Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semiupright position . Analysis is performed in direct comparison with the next preceding chest examination which was dated ___ . The indication for the almost ___-year - old preceding examination was similar in as much the patient had experienced a fall and acute injuries were questioned at the emergency room examination . The present portable chest examination shows similar findings in as much as the heart size is borderline and the thoracic aorta is moderately elongated and widened with calcium deposits in the wall . There is , however , no suspicious local contour abnormality . The pulmonary vasculature is not congested . In comparison with the next previous examination , however , the left base is somewhat poorly ventilated with crowded vasculature and mildly elevated left - sided diaphragm . The left lateral pleural sinus ; however , is free and thus there is no evidence of pleural effusion . No pneumothorax is seen . The general appearance of some irregular vascular peripheral distribution is suggestive of COPD . No pneumothorax in the apical area . Unchanged appearance of a left - sided shoulder arthrodesis with metallic humeral head prosthesis .
    OUTPUT:
    
Possibly beginning infiltrate on the left lung base . Otherwise , no acute infiltrates or marked CHF on this portable chest examination . Followup study is recommended . Page to Dr . ___ was placed at 3 :40 p .m .