Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . Patient is status post right upper lobectomy , however , since recent exam there has been interval volume loss in the right hemithorax as well as increased right perihilar opacity . The left lung is grossly clear . The cardiomediastinal silhouette is shifted to the right but otherwise unchanged . No acute osseous abnormalities detected .
    OUTPUT:
    
Interval volume loss in the right hemithorax with increased perihilar opacity . Underlying mass is better characterized on prior with superimposed development of atelectasis or potentially infection .