Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided AICD device is noted with single lead terminating in the region of the right ventricle , though not completely imaged on this study . Heart size is normal . Mediastinal contour is unchanged . The right PICC has been removed . Pulmonary vasculature is not engorged . New ill - defined opacity is seen within the right lung base . Retrocardiac opacity is also noted , as seen previously . No large pleural effusion is demonstrated though the costophrenic angles are not completely included in the field of view . There is no pneumothorax . No acute osseous abnormalities demonstrated .
    OUTPUT:
    
New focal opacity within the right lung base concerning for an area of pneumonia . Retrocardiac opacity could reflect atelectasis though additional site of infection is not excluded . No large pleural effusion is demonstrated although the costophrenic angles are not completely included in the field of view .