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 PA and lateral chest examination of ___ . Heart size remains normal . No configurational abnormality is seen . Thoracic aorta unremarkable . The pulmonary vasculature again does not demonstrate any congestive pattern and the lateral and posterior pleural sinuses are free from any fluid accumulation . No pneumothorax is present in the apical area on the frontal view . In comparison with the next preceding chest examination the at that time visible pulmonary abnormalities seen in the right upper lobe area laterally and in contact with the pleura as well as similar changes in the left base have clearly regressed . No new parenchymal abnormalities are present . No remaining abnormality at the site of the previously performed wedge resection in the right upper lobe area .
    OUTPUT:
    
Marked improvement of previously identified multiple scattered nodular parenchymal densities in the lungs in this patient with a complex history of waxing and waning pulmonary abnormalities , possibly explained by sarcoidosis .