INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTIONICRP ref: 4840-5603-9455

ICRP Committee 3 Meeting
September 1 - 3, 2014 – Paris, France
Participants:
VANO Eliseo (Spain) Chair
MILLER Donald (USA) Vice-Chair
REHANI Madan (Austria/USA) SecretaryÅHLSTRÖM RIKLUND Katrine (Sweden)
APPLEGATE Kimberly (USA)BOURGUIGNON Michel (France)
DAUER Lawrence (USA)DEMETER Sandor (Canada)
KHONG PekLan (Hong Kong, China)
LOOSE Reinhard (Germany)
MARTIN Colin (UK)
ORTIZ LOPEZ Pedro (Spain)
SCALLIET Pierre (Belgium)
YONEKURA Yoshiharu (Japan)
YUE Baorong (China)
Apologies:
KANG Keon (South Korea)
Representatives of International Organizations
HOLMBERG Ola (IAEA)
PEREZ Maria Del Rosario (WHO)Follow-up of points raised during the last ICRP Symposium in Abu Dhabi.
Several international organizations in particular IAEA and WHO are alreadyengaged in some of these points, e.g. justification; unified referral criteria andsupport for adaptation of these at regional level, application of referral criteria;
protection of the patient in the future (as earlier highlighted in Bonn); justification andoptimization as part of the quality in medicine; the Bonn call-for-action andcooperation with other organizations and education and training of physicians, andapproaches and policies in relation to the increased use of CT examinations and theassociated doses. Further, guidance on radiological protection in emergency
medicine (NCRP); dosimetry and protection in CT (already ICRP has Publications 87and 102, and one on CBCT is almost complete); review definition of controlled area,
occupational and patient protection in medicine; presentation of the results fromepidemiological studies in CT; tracking of patient exposure and doses; cumulative
patient doses (primarily IAEA, but ICRP is considering the topic of optimization forindividuals and may cover some aspects here in addition to other strategies),
uncertainties in the estimation of effective doses and organ doses (the TG on
effective dose of ICRP will cover this).Standardization of patient dosimetry anddosimetric parameters from medical devices is being undertaken by AAPM and thisis supposed to be an action by ICRU.
Chair’s report and discussion.
A summary of the Main Commission meetings was presented. The role of C3
in the external relations of ICRP was summarized including details from IAEA, WHO,NCRP and the Working Party on Medical Exposures (Euratom). Observations about
future actions and topics of interest (including suggestions for research) were
presented, and the need for these to be updated during the Committee 3 annual
meeting in Paris stated.

www.icrp.org

INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION
Progress in the TGs & WPs.
・	 TG 87: Radiological protection in Ion Beam therapy: Yoshiharu Yonekura
informed C3 about the comments received through public consultation. There aremore than 50 comments from 6 organizations or individuals. The document wasfavourably received. The TG will attend to these comments and will provide a
finalized copy to C3 together with responses to the comments made.
・	 TG 88: Radiological Protection in Cone Beam CT: Madan Rehani informed
C3ofthe progress following the Abu Dhabi meeting. The updated version wasposted on the ICRP website on 17 June with a deadline for final comments of 19
Sept 2014. After the deadline, comments will be addressed by the TG and therevised document will be provided to C3 for information and sent to the Main
Commission (MC) for further action.
・	 TG 89: Occupational Radiological Protection in Brachytherapy: Lawrence
Dauer informed C3that an initial full draft for discussion by TG-89 members will
be completed by the reconstituted TG-89 membership in the next 3-6 months (byMarch 2015). A finalized draft will be produced by June 2015for review/comment.
The aim is to incorporate necessary revisions before the next annual meeting ofCommittee 3 in 2015 (October).
・	 WP: Justification: Framework for Justification in Medical Uses of Ionizing
Radiation: Katrine Åhlström Riklund presented the document. It is apparent thatseveral organizations have produced documents or are preparing ones in thesame field. The conclusion is that the ICRP justification document should take
into account the material already published on issues regarding justification. A
revised draft will be prepared (Sep-Oct 2014) and feedback obtained by Feb
2015. After the ECR 2015, the chair will circulate a second revision to TG
members. A final revision will be carried out by the chair before passing ont hedocument to C3 (Jul-Aug 2015).
・	 TG36: Dose to patients from radiopharmaceuticals: Katrine Åhlström Riklund
presented the progress. A final version has been submitted to the Scientific
Secretariat of ICRP. The work with dosimetric models for F18-Flutemetamol,
F18-Florbetapir will be initiated during the next year. C3 is appreciative of thework done by the Emeritus member and honorary co-chair Soren Mattsson.
・	 WP: Radiological Protection in Therapy with Radiopharmaceuticals:
Yoshiharu Yonekura presented the progress. In addition to the topics discussed
previously, new aspects, including the assessment of individual dosimetry andradiobiology of alpha emitters were considered. Co-chairs (Yoshiharu Yonekura
and Soren Mattsson) will assign each chapter to contributors based on theexpertise of members and corresponding members. It is expected that the firstdraft will be produced before the next C3 meeting in October 2015.
・	 WP: Occupational protection issues in interventional procedures(fluoroscopy guided): Pedro Ortiz Lopez stated that a draft will be completed byApril 2015 and submitted to Committee 3 for discussion at the 2015 meeting.
・	 WP: Diagnostic reference levels for diagnostic and interventional imaging:
EliseoVano presented the status of the draft. A new version will be available byDecember 2014 and a final draft will be produced and sent to all the C3 members
by February 2015. It is expected to have a final draft to be submitted to the MCfor potential approval (and start the public consultation) during 2015.
・	 TG: Effective dose: Pedro Ortiz and Colin Martin presented the progress made.
This is a TG chaired by J. Harrison (C2) with members of several ICRP
Committees. Effective dose will be explained as a dose quantity linked to risk, butintended for the control of exposures for protection purposes and not risk
assessment. It should be noted, though, that while radiation doses can bemeasured and effective doses calculated down to low doses, the associated risk
is uncertain and inferred on the basis of assumptions regarding risk projection
across populations and dose-response relationships. The plan is to prepare an
initial report to be circulated for comment during spring / early summer 2015 andhave a revised version ready for the October meeting of ICRP.

-2-INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION
・	 WP: Individual human sensitivity to ionizing radiations: Michel Bourguignon
presented the progress of the WP. The title of the WP has been changed from
“Individual human sensitivity to ionizing radiation” to “Radiation protection in
medicine related to individual radiosusceptibility” to limit the scope of the project
to medical exposures and to clarify the issues (the word “radiosensitivity” hasbeen replaced by the word “radiosusceptibility” because radiosensitivity has alimited and precise meaning). The first draft is expected at the end of Sept 2014.
There will be a prevision of a draft document to be discussed during the annualmeeting of C3 (Oct 2015).
・	 Radiation and your patient- a guide for medical practitioner: Sandor Demeter
presented the current draft of the educational document entitled "Radiation And
Patient Protection: A Guide For Health Care Practitioners". It was generally
supported that the document be targeted to primary care health care providers
and be written in a lay medical language while keeping definitions as per theICRP glossary.
Educational Slides.
The draft slides provided for P 113, 117, 120 and 121 shall .be reviewed by atleast one critical reviewer of C3.
Future Topics
It was decided to keep these topics under review
a. Framework for optimization in medical imaging in particular forindividual patients.
b. Proposal for standardization of dose metric (quantities and units) for
medical imaging equipment, displays and radiation dose analysis
software.
c. Protection of eye lens, cardiovascular and brain: Implications for
medicine of the ICRP Publication 118.
The next meeting of the Committee will take place in Seoul, Korea, in October 2015,
in conjunction with the third ICRP International Symposium on the System ofRadiological Protection.

-3-