Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable allowing for differences in technique . There is a vague rounded opacity projecting over the right lower lung , not clearly visualized on the recent prior study , although this may be due to differences in orientation of image acquisition . Peribronchial cuffing and interstitial thickening could be seen with mild vascular congestion or possibly other conditions such as airway inflammation or atypical infection . Regarding the focal right lower lung opacity , one concern is a possible mass . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Mild interstitial abnormality , new since the prior study . Correlation with clinical findings is suggested . The findings would be compatible with pulmonary vascular congestion . 2 . Focal right lower lung opacity , vague and possible new over the short interval , but somewhat rounded , suggesting infectious consolidation versus mass . Depending on clinical circumstances , if infection is suspected , then short - term follow - up radiographs , preferably with standard PA and lateral technique , if possible , are recommended , and otherwise short - term chest CT .