Health Risk Assessment of Occupational Exposure to a Magnetic Field From Magnetic Resonance Imaging Devices

• Autorzy: Karpowicz J. , Gryz K.
• Języki publikacji: EN

Abstrakty

EN

Health care staff who operate magnetic resonance imaging (MRI) devices are exposed to a static magnetic field of significant spatial heterogenity always produced by MRI magnets during the whole shift. They can also be exposed to pulses of a time-varying magnetic field (gradient field) present only during patients’ examinations. The level of the workers’ exposure depends both on the type of the magnet and on the ergonomic design of each MRI device. The paper presents methods used for measuring and assessing workers’ exposure. It also discusses the results of inspection measurements carried out next to approximately 20 MRI devices of approximately 0.2–2.0 T. The presented characteristic and overview of the variability of workers’ exposure to a variety of MRI devices supports the need for data on monitoring occupational exposure to MRI. International exposure assessment standards and guidelines (International Commission on Non-Ionizing Radiation Protection [ICNIRP], Institute of Electrical and Electronics Engineers [IEEE], American Conference of Governmental and Industrial Hygienists [ACGIH], European Commission directive), and those established in Poland are also compared.

Słowa kluczowe

EN

MRI; occupational exposure; electromagnetic fields; exposure assessment

PL

pole elektromagnetyczne; zagrożenia zdrowia; ocena ryzyka zawodowego; pole magnetyczne; narażenie zawodowe

• Wydawca: Taylor & Francis
• Czasopismo: International Journal of Occupational Safety and Ergonomics
• Rocznik: 2006
• Tom: Vol. 12, No. 2
• Strony: 155--167
• Opis fizyczny: Bibliogr. 19 poz., rys., tab., wykr

Twórcy

autor

Karpowicz J.

• Central Institute for Labour Protection – National Research Institute, Poland

autor

Gryz K.

• Central Institute for Labour Protection – National Research Institute, Poland

Bibliografia

• 1.Markisz J, Aquilia M. Technical magnetic resonance imaging. New York, NY, USA: Appleton & Lange; 1996.
• 2.Regulation of the Minister of Labour and Social Policy of 29 November 2002 on the maximum admissible concentrations and intensities for agents harmful to health in the working environment. Dz. U. 2002;217(item 1833):13614–60. In Polish. (First edition covering static magnetic field: Dz. U. 1995;69(item 351), revised in 2001).
• 3.Regulation of the Minister of Environment of 30 October 2003 on maximum admissible levels of electromagnetic fields in the environment and methods of checking compliance to these levels. Dz. U. 2003;192(item 1883):13006–12. In Polish.
• 4.Polish Standarisation Committee Polski Komitet Normalizacyjny (PKN). Labour protection in electromagnetic fields and radiation of the frequency range from 0 Hz to 300 GHz. Part 1: Terminology. Part 3. Methods of measurement and evaluation of the field on the work stands (Polish Standard No. PN-T-06580:2002). Warszawa, Poland: PKN; 2002. In Polish.
• 5.International Commission on Non-Ionizing Radiation Protection. Guidelines on limits of exposure to static magnetic. Health Phys. 1994;66(1);100–6.
• 6.Institute of Electrical and Electronics Engineers (IEEE). IEEE standard for safety levels with respect to human exposure to electromagnetic fields, 0–3 kHz (Standard No. C.95.6). New York, NY, USA: IEEE; 2002.
• 7.American Conference of Governmental and Industrial Hygienists (ACGIH). TLVs and BEIs. Based on the documentations for Threshold Limit Values for chemical substances and physical agents & Biological Exposure Indices. Cincinnati, OH, USA: ACGIH; 2005.
• 8.Directive 2004/40/EC of the European Parliament and of the Council of 29 April 2004 on the minimum health and safety requirements regarding the exposure of workers to the risks arising from physical agents (electromagnetic fields) (eighteenth individual Directive within the meaning of Article 16(1) of Directive 89/391/EEC). Official Journal of the European Union L 159, April 30, 2004. p. 1–26.
• 9.International Electrotechnical Commission (IEC). Medical electrical equipment. Part 2: Particular requirements for the safety of magnetic resonance equipment for medical diagnosis (Standard No. IEC-601-2-33:1995). Geneva, Switzerland: IEC; 1995.
• 10.Karpowicz J, Gryz K. Static and gradient magnetic fields of MRI systems—methods of evaluating occupational exposure used in Poland. In: Safety in health services—medical technology, radiation, electricity (ISSA Prevention Series 2043). Köln, Germany: International Social Security Association (ISSA); 2001. p. 118–21.
• 11.Korniewicz H, Gryz K, Karpowicz J. Method of measuring and evaluating occupational exposure to gradient magnetic fields of MRI systems. In: Polish Academy of Sciences, XI National Science Conference Biocybernetics and Biomedical Engineering, Warsaw, 1999. p. 368–72. Warszawa, Poland: Polska Akademia Nauk, Instytut Biocybernetyki i Inżynierii Biomedycznej. In Polish.
• 12.Reilly PJ. Applied bioelectricity. From electrical stimulation to electropathology, New York, NY, USA: Springer; 1998.
• 13.Jokela K. Restricting exposure to pulsed and broadband magnetic fields. Health Phys. 2000;79(4):373–88.
• 14.International Commission on Non-Ionizing Radiation Protection (ICNIRP). Guidance on determining compliance of exposure to pulsed and complex non-sinusoidal wave below 100 kHz with ICNIRP guidelines. Health Phys. 2003;44(4):494–522.
• 15.Polish Committee for Standardisation, Measurements and Quality Polski Komitet Normalizacji, Miar i Jakosci. Labour protection in magnetostatic field. Equipment and methods for measurements magnetostatic intensities (Polish Standard No. PN-90/T-06583:1990). Wydawnictwa Normalizacyjne ALFA; 1990. In Polish.
• 16.Centre for Testing and Measurement for Improvement of Safety of Products and Working Life. Final report, January 2006 [unpublished report]. Warszawa, Poland: Central Institute for Labour Protection – National Research Institute; 2006. In Polish.
• 17.International Organization for Standardization (ISO)/International Electrotechnical Commission (IEC). Proficiency testing by interlaboratory comparison—part 1: development and operation of proficiency testing schemes (ISO/IEC Guide No. 43-1:1997). Geneva, Switzerland: ISO; 1997.
• 18.Bassen H, Schaefer DJ, Zaremba L, Bushberg J, Ziskin M, Foster KR. IEEE Committee on Man and Radiation (COMAR) Technical Information Statement “Exposure of medical personnel to electromagnetic fields from open magnetic resonance imaging systems”. Health Phys. 2005;89(6):684–9.
• 19.ICNIRP statement on medical magnetic resonance (MR) procedures: protection of patients. Health Phys. 2004;87(2):197–216.