Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . Previous heterogeneous opacity in the left lung has resolved , and substantially cleared from the right lower lung . However , there is a small round opacity at the lateral right lung base . Compared to prior study , patient is slightly rotated to the left and this opacity may conform to a similar finding on the previous film . It is unclear whether this is a nodule or residual opacity from prior pneumonia . The cardiac , mediastinal , and hilar contours are normal . There are no pleural effusions .
    OUTPUT:
    
Previous pneumonia has almost entirely resolved . Repeat chest radiographs in four weeks indicated for to distinguish possible right lower lobe nodule from residual pneumonia . Radiologist should review images before patient leaves the department to see if oblique views are needed .