Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient 's condition required examination in sitting semi-upright position using AP frontal and left lateral views . On the frontal view , the heart appears to be borderline in size without typical configurational abnormality . Unremarkable appearance of thoracic aorta with some calcium deposits in the wall at the level of the arch . The pulmonary vasculature is not congested . No signs of acute or chronic parenchymal infiltrates are present and the lateral and posterior pleural sinuses are free . No pneumothorax is identified in apical area . In the right shoulder area , exists evidence of previous surgical intervention with several metallic plugs . No other gross skeletal abnormalities within the thoracic area . Our records do not include a previous chest examination available for comparison .
    OUTPUT:
    
No evidence of acute pneumonia .