulmonary vascular engorgement and patchy retrocardiac opacity . The possibility of mild CHF and / or a left lower lobe pneumonic infiltrate can not be excluded . If clinically indcated , PA and lateral chest radiographs could help to better assess for a left lower lobe pneumonia .