Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An AP single view of the chest has been obtained with patient in semi-upright position . High positioned diaphragms indicate poor inspirational effort and obscure cardiac borders in part . Significant cardiac enlargement , however , is unlikely . Unremarkable appearance of mediastinal structures including contours of thoracic aorta . Pulmonary vasculature is not congested . No signs of acute or chronic parenchymal infiltrates are present , and the lateral pleural sinuses are free . No pneumothorax in the apical area . Our records do not include a previous chest examination available for comparison .
    OUTPUT:
    
No evidence of cardiovascular or pulmonary abnormalities on single view AP chest examination .