trs 457, dosimetry in diagnostic radiology: an international code … · sÄteilyturvakeskus •...

SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALENRADIATION AND NUCLEAR SAFETY AUTHORITY

TRS 457, Dosimetry in Diagnostic Radiology: An International Code of Practice

Antti KosunenRadiation Metrology Laboratory-STUK

NCRRP and STUK Workshop on dosimetry in radiotherapy and in diagnostic radiology

6th and 7th of November, 2008Sofia, Bulgaria

SÄTEILYTURVAKESKUS • STRÅLSÄKERHETSCENTRALENRADIATION AND NUCLEAR SAFETY AUTHORITY 23.11.2008 / AK-STUK


IAEA TRS 457, Scope and Objective


IAEA TRS 457, Work


Implementation of the International Code of Practice on Dosimetry in Diagnostic Radiology (TRS 457):

Review of testing resultsCoordinated Research Project on Implementation of the International Code of Practice

on Dosimetry in Diagnostic Radiology TRS 457 at Secondary Standard DosimetryLaboratories and HospitalsDRAFT OF June 2008

IAEA TRS 457, Work


IAEA TRS 457, Chapter 1: Introduction


IAEA TRS 457, Chapter 2: Framework


( 2sd )

7 %• Relative risk• Interventional procedures • Quality assurance

measurements• Paediatric procedures

20 %• Risk assessment : Absolute risk • Dose surveys

IAEA TRS 457, Chapter 2: Framework


IAEA TRS 457, Chapter 3: Quantities and units



New ICRP in 2007


• NK based formalism

• Beam quality correction factor

IAEA TRS 457, Chapter 4: Dosimetry formalism

Cross calibrations

• Especially with KAP meters


IAEA TRS 457, Chapter 5: Selection of instruments


IAEA TRS 457, Chapter 6: Establisment of SSDLs


IAEA TRS 457, Chapter 7: CoP for calibrations at SSDLs


...continues


IAEA TRS 457, Chapter 8: CoP for clinical measurements


8.1 Introduction

• Worksheets• Dosimeters should be calibrated at the laboratory• Calibration interval:

• Based on national requirements,• Usually should not exceed two years



8.2 Patient selection

• Limitations of phantom measurements• Patients for reference dose levels



IAEA TRS 457, Coordinated Research Project for Testing of the CoP

Implementation of the International Code of Practice on Dosimetry in Diagnostic Radiology

(TRS 457):Review of testing results

Coordinated Research Project on Implementation of the International Code of Practice on Dosimetry in Diagnostic

Radiology TRS 457 at Secondary Standard DosimetryLaboratories and HospitalsDRAFT OF June 2008


1. Radiation and Nuclear Safety Authority (STUK), Finland2. Greek Atomic Energy Commission (GAEC), Greece3. Institut für Biomedizinische Technik und Physik, Austria4. National Institute for Radiological Protection, China 5. National Radiation Protection Institute, Czech Republic6. Frederic Joliot-Curie National Research Institute for Radiobiology, Hungary7. Instituto de Radioprotecao e Dosimetria, Brazil 8. Dept. of Medical Sciences, Div. of Radiation and Medical Devices, Thailand9. Institute of Nuclear Sciences and Technology, Vietnam 10. Centro de Proteccion e Higiene de las Radiaciones (CPHR), Cuba 11. Regional Medical Physics Department, Newcastle General Hospital, UK........



Activity 7 Practical peak voltage

Activity 6 TLD dosimetry audit for diagnostic measurements

- at hospitals

- at SSDLs

Activity 5 Calibration of KAP meters

4b TLD measurement of GR phantom

- report measurements in hospitals

(a - ii) implementation of measurement procedures in hospital incl. measurements with patients

(a - i) report on phantoms and dosimeters available and capabilities to manufacture phantoms.

Activity 4 Evaluation of measurement procedures in hospitals

Activity 3 Comparison of calibrations

Activity 2 Development of calibration procedures including the uncertainty budget

Activity 1 Setting-up of calibration beam qualities at SSDLs

Activity


trs 457, dosimetry in diagnostic radiology: an international code … · sÄteilyturvakeskus •...

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