Assessment of exposure to X - rays during patient positioning at the proton eye radiotherapy facility at IFJ PAN, Kraków

• Autorzy: Adamczyk D. , Dulny B. , Horwacik T. , Swakoń J. , Olko P.
• Języki publikacji: EN

Abstrakty

EN

At the Institute of Nuclear Physics of the Polish Academy of Sciences (IFJ PAN, Kraków, Poland) the proton eye radiotherapy facility has recently been developed and is now fully operational. A set of two X-ay RAD-14 Varian medical systems tubes are used to obtain orthogonal images of the patient’s eyeball undergoing radiotherapy with tantalum clips already attached to its surface to delineate the tumour volume. We assessed the dose received by the patient from multiple X-ray exposures during the patient positioning procedure. Measurements of Kair were performed using various types of ionization chambers and MCP-N thermoluminescent (TL) detectors and calculated using the PCXMC code. Good agreement between measurements and calculations was found. The mean absorbed dose to the brain was measured using TL detectors placed inside the head of a Rando anthropomorphic phantom used in simulation of the patient positioning procedure. The measured maximum incident air kerma absorbed during the entire procedure of patient positioning was found not to exceed 7 mGy, while the mean absorbed dose to the brain did not exceed 2 mSv.

Słowa kluczowe

EN

eye proton therapy; exposure assessment; patient positioning

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2012
• Tom: Vol. 57, No. 1
• Strony: 109--115
• Opis fizyczny: Bibliogr. 16 poz., rys.

Twórcy

autor

Adamczyk D.

autor

Dulny B.

autor

Horwacik T.

autor

Swakoń J.

autor

Olko P.

• The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences (IFJ PAN), 152 Radzikowskiego Str., 31-342 Kraków, Poland, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. Decree of the Polish Cabinet (Minister of Health) concerning conditions of safe application of ionizing radiation for all types of medical exposures (2011) Dz U (Law Gazette) 18 February 2011, no 51, item 265 (in Polish)
• 2. Engel-Hills P (2006) Radiation protection in medical imaging. Radiography 12:153–160
• 3. Khelassi-Toutaouil N, Berkanil Y, Tsapaki V et al. (2008) Experimental evaluation of PCXMC and PREPARE codes used in conventional radiology. Radiat Prot Dosim 131;3:374–378
• 4. Martin CJ, Sutton DG, Sharp PF (1999) Balancing patient dose and image quality. Appl Radiat Isot 50:1–19
• 5. Olko P (2002) Microdosimetric modelling of physical and biological detectors. Habilitation Thesis. Report no. 1914/D. IFJ PAN, Kraków 6. PCXMC User’s guide, Stuck – Radiation and Nuclear Safety Authority, Finland
• 7. Poludniowski G, Landry G, DeBlois F, Evans PM, Verhaegen F (2009) SpekCalc: a program to calculate photon spectra from tungsten anode X-ray tubes. Phys Med Biol 54:N433
• 8. PTW Freiburg Instruction Manual 1000 cm3 Spherical Chamber Type TM32002
• 9. PTW Freiburg Instruction Manual 0.3 cm3 Spherical Chamber Type 31013
• 10. PTW Freiburg Instruction Manual Ionization Chambers Type 31002 and Type 31003
• 11. RTI Electronics AB User Manual Ortigo QA Software for Barracuda and Piranha. Manual – English – Version 6.0A
• 12. Tapiovaara M, Siiskonen T (2008) PCXMC 2.0 User’s Guide, STUK-TR 7
• 13. Wall BF (2004) Radiation protection dosimetry for diagnostic radiology patients. Radiat Prot Dosim 109;4:409–419
• 14. Wambersie A (2005) Patient dosimetry for X-rays used in medical imaging. J ICRU 5;2:I (doi:10.1093/jicru/ndi017)
• 15. Zoetelief J, Julius HW, Christen P (2003) Recommendations for patient dosimetry in diagnostic radiology using thermoluminescence dosimetry. International Commission on Radiation Units and IAEA activities. In: Proc of the Int Symp on Standards and Codes of Practice in
• Medical Radiation Dosimetry, 25–28 November 2002. IAEA-CN-96/49P. IAEA, Vienna, pp 439–447
• 16.Zoetelief J, Pernička F, Carlsson GA et al. (2003) Dosimetry in diagnostic and interventional radiology. International Commission on Radiation Units and IAEA activities. In: Proc of the Int Symp on Standards and Codes of Practice in Medical Radiation Dosimetry, 25–28 November 2002. IAEA-CN-96/39. IAEA, Vienna, pp 387–404