Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes . Mild interstitial pulmonary abnormality persists . No pleural effusion . No focal consolidation . Mild to moderate cardiomegaly is stable . Thoracic aorta is tortuous . Bones are demineralized . Remote left rib fracture is noted . Sternotomy wires are intact . Surgical clips project over cardiac silhouette . Tracheostomy tube appears appropriately positioned .
    OUTPUT:
    
Persistent mild interstitial abnormality and mild cardiomegaly are chronic .