Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable frontal chest radiograph demonstrates severe background emphysematous changes with relative lucency of the lungs and increased reticular nodular opacifications in the lung bases , left greater than right , the latter possibly representing developing infectious process or simply atelectasis . Focal nodular opacification projecting over the right lower lung . Unclear if this is within the lung parenchyma or external to patient . Not present on prior chest CTs ; recommend reevaluation with oblique radiographs or non-emergent chest CT . Cardiomediastinal and hilar contours are unremarkable . No pleural effusion or pneumothorax is evident .
    OUTPUT:
    
1 . Stable severe background emphysematous changes with minimally increased opacification in the left lung base may reflect developing infectious process or relate to chronic background scarring . 2 . 1 - cm nodule projecting over right lower lung . Recommend reevaluation with oblique radiographs or non-emergent dedicated chest CT .