Abstract
In present study, water phantom performances of using 6 and 18 MV photon beams were investigated. For this purpose, several data obtained form percent depth dose graphics and dose profiles were compared to each other. It was determined that the differences between the values were generally found within the limits. In the end of study, it was seen that semiconductor diodes and cylindrical ion chambers can be used interchangeably. But, there are some dozimetric differences between both detectors because of different detector structures. Choice of the detector can be made by taking into account these differences
Keywords
References
- Berniera J., Horiotb J.C., Poortmansc P., 2002. Quality assurance in radiotherapy: from radiation physics to patientand trial-oriented control procedures, European Journal of Cancer, 38: 155- 158.
- Horiot J.C, van der Schueren E., Johansson K.A., 1994. Quality assurance in radiotherapy. In Tobias JS, Thomas PRM, eds. Current Radiation Oncology, Vol. 1. London, Edward Arnold, 365-381.
- Konopacka M., Rogolinski J., Slosarek K., 2011. Direct and bystander effects induced by scattered radiation generated during penetration of radiation inside a water-phantom, Mutation Research, 721: 6–14.
- Słyk M., Litoborski M., 2010. VeriŞcation in the water phantom of the irradiation time calculation done by the algorithm used in intraoperative radiotherapy, Reports of Practical Oncology and Radiotherapy, 15:132–137.
- Sidhu, N.P.S,1999. Interfacing a linear diode array to a conventional water scanner for the measurement of dynamic dose distributions and comparison with a linear ion chamber array, Medical Dosimetry, 24(1): 57-60.
- Ziebell A.L, Clasiec, B., Wroe, A. 2011. Solid state diode e Ionization chamber method for measuring out-of-Şeld neutron dose in proton therapy, Radiation Measurements, 46 (12): 1638- 1642.
- IEC (International Electrotechnical Commision) Medical electrical equipment-Medical electron accelerator. Functional performance characteristics. 1989. IEC publication 979, IEC, Geneva.
- International Commission on Radiation Units. Determination of Absorbed Dose in a Patient Irradiated by Beams of X- or gamma rays in radiotherapy procedure. 1976. ICRU Report 24, Washington, DC. International Commission on Radiation Units & Measurements :54.
- Huyskens, D., Bogaerts, R., Verstraete, J. 2001. Partical guidelines for the implementation of in vivo dosimetry with diodes in external radiotherapy with photon beams (entrance dose), ESTRO Estro Booklet on Physics for clinical radiotherapy N 85.
- Khan F.M., 2003. The Physics of Radiation Therapy. Williams & Wilkins; Minnesota. Sayfa 148- 151.
- AAPM (American Association of Physicists in Medicine), Task Group 62: Diode in vivo dosimetry for patients receiving external beam irradiation therapy. 2005. Medical physics publishing, Madison WI.
- Serkan Okay e-posta: serkanokay@hotmail.com
- Bayram Demir e-posta: bayramdemir69@yahoo.com
- Asuman Öztaş e-posta: asumankaynar@yahoo.com
Radyoterapi Işınlarının Kalite Kontrolünde Yarı İletken Diyot ve Silindirik İyon Odası Performanslarının Karşılaştırılması
Abstract
Bu çalışmada; 6 ve 18 MV foton ışınları kullanılarak yarı iletken diyotlar ve silindirik iyon odalarının su fantomunu performansları incelenmiştir. Bu amaçla, yüzde derin doz ve doz profillerinden elde edilen çeşitli veriler bir birleri ile karşılaştırıldı. De_erler arasındaki farklar genel olarak limitler içinde tespit edilmiştir. Çalışmanın sonucunda diyot ve iyon odası tipindeki detektörlerin her ikisinin de su fantomu ile yapılan rutin ölçümlerde kullanılabileceği görülmüştür. Fakat detektör yapılarının tamamen farklı oluşu sebebiyle aralarında bazı dozimetrik farklar mevcuttur. Bu farklar gözetilerek detektör kullanımları arasında tercih yapılabilir.
Anahtar kelimeler: Diyot, iyon odası, radyoterapi, dozimetri
A Comparison for the Performances of Semiconductor Diodes and Cylindrical Ion Chambers in the Quality Control of Radiotherapy Beams
Abstract: In present study, water phantom performances of using 6 and 18 MV photon beams were investigated. For this purpose, several data obtained form percent depth dose graphics and dose profiles were compared to each other. It was determined that the differences between the values were generally found within the limits. In the end of study, it was seen that semiconductor diodes and cylindrical ion chambers can be used interchangeably. But, there are some dozimetric differences between both detectors because of different detector structures. Choice of the detector can be made by taking into account these differences.
Key words: Diode, ion chamber, radiotherapy, dosimetry
Keywords
References
- Berniera J., Horiotb J.C., Poortmansc P., 2002. Quality assurance in radiotherapy: from radiation physics to patientand trial-oriented control procedures, European Journal of Cancer, 38: 155- 158.
- Horiot J.C, van der Schueren E., Johansson K.A., 1994. Quality assurance in radiotherapy. In Tobias JS, Thomas PRM, eds. Current Radiation Oncology, Vol. 1. London, Edward Arnold, 365-381.
- Konopacka M., Rogolinski J., Slosarek K., 2011. Direct and bystander effects induced by scattered radiation generated during penetration of radiation inside a water-phantom, Mutation Research, 721: 6–14.
- Słyk M., Litoborski M., 2010. VeriŞcation in the water phantom of the irradiation time calculation done by the algorithm used in intraoperative radiotherapy, Reports of Practical Oncology and Radiotherapy, 15:132–137.
- Sidhu, N.P.S,1999. Interfacing a linear diode array to a conventional water scanner for the measurement of dynamic dose distributions and comparison with a linear ion chamber array, Medical Dosimetry, 24(1): 57-60.
- Ziebell A.L, Clasiec, B., Wroe, A. 2011. Solid state diode e Ionization chamber method for measuring out-of-Şeld neutron dose in proton therapy, Radiation Measurements, 46 (12): 1638- 1642.
- IEC (International Electrotechnical Commision) Medical electrical equipment-Medical electron accelerator. Functional performance characteristics. 1989. IEC publication 979, IEC, Geneva.
- International Commission on Radiation Units. Determination of Absorbed Dose in a Patient Irradiated by Beams of X- or gamma rays in radiotherapy procedure. 1976. ICRU Report 24, Washington, DC. International Commission on Radiation Units & Measurements :54.
- Huyskens, D., Bogaerts, R., Verstraete, J. 2001. Partical guidelines for the implementation of in vivo dosimetry with diodes in external radiotherapy with photon beams (entrance dose), ESTRO Estro Booklet on Physics for clinical radiotherapy N 85.
- Khan F.M., 2003. The Physics of Radiation Therapy. Williams & Wilkins; Minnesota. Sayfa 148- 151.
- AAPM (American Association of Physicists in Medicine), Task Group 62: Diode in vivo dosimetry for patients receiving external beam irradiation therapy. 2005. Medical physics publishing, Madison WI.
- Serkan Okay e-posta: serkanokay@hotmail.com
- Bayram Demir e-posta: bayramdemir69@yahoo.com
- Asuman Öztaş e-posta: asumankaynar@yahoo.com
Details
| Primary Language | Turkish |
|---|---|
| Subjects | Metrology, Applied and Industrial Physics |
| Journal Section | Makaleler |
| Authors | |
| Publication Date | December 5, 2013 |
| Published in Issue | Year 2013 Volume: 8 Issue: 2 |
