Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views have been obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . The heart size is unchanged and remains within normal limits . The thoracic aorta and mediastinal structures are unremarkable . The pulmonary vasculature is not congested . On previous examinations identified multifocal parenchymal infiltrates have further undergone marked regression . There remain , however , some mostly linear densities in the areas of the previous infiltrates in the right middle lobe and left lingular area . No new acute abnormalities are seen , no pleural effusion is identified nor is there any pneumothorax in the apical area .
    OUTPUT:
    
Further improvement of previously identified multifocal pneumonic infiltrates . As there persist a few remnants further followup is recommended to ascertain stability .