Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal radiograph of the chest demonstrates left lower lobe atelectasis with associated volume loss , obscuring part of the left hemidiaphragm . Hazy opacifications are seen bilaterally along with prominence of the central pulmonary vasculature , suggesting some pulmonary vascular congestion . Allowing for AP projection , the heart is mildly enlarged . There is no pneumothorax or focal consolidation . A metallic opacity is seen projecting over the left lower hemithorax and may represent a bullet fragment .
    OUTPUT:
    
Mild cardiomegaly with pulmonary vascular congestion . No pneumothorax or focal pneumonia . Left lower lobe atelectasis .