Leaks do happen, more than that has to be rectified and serious fines are imposed. Also a lot of new machines are now with new algorithms for low dose scanning. This is why all the radiology staff don't like patients and their families in the work area. Patients and their families in the waiting area will not have radiation leakage, more leakage is in the area where our staff operates, because there are a lot of wires, control the computer, control the bulb tube, transmission of images, are a finger-thick wires, they can not be completely buried in the ground, then inevitably have to be punched holes in the wall, and holes in the wall will not be completely adapted to the caliber of the wires, then there will be gaps, there will be part of the radiation leakage, there will be part of the radiation leakage, there will be part of the radiation leakage. There must be some radiation leakage. Then why staff can still feel comfortable sitting in the operating room it, because we have repeated measurements of the dimensions of each machine room to ensure that the ray from the bulb to the leakage of the place has been attenuated to the point of basically no effect on people, the dose is probably not much different from the radiation suffered by watching TV, but it does exist. There is also the door, we all know that the light can not be bent, but can be refracted and reflected, x-ray is the same, x-ray due to the energy to cross the large penetrating so the refractive index is very low, but the reflection, especially diffuse reflection is relatively high. The hospital's lead door can indeed block the radiation leakage, but who can not find no door, if there is no door that is the wall (laughs), this time the diffuse reflection may be drilled out of the door, so the majority of patients and their families to wait in the waiting area waiting for film, do not pile up in the doorway of the machine room, a responsible for their own health, and secondly, is to alleviate the burden of the staff to call the patient is really tired of the doorway! Piling up so many people, who called who can not hear, a long time to think that did not call to come over again to quarrel, everyone is trouble. There is also a point I would like to say is that, please be sure to wait quietly and orderly, so many patients, the doctor did not have the heart to give who went to insert a queue.