Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiographs demonstrate a right chest porta catheter , it s tip which projects in the mid to the low superior vena cava unchanged since prior study . Heart size is upper limits of normal . There is widening of the vascular pedicle with prominent central vasculature . There is no overt pulmonary edema . There is no pleural effusion or pneumothorax . Lung volumes are low . No opacity worrisome for an infectious process is present . There is no air under the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic abnormality . No opacity convincing for pneumonia .