Vol. 6, 2021
Microwave, Laser, RF and UV radiations
Patient and personnel health and safety in Magnetic Resonance Imaging Facility
M. Israel, M. Ivanova, P. Ivanova, Ts. Shalamanova, H. Petkova
Pages: 109–114
DOI: 10.37392/RapProc.2021.23
Abstract | References | Full Text (PDF)
There are two aspects to be considered when using magnetic resonance imaging (MRI) equipment for diagnosis: patient and personnel protection. In regard to patient protection, the following main issues should be treated: individual characteristics, risk / benefit ratio; exposure time and exposure pattern, etc. The medical personnel protection is regulated by Directive 2013/35/EU and represents a major challenge in the EMF protection in the working environment. The Directive recognizes that for some activities/circumstances related to the installation, testing, use, development, maintenance and research related to magnetic resonance imaging (MRI) equipment may not comply with the exposure limit values. In these cases, the regulatory document introduces derogations that provide for risk management approaches for that specific source. This paper presents results of electromagnetic field measurement and evaluation in various MRI units in Bulgaria. The results show that the exposure limits for persons at specific risk are exceeded, as well as high values of the magnetic flux density of the static magnetic field up to 351 mT in the shielded room are registered. It should be noted here that for the personnel, a serious problem is the movement in inhomogeneous field conditions (in the shielded room), which in turn leads to induction of currents in the human body and, as a result, to transient symptoms such as vertigo and nausea occur. Measurement data are used to evaluate personnel exposure and to make specific recommendations for health and safety when dealing with such equipment in medical practice.
- ICNIRP Guidelines on limits of exposure to static magnetic fields, ICNIRP Publication – 2009, ICNIRP, Oberschleissheim, Germany, 2009.
Retrieved from: https://www.icnirp.org/cms/upload/publications/ICNIRPstatgdl.pdf
Retrieved on: Mar. 29, 2021 - ICNIRP Guidelines for limiting exposure to electric fields induced by movement of the human body in a static magnetic field and by time varying magnetic fields below 1 Hz, ICNIRP Publication – 2014, ICNIRP, Oberschleissheim, Germany, 2014.
Retrieved from: https://www.icnirp.org/cms/upload/publications/ICNIRPmvtgdl_2014.pdf
Retrieved on: Mar. 29, 2021 - ICNIRP statement on medical magnetic resonance (MR) procedures: protection of patients , ICNIRP Publication – 2004, ICNIRP, Oberschleissheim, Germany, 2004.
Retrieved from: https://www.icnirp.org/cms/upload/publications/ICNIRPMR2004.pdf
Retrieved on: Mar. 29, 2021 - Protection of Patients and Volunteers Undergoing MRI Procedures: Advice from the Health Protection Agency , Documents of the Health Protection Agency, Radiation, Chemical and Environmental Hazards RCE-7, HPA, London, UK, 2008.
Retrieved from: https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/329364/ Protection_of_patients_and_volunteers_undergoing_MRI_procedures.pdf
Retrieved on: Feb. 8, 2021 - H. Kromhout et al., “ICNIRP Statement on diagnostic devices using non-ionizing radiation: Existing regulations and potential health risks,” Health Phys., vol. 113, no. 2, pp. 149 – 150, Aug. 2017.
DOI: 10.1097/HP.0000000000000686
PMid: 28658061 - S. Bongers, P. Slottje, H. Kromhout, “Development of hypertension after long-term exposure to static magnetic fields among workers from a magnetic resonance imaging device manufacturing facility,” Environ. Res., vol. 164, pp. 565 – 573, Jul. 2018.
DOI: 10.1016/j.envres.2018.03.008
PMid: 29621724 - The European Parliament and the Council of the European Union. (Jun. 26, 2013). Directive 2013/35/EC of the European Parliament and of the Council on the minimum health and safety requirements regarding the exposure of workers to the risks arising from physical agents (electromagnetic fields) .
Retrieved from: https://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2013:179:0001:0021:EN:PDF
Retrieved on: Dec. 14, 2020 - The Council of European Union. (Jul. 12, 1999). Council Recommendation 1999/519/EC on the limitation of exposure of the general public to electromagnetic fields (0 Hz to 300 GHz).
Retrieved from: https://op.europa.eu/en/publication-detail/-/publication/9509b04f-1df0-4221-bfa2-c7af77975556/language-en
Retrieved on: Dec. 14, 2020 - Electromagnetic Fields, vol. 1, Non-binding guide to good practice for implementing Directive 2013/35/EU, European Commission, Brussels, Belgium, 2015.
Retrieved from: http://bookshop.europa.eu/en/non-binding-guide-to-good-practice-for-implementing-directive-2013-35-eu-electromagnetic-fields-pbKE0415140/
Retrieved on: Dec. 14, 2020 - Министерство на труда и социалната политика/Министерство на здравеопазването. (Ное. 26, 2016). Държавен вестник брой 95. Наредба № РД-07-5 от 15 ноември 2016 г. за минималните изисквания за осигуряване на здравето и безопасността на работещите при рискове, свързани с експозиция на електромагнитни полета. (Ministry of Labor and Social Policy/Ministry of Health. (Nov. 26, 2016). State gazette No. 95. Ordinance No RD-07-5 of 15 November 2016. for the minimal requirements for providing health and safety at work at risks by exposure to electromagnetic fields. )
Retrieved from: http://dv.parliament.bg/DVWeb/broeveList.faces#
Retrieved on: Dec. 14, 2020 - Medical electrical equipment - Part 2-33: Particular requirements for the basic safety and essential performance of magnetic resonance equipment for medical diagnosis, IEC 60601-2-33:2010, Mar. 10, 2010.
Retrieved from: https://webstore.iec.ch/publication/2647
Retrieved on: Jan. 11, 2021 - Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices, ACGIH, Cincinnati (OH), USA, 2008.