Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright portable radiograph of the chest demonstrates clear lungs and normal hilar and cardiomediastinal contours . The increased apparent opacity in the right lower lung is due to a combination of minimal atelectasis , pulmonary vasculature , and prominent costochondral calcifications . There is no pneumothorax or pleural effusion . There are dense atherosclerotic calcifications in the aortic arch . Pulmonary vascularity is normal .
    OUTPUT:
    
No acute cardiopulmonary process .