According to the usage specification of medical devices, physiological saline is a common medical product, which is usually used in intravenous infusion and other treatment processes. Normal saline is stored at the edge of CT room, which is convenient for medical staff to get it quickly when needed. Normal saline itself will not have any negative impact on ct equipment, nor will it interfere with the accuracy of CT scanning. Therefore, it is no problem to store normal saline at the edge of CT room.