Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Moderate cardiomegaly is stable . Pulmonary arteries are chronically enlarged but peripheral pulmonary vessels are not engorged and there is no edema or pleural effusion . Homogeneous area of opacification on the lateral view could represent left upper lobe or lingular atelectasis . Tracheostomy tube noted .
    OUTPUT:
    
Stable moderate cardiomegaly . Chronically enlarged pulmonary arteries without pulmonary edema or pleural effusion . Questionable left upper lobe or lingular atelectasis .