How to prevent X-ray from hurting normal cells

             In modern medical field, all kinds of x ray equipments have been widely used
in hospitals, health centers, clinical centers and so on.There are mobile x ray
machine, stationary x ray machine, c arm machine ect. The x ray technology brings much
convenience to medical field, but as every one knows, overmuch x ray can do a lot of
harm to human body.
                 According to British engineer's website reported recently, UK Bristol
university and university of swan lake is researching a X-ray sensor which can prevent
doctors from incorrect treatment to cancer radiotherapy patient. The sensor can produce
alarm to remind doctors to stop light when X-ray illuminates in normal patients.
              The sensor’s research is based on physics study used to detect charged
particles sensor, according to design requirements, the sensor placed between patients
and medical x-ray machine must be designed very shin, so it will not affect the normal
illuminates by medical x-ray. The sensor can not only detect 0.0001% intensity of ray
radiation but also is very convenient for doctor to adjust x-ray’s shape and strength
by sensor’s collimator, which make x-ray hitting tumor location much more accurately.
                  Besides, the research team is still developing related software which can
predict the sensor’s possible problems in using process and compare to normal
situation, so operators can find problems and can prevent incorrect treatment. It is
expected that the sensor in the final product will be put into use in the hospitals
within three years.