Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . The patient 's chin obscures evaluation of the lung apices . There is evidence of volume loss in the right lung with elevation and tenting of the right hemidiaphragm . Postsurgical changes from prior right upper lobectomy are again noted . There is crowding of the bronchovascular structures , and fluffy opacification about the perihilar regions , more so on the right , may suggest mild pulmonary vascular engorgement or an infectious process . Previously noted diffuse hazy opacification in the right lung has improved . There is continued mild cardiomegaly . The mediastinal contours are unchanged . There is no large pleural effusion or pneumothorax . Partially imaged is a right humeral head prosthesis .
    OUTPUT:
    
Limited study . Postsurgical changes in the right lung following right upper lobectomy . Perihilar fluffy opacities , right greater than left , may reflect mild pulmonary vascular engorgement but an infectious process or aspiration can not be excluded . Consider repeat PA and lateral chest radiographs when the patient can take a deeper inspiration .