Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are mildly hyperinflated , unchanged since ___ . Persistent mild cardiomegaly . Normal hilar and mediastinal structures . No pneumonia , no pulmonary edema . No pleural effusions . No suspicious bony lesions in the thorax .
    OUTPUT:
    
Mildly hyperinflated lungs and mild cardiomegaly , unchanged since ___ .