Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . Heart size , thoracic aorta and mediastinal structures are unchanged . Pulmonary vasculature is not congested . No new acute infiltrates identified . Comparison with the preceding study again demonstrates again the previously identified hazy density in the mid lung field on the right side , projecting over the posterior portion of the right - sided eighth rib on the frontal view . This density is difficult to identify on the lateral view conclusively . No other new abnormalities can be identified on the PA and lateral chest examination . Review is extended to the next preceding chest examination of ___ and it is noted that no suspicious density could be identified at that time .
    OUTPUT:
    
The subtle right - sided density has not undergone any significant interval change since the next preceding study of ___ . Considering patient 's age and history , evaluation with CT is recommended .