Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size appears top normal . Rightward shift of mediastinal structures is noted as result of volume loss in the right lower lobe . Right lower lobe central mass resulting in a right lower lobe patchy opacity , likely postobstructive atelectasis , is noted , but better visualized on the previous CT . Remainder of the lungs are clear without new focal consolidation . No pneumothorax or pleural effusion is identified . The pulmonary vasculature is not engorged . Soft tissue calcifications are seen within the left chest wall . Degenerative changes with anterior osteophyte formation is noted in the thoracic spine . No acute fractures are clearly seen .
    OUTPUT:
    
Central right lower lobe mass resulting in postobstructive atelectasis in the right lower lobe again visualized , but better seen on the previous chest CT . No new focal consolidation . No displaced fractures .