Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Accessed Port - A - Cath projecting over the left chest terminates in the lower SVC , unchanged . Heart is normal size and cardiomediastinal contour is stable . Lungs are clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No substantial change compared to the prior study and no evidence of pneumonia .