Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The hilar mediastinal contours are unremarkable . There is no overt pulmonary edema . The lung volumes are low , however there is an increase in opacity in the right infrahilar region . There is no pleural effusion , or pneumothorax .
    OUTPUT:
    
Increased opacity in the right infrahilar area could be from crowding secondary to low lung volumes , however an acute infectious process can not be excluded . A repeat frontal radiograph at full inspiration is recommended for further evaluation .