EXPOSURE LEVELS OF PATIENTS DURING COMPUTED TOMOGRAPHY IN MEDICAL ORGANIZATIONS OF SAINT-PETERSBURG AND LENINGRAD REGION

Were carried out the selective investigation of the adult patients exposure levels during radiological diagnostic  procedures  with  the  use  of  17  CT  scanners  in  15  medical  organizations  of  Saint-Petersburg  and Leningrad region in 2009–2012. We collected the data on technical parameters of the X-ray computed tomography examinations affecting the level of patient exposure. The effective doses were calculated for scanning of different areas of the patient's body (skull, thorax, abdomen and pelvis). Their mean values were in the range from 0,2 mSv to 31 mSv per examination. The highest doses were observed during the investigation of the abdomen and pelvis. Preliminary values of diagnostic reference levels are proposed for medical organizations of Saint-Petersburg andLeningrad region on the basis of investigation results. These values are defined as the 75% quantile in the distribution  of  dose  length  product  values.  Diagnostic  reference  levels  values  obtained  in  the  investigation  are comparable with the corresponding values currently accepted in the foreign medical practice.

1. Календер, В. Компьютерная томография. – М.: Техносфера, 2006. – 344 с.

2. Барышков, Н.И Дозы облучения населения Российской Федерации в 2012 г. : cправочник / Н.И.Барышков, А.А. Братилова, Т.А. Кормановская [и др.]. – СПб., 2013. – 68 с.

3. United Nations Scientific Committee on the Effects of Atomic Radiation United Nations (UNSCEAR UN). Sources and Effects of Ionizing Radiation. UNSCEAR 2008 Report, Volume I, Annex A. – NY.: United Nations, 2010. – 220 p.

4. ICRP. Managing patient dose in computed tomography. Publication ICRP 87 // Ann. ICRP. – 2000. – V. 30 (4)

5. Методические указания. Контроль эффективных доз облучения пациентов при проведении медицинских рентгенологических исследований (МУ 2.6.1.2944-11) – М.: Роспотребнадзор, 2011. – 32 с.

6. Методические рекомендации.Заполнение форм федерального государственного статистического наблюдения № 3-ДОЗ. – М.: Роспотребнадзор, 2007. – 23 с.

7. ЕС. Radiation Protection 154. Europien guidance on estimating population doses from medical x-ray procedures. European Communities. – Brussels, Luxembourg, 2008. – P. 90–96.

8. NRPB. Shrimpton, P.C. Dose for computed Tomography (CT). Examinations in UK – 2003 Review / P.C. Shrimpton – Document NRPB-W67. Chilton, 2005. – P. 103–107.

9. Council Directive 97/43/EURATOM of 30 June 1997 on health protection of individuals against the dangers of ionising radiation in relation to medical exposure // Official Journal of the European Commission. – No L 180. – P. 6.

10. Радиологическая защита при медицинском облучении ионизирующим излучением : руководство по безопасности № RS-G-1.5. – Вена: МАГАТЭ, 2004. – 75 c.

11. Guidance on Diagnostic Reference Levels (DRLs) for Medical Exposures. Radiation Protection 109. Directorate-General, Environment, Nuclear Safety and Civil Protection. – European Commission, 1999.

12. ЕС. Radiation Protection 118. Referal guidelines for imaging. European Communities. – Brussels, Luxembourg, 2001. – 160 p.

13. Методические рекомендации. Применение референтных диагностических уровней для оптимизации радиационной защиты пациента в рентгенологических исследованиях общего назначения (МР-2.6.1.0066-12). – М., 2012. – 25 c.

14. ЕС. European guidelines on quality criteria for computed tomography, Report EUR 16262 EN. European Commission. – Brussels, Luxembourg, 1999. – P. 107–114.

15. Требования безопасности: Радиационная защита и безопасность источников излучения. Международные основные нормы безопасности. Серия изданий МАГАТЭ по безопасности № 115. – Вена, 2011