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Forschungsstelle
METAS
Projektnummer
F-5155.30157
Projekttitel
Construction du laboratoire de rayons X QB35

Texte zu diesem Projekt

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Schlüsselwörter
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Kurzbeschreibung
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Projektziele
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Umsetzung und Anwendungen
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Erfasste Texte


KategorieText
Schlüsselwörter
(Englisch)
X-rays, OIMRI, dosimetry, ionizing radiation, air kerma, absorbed dose, calibration, checks, beam
Kurzbeschreibung
(Englisch)

Since the OIMR ordinance came into force in 2013, its implementation has often come up against interpretations and ways of doing things by verification laboratories that diverge quite a bit from the basic idea of measuring instrument regulation. Examples include unilateral decisions to put instruments into service without approval, on the grounds that the ordinance was not applicable, or non-harmonized verification methods introduced without consultation. Over the past few years, it has become clear that the best way to implement OIMRI, and to understand the difficulties associated with it, is to acquire the necessary skills in most of the fields covered by the ordinance.
With a complete overhaul of the ordinance, the development of the theoretical and technical skills needed to implement it are the basic pillars of the strategy followed by the laboratory. It is with this vision that the laboratory has made a considerable effort to stabilize the M22 accelerator, developed a new radon measurement facility and set up a collaboration with the Mühleberg power plant for the operation of a Cs measurement facility. 
As the measures mentioned above have clearly borne fruit, the development of an X-ray measurement facility is a strategic step that seems necessary to consistently implement the revision of the OIMRI.

Projektziele
(Englisch)

The aim of this project is to set up an X-ray facility to implement the OIMRI ordinance through a high-quality verification service for X-ray measuring equipment. The result of this project will be an X-ray measurement facility, equipped to produce a wide range of beam qualities, enabling the following services to be carried out, in line with OMRI requirements:

a) Approval and verification of dosimeters for superficial radiotherapy with X-rays from 10 to 100 kV (currently at PTB) and deep radiotherapy with X-rays from 100 to 300 kV (currently at IRA, shutdown planned) according to DIN 6809-4.
b) Approval and verification of radiation protection dosimeters with an X-ray beam (currently with a Caesium 137 source) in accordance with ISO 4037-1,2,3,4.
c) Approval and verification of radiodiagnostic dosimeters with 50 to 150 kV X-rays to DIN 6809-3 and IEC 61267 beam qualities (currently at IRA), as well as devices measuring dose-length and dose-surface products to IEC 60580.

Umsetzung und Anwendungen
(Englisch)

The ionizing radiation laboratory will offer approvals, calibrations and verifications from a single center. It will use this new measurement facility to contribute to the safety of patients and medical staff, and to strengthen Switzerland as a location for business and research.

Publikationen / Ergebnisse
(Englisch)

The system will have to be fine-tuned and characterized in accordance with current standards (beam alignment, beam profile, beam qualities, etc.). Metrological connections for beam qualities standard in radiotherapy will be made using dosimeters connected to the PTB (secondary standards).
Laboratory documentation will have to be drawn up, describing both the technical installation and the quality assurance of the measurement places using it. The documentation of the old installation has been studied, and certain elements may be reused.