Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates a right - sided central venous catheter that terminates in the mid SVC . The cardiac silhouette is mildly enlarged , and is likely exaggerated due to supine technique . There is bibasilar atelectasis . No definite , large pleural effusion or pneumothorax is identified . There is no definite focal consolidation .
    OUTPUT:
    
No definite evidence of pneumonia .