In 1997 the TOSS company developed and
produced the socalled self-sufficient safety facility (ASE) for the eye
tumor therapy team (ATT) at the HMI.
Till now, the heavy ion accelerator for
the irradiation therapy in humans has been exclusively used for the eye
tumor therapy with highly energetic protons. In the medical irradiation
therapy, there are strong safety standards defined within the norms for
medical electron accelerators (DIN 6847). In the scope of the therapy
project at the HMI, it was, therefore, necessary to guarantee the
appropriate safety standards. With the ASE, an interlock system was
developed to ensure the safety of the patients during the irradiations.
The ASE monitors important parameters of the therapy via analogous and
digital input channels, as well as input counters and carries out the turn
off of the proton beam in the case of registered differences from given
safety conditions. In addition, extensive internal function tests and
protocol functions were realized. As a redundantly produced autonomous
process monitoring and control unit, the ASE is the central security
element of the therapy process.
The ASE and its documentation were part
of an administrative expert examination for the permission of the therapy
process, because an irradiation therapy with highly energetic protons was
not yet existing in Germany. Both of it were accepted without objection.
With that and the high quality of the work, the TOSS company considerably
contributed to the successful start of the proton therapy in Germany.
Moreover, assessing the work, there are to pronounce
the very good observance of dates and the permanent availability, which,
in particular, were very important in preparing the expert examinations.
We, therefore, can recommend the
TOSS company for the carrying out of jobs with highly safety-relevant
standard in the way mentioned without reservation.