Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , exaggerating the cardiomediastinal structures ; however , there is mild cardiomegaly , overall unchanged compared to the prior exam . The aorta is tortuous . Otherwise , the hilar and mediastinal contours are normal . No focal consolidations concerning for pneumonia are identified . There is no pleural effusion or pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
No focal consolidations concerning for pneumonia identified .