{"id":81,"date":"2017-12-01T19:27:57","date_gmt":"2017-12-02T00:27:57","guid":{"rendered":"https:\/\/www.crpa-acrp-bulletin.ca\/?p=81"},"modified":"2020-02-18T20:50:45","modified_gmt":"2020-02-19T02:50:45","slug":"icrp-news-reflecting-icrps-past-looking-ahead-new-challenges","status":"publish","type":"post","link":"https:\/\/www.crpa-acrp-bulletin.ca\/fr\/2017\/12\/01\/icrp-news-reflecting-icrps-past-looking-ahead-new-challenges\/","title":{"rendered":"ICRP News: Reflecting on ICRP\u2019s past and looking ahead to new challenges"},"content":{"rendered":"
\n

R\u00e9sum\u00e9<\/h4>\n

La Commission internationale de protection radiologique (CIPR) fonctionne selon des mandats de quatre\u00a0ans; le mandat actuel a commenc\u00e9 le 1er<\/sup>\u00a0juillet\u00a02017. Le quatri\u00e8me\u00a0symposium international sur le syst\u00e8me de radioprotection se tiendra du 10 au 12 octobre 2017 \u00e0 Paris.<\/p>\n

La CIPR c\u00e9l\u00e9brera son 90e<\/sup>\u00a0anniversaire \u00e0 Stockholm, en Su\u00e8de, en octobre 2018, mais la commission principale de la CIPR viendra tout d\u2019abord \u00e0 Qu\u00e9bec pour prendre part au congr\u00e8s annuel 2018 de l\u2019ACRP.<\/p>\n

La CIPR a r\u00e9cemment fait para\u00eetre les publications\u00a0: Publication 134: Occupational Intakes of Radionuclides, Part 2, et Publication 135: Diagnostic Reference Levels in Medical Imaging. Des r\u00e9sum\u00e9s de ces deux publications sont inclus.<\/p>\n<\/div><\/div><\/div>\n

As one four-year term of the International Commission on Radiological Protection (ICRP) Main Commission and Committees came to an end (on June 30), and another began (on July 1), it was natural to look back at what has been achieved and ahead at what more needs to be done. This is even truer with ICRP\u2019s 90th anniversary looming on the horizon.<\/p>\n

Our official jubilee celebrations will take place in October 2018 in Stockholm, Sweden, where we were founded in 1928. I\u2019m very pleased to say that we will have a chance to celebrate unofficially here in Canada as well. The ICRP Main Commission will meet in Quebec just before the CRPA conference, April 30 to May 3, 2018, and many Main Commission members will stay to be part of CRPA\u2019s conference.<\/p>\n

The ICRP Main Commission has met in Canada only three times before\u2014twice in Ottawa, Ontario (in 1962 and 1972), and once in Whiteshell, Manitoba (in 1976). It is a particular pleasure for me to bring the Main Commission back to Canada next year. No doubt there will be a number of occasions to raise a glass in celebration when we all gather in Quebec.<\/p>\n

I suspect it\u2019s no coincidence that C.\u00a0Gordon Stewart, a member of the ICRP Main Commission from 1962 to 1977 and chair from 1969 to 1977, was a Canadian. There have been 11 ICRP chairs since 1928 (12 if you count Rolf Sievert twice; he served in 1928, and again from 1956 to 1962)\u2014four British, three Swedish, one French, one American, one Argentinian, and one Canadian. It is also no coincidence that of the nine scientific secretaries who served before me, the only Canadian, David Sowby, served from 1962 to 1985. Canada was clearly one of the leading nations in the radiation protection world in those decades.<\/p>\n

Turning your attention to more current events, we should have published two more issues of the Annals of the ICRP by the time you read this: Publication\u00a0134, Occupational Intakes of Radionuclides, Part\u00a02, and Publication\u00a0135, Diagnostic Reference Levels in Medical Imaging. Abstracts for both are below.<\/p>\n

Publication\u00a0134 has been eagerly awaited as the first set of internal dose coefficients based on the latest radionuclide emissions, radiation and tissue weighting factors, voxel phantoms, and biokinetic models. Occupational Intakes of Radionuclides, Part\u00a01 described the methodology, and Occupational Intakes of Radionuclides, Parts\u00a02 to 5 provide the numbers.<\/p>\n

Publication\u00a0135 provides important practical guidance on the setting and use of diagnostic reference levels, an important part of radiological protection that helps ensure high-quality clinical practice worldwide.<\/p>\n

You\u2019ve heard it before (I hope), but I can\u2019t end this piece without reminding you, yet again, that our 4th International Symposium on the System of Radiological Protection will be held in Paris, France, October 10 to 12, 2017, in conjunction with the 2nd European Radiological Protection Research Week. It is sure to be THE international Radiation Protection event of 2017. You can find more information at www.icrp-erpw2017.com<\/a>.<\/p>\n

ICRP Publication\u00a0134, Occupational Intakes of Radionuclides: Part\u00a02<\/em><\/h2>\n

The 2007 Recommendations of the International Commission on Radiological Protection (ICRP) introduced changes that affect the calculation of effective dose and implied a revision of the dose coefficients for internal exposure that were published in the Publication\u00a030 series and in Publication\u00a068. In addition, new data are available that support an update of the radionuclide-specific information given in Publication\u00a054 and Publication\u00a078 for the design of monitoring programs and retrospective assessment of occupational internal doses. Provision of new biokinetic models, dose coefficients, monitoring methods, and bioassay data were performed by Committee\u00a02, Task Group\u00a021 on internal dosimetry, and Task Group\u00a04 on dose calculations.<\/p>\n

A new series, the Occupational Intakes of Radionuclides (OIR) series, will replace the Publication\u00a030 series and Publications\u00a054, 68, and 78. Part\u00a01 of the OIR series has been issued as Publication\u00a0130, Occupational Intakes of Radionuclides: Part\u00a01, which describes the assessment of internal occupational exposure to radionuclides, biokinetic and dosimetric models, methods of individual and workplace monitoring, and general aspects of retrospective dose assessment.<\/p>\n

Subsequent publications in the OIR series (Parts 2\u20135) will provide data on individual elements and their radioisotopes, including<\/p>\n

    \n
  • information on chemical forms encountered in the workplace;<\/li>\n
  • a list of principal radioisotopes, their physical half-lives, and their decay modes;<\/li>\n
  • the parameter values of the reference biokinetic model; and<\/li>\n
  • data on monitoring techniques for the radioisotopes encountered most commonly in workplaces.<\/li>\n<\/ul>\n

    Reviews of data on inhalation, ingestion, and systemic biokinetics are also provided for most of the elements.<\/p>\n

    Dosimetric data provided in the printed publications of the OIR series include tables of committed effective dose per intake (Sv per Bq intake) for inhalation and ingestion, tables of committed effective dose per content (Sv per Bq measurement) for inhalation, and graphs of retention and excretion data per Bq intake for inhalation. These data are provided for all absorption types and for the most common isotope(s) of each element.<\/p>\n

    The electronic annex that accompanies the OIR series contains a comprehensive set of committed effective and equivalent dose coefficients, committed effective dose per content functions, and reference bioassay functions. Data are provided for inhalation, ingestion, and direct input to blood. The present publication provides the above data for the following elements: hydrogen (H), carbon (C), phosphorus (P), sulphur (S), calcium (Ca), iron (Fe), cobalt (Co), zinc (Zn), strontium (Sr), yttrium (Y), zirconium (Zr), niobium (Nb), molybdenum (Mo), and technetium (Tc).<\/p>\n

    ICRP Publication\u00a0135, Diagnostic Reference Levels in Medical Imaging<\/em><\/h2>\n

    The International Commission on Radiological Protection (ICRP) first introduced the term diagnostic reference level (DRL) in Publication\u00a073. The concept was subsequently developed further and practical guidance was provided in 2001.<\/p>\n

    DRLs have been proven to be an effective tool that helps optimize protection of patients from medical exposure during diagnostic and interventional procedures. However, with time it has become evident that additional advice is needed. Some of the issues include<\/p>\n

      \n
    • definitions of the terms used in previous guidance,<\/li>\n
    • determination of the values for DRLs,<\/li>\n
    • appropriate interval for re-evaluating and updating these values,<\/li>\n
    • appropriate use of DRLs in clinical practice,<\/li>\n
    • methods for practical application of this tool, and<\/li>\n
    • application of the DRL concept to newer imaging technologies.<\/li>\n<\/ul>\n

      \"\"<\/p>\n

      Publication 135 is intended as a source of additional information and guidance on these issues, including the clarification of some terminology. In addition, the report recommends quantities for use as DRLs for various imaging modalities and provides information on use of DRLs for interventional procedures and in pediatric imaging. It suggests modifications in the conduct of DRL surveys that take advantage of automated reporting of radiation dose-related quantities and points out the importance of including information on DRLs in training programs for health care workers.<\/p>\n

      The target audience for this report includes national, regional, and local authorities; professional societies; and staff at facilities where ionizing radiation is used for medical purposes. A full set\u00a0of the Commission\u2019s recommendations is provided.<\/p>\n

      \n

      \"\"Chris Clement<\/h2>\n

      Chris Clement, a certified health physicist, has worked in radiation safety since the 1980s, first on environmental restoration projects, then with the Canadian Nuclear Safety Commission (CNSC), where he was the director of radiation protection when he left in 2008. He is currently the scientific secretary of the International Commission on Radiological Protection (ICRP).<\/p>\n

      Chris Clement, sp\u00e9cialiste de radiophysique m\u00e9dicale sanitaire agr\u00e9\u00e9, travaille en radioprotection depuis les ann\u00e9es 1980, d\u2019abord dans des projets de restauration environnementale, puis avec la Commission canadienne de s\u00fbret\u00e9 nucl\u00e9aire, o\u00f9 il portait le chapeau de directeur de la radioprotection \u00e0 son d\u00e9part en 2008. Aujourd\u2019hui, il occupe le poste de secr\u00e9taire scientifique de la Commission internationale de protection radiologique (CIPR).<\/p>\n<\/div><\/div><\/div>

      <\/div>\n","protected":false},"excerpt":{"rendered":"

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