Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided pacemaker device is noted with leads terminating in the right atrium and right ventricle . Heart size is mildly enlarged . The aorta is tortuous and diffusely calcified . Mediastinal and hilar contours are unremarkable . Crowding of bronchovascular structures is present without overt pulmonary edema . Minimal blunting of the left costophrenic angle could suggests a trace left pleural effusion . Atelectasis is seen in the lung bases without focal consolidation . No large pneumothorax is identified . Moderate degenerative changes are seen within the thoracic spine . Multiple ovoid and rounded ossific densities within the right shoulder likely reflect loose bodies .
    OUTPUT:
    
Possible trace left pleural effusion . Otherwise , no acute cardiopulmonary abnormality .