Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is mildly enlarged . Aorta is slightly tortuous . There is crowding of the bronchovascular structures without overt pulmonary edema . A patchy opacity is noted within the left lower lobe concerning for pneumonia . No pleural effusion or pneumothorax is present . No acute osseous abnormalities detected .
    OUTPUT:
    
Patchy opacity in the left lower lobe concerning for pneumonia in the correct clinical setting .