Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable frontal chest radiograph was obtained with the patient in the upright position . Cardiomediastinal silhouette is unchanged . Right PICC terminates at the level of the carina and is unchanged . Lungs are well expanded and clear with no focal consolidation , pleural effusions , or pneumothorax .
    OUTPUT:
    
No significant changes compared to the prior study .