Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable single frontal chest radiograph was obtained . Lung volumes remain low with crowding of bronchovascular structures . An area of increased opacity is present in the right middle lobe with obscuration of the right heart border . There is a small right pleural effusion . The left lung is clear . The cardiac silhouette is unchanged .
    OUTPUT:
    
1 . Increased right middle lobe opacity likely secondary to low lung volumes and non-cardiogenic edema , but may reflect a developing consolidation . This area will need attention on follow - up radiographs . 2 . Small right pleural effusion .