Since 1 February 2019, the SAW IDENT-based system for patient protection in radiotherapy at the Dresden Municipal Hospital has been in operation. The project for the development of this solution was supported by the economic development of the city of Dresden. On February 7, 2019, the new system was presented to the public.
Methods of radiotherapy are widely used in medicine. The Municipal Hospital Dresden operates in this field, i.e. an X-ray therapy facility. With this, approximately 1400 patients are treated each year, primarily in degenerative joint diseases, but also with near-surface tumors. To generate the radiation, an X-ray tube is used in such a system. With the help of tubes of different sizes, the size of the radiation field is subsequently adapted to that of the clinical findings. A disadvantage of the system is that it does not recognize which tube is inserted. So far, the control of the correct choice of the tube to be inserted only by the employees, which carries despite careful work the risk of error. This means there is a risk of incorrect irradiation if the tube is selected incorrectly.
The system consists of SAW IDENT transponders on the tube of an irradiation device. The transponders are read via a reading antenna on the irradiation head and the ID is evaluated by a SAW ECO + reader and transmitted to the on-site safety system in practice. There, the recognized ID is compared with the required transponder and the radiation is released only when the tube is correct.
A major advantage of this task is that SAW IDENT transponders, in contrast to semiconductor-based RFID transponders, are immune to ionizing radiation and can thus be used permanently in the irradiation area.