INFLUENCE OF COMPENSATOR THICKNESS AND FIELD SIZE ON THE EFFECTIVE ATTENUATION COEFFICIENT OF A BRASS COMPENSATOR FOR INTENSITY-MODULATED RADIATION THERAPY

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BALVASI E.; HAGHPARAST A.; HEJAZI P.

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Title

INFLUENCE OF COMPENSATOR THICKNESS AND FIELD SIZE ON THE EFFECTIVE ATTENUATION COEFFICIENT OF A BRASS COMPENSATOR FOR INTENSITY-MODULATED RADIATION THERAPY

Author(s)

BALVASI E. | HAGHPARAST A. | HEJAZI P. | Issue Writer Certificate

Keywords

INTENSITY MODULATED RADIATION THERAPYQ1

COMPENSATORSQ1

BRASSQ1

EFFECTIVE ATTENUATION COEFFICIENTQ1

Abstract

One of the INTENSITY MODULATED RADIATION THERAPY (IMRT) methods is based on using COMPENSATORS. The most important factor in designing a compensator is the accurate calculation of its thickness to achieve the intensity modulation of interest. To achieve that, the exact attenuation coefficient of compensator materials must be calculated. Using Map CHECK 2 model 1177 and phantom (SP34). We studied the effect of compensator thickness and field size on the calculation of the EFFECTIVE ATTENUATION COEFFICIENT (EAC) of the BRASS compensator for 6-MV photon beams. Experimental measurements were carried out at 100 cm source-to-surface distance and 5 cm depth for the 6-MV photon beams of an Elekta linac using various field size and compensator thickness. The field sizes investigated ranged from 1×1 cm2 to 20×20 cm2 and the BRASS compensator thickness from 0.5-6 cm. Our results indicated that the compensator thickness and field size have the most significant effect on the calculation of the compensator EAC for the 6-MV photon beam and also these parameters can reduce the error due to delivered dose to target volume and organs at risk.

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APA: Copy

BALVASI, E., HAGHPARAST, A., & HEJAZI, P.. (2016). INFLUENCE OF COMPENSATOR THICKNESS AND FIELD SIZE ON THE EFFECTIVE ATTENUATION COEFFICIENT OF A BRASS COMPENSATOR FOR INTENSITY-MODULATED RADIATION THERAPY. JOURNAL OF ILAM UNIVERSITY OF MEDICAL SCIENCES, 24(4), 61-70. SID. https://sid.ir/paper/90159/en

Vancouver: Copy

BALVASI E., HAGHPARAST A., HEJAZI P.. INFLUENCE OF COMPENSATOR THICKNESS AND FIELD SIZE ON THE EFFECTIVE ATTENUATION COEFFICIENT OF A BRASS COMPENSATOR FOR INTENSITY-MODULATED RADIATION THERAPY. JOURNAL OF ILAM UNIVERSITY OF MEDICAL SCIENCES[Internet]. 2016;24(4):61-70. Available from: https://sid.ir/paper/90159/en

IEEE: Copy

E. BALVASI, A. HAGHPARAST, and P. HEJAZI, “INFLUENCE OF COMPENSATOR THICKNESS AND FIELD SIZE ON THE EFFECTIVE ATTENUATION COEFFICIENT OF A BRASS COMPENSATOR FOR INTENSITY-MODULATED RADIATION THERAPY,” JOURNAL OF ILAM UNIVERSITY OF MEDICAL SCIENCES, vol. 24, no. 4, pp. 61–70, 2016, [Online]. Available: https://sid.ir/paper/90159/en

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