Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low , with mild bibasal atelectasis . Triangular / linear opacity in the right lung zone . The lungs are otherwise clear . Mild cardiomegaly . Multiple healing left rib fractures . No significant effusions . No pneumothorax .
    OUTPUT:
    
Irregular opacity in the right mid lung is nonspecific and in the absence of prior could represent site of infection , atelectasis or malignancy in this patient with prior adenocarcinoma .