Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal chest radiograph demonstrates unremarkable cardiomediastinal contours . There is a prominence of the bilateral pulmonary arteries suggesting underlying pulmonary arterial hypertension . No focal opacification concerning for pneumonia identified . No pulmonary edema present . No pleural effusions noted . No osseous abnormality present . Aortic balloon pump terminates in the aorta .
    OUTPUT:
    
Possible pulmonary arterial hypertension . No pulmonary edema .