Sensors 2012, 12(5), 6404-6414; doi:10.3390/s120506404
Article

Integral T-Shaped Phantom-Dosimeter System to Measure Transverse and Longitudinal Dose Distributions Simultaneously for Stereotactic Radiosurgery Dosimetry

1 School of Biomedical Engineering, College of Biomedical & Health Science, Research Institute of Biomedical Engineering, Konkuk University, 322 Danwol-dong, Chungju-si, Chungcheongbuk-do, 380-701, Korea 2 Department of Energy & Environment Engineering, College of Engineering, Soonchunhyang University, 646 Eupnae-ri, Shinchang-myeon, Asan-si, Chungcheongnam-do, 336-745, Korea
* Author to whom correspondence should be addressed.
Received: 12 March 2012; in revised form: 8 May 2012 / Accepted: 9 May 2012 / Published: 14 May 2012
(This article belongs to the Section Physical Sensors)
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Abstract: A T-shaped fiber-optic phantom-dosimeter system was developed using square scintillating optical fibers, a lens system, and a CMOS image camera. Images of scintillating light were used to simultaneously measure the transverse and longitudinal distributions of absorbed dose of a 6 MV photon beam with field sizes of 1 × 1 and 3 × 3 cm2. Each optical fiber has a very small sensitive volume and the sensitive material is water equivalent. This allows the measurements of cross-beam profile as well as the percentage depth dose of small field sizes. In the case of transverse dose distribution, the measured beam profiles were gradually become uneven and the beam edge had a gentle slope with increasing depth of the PMMA phantom. In addition, the maximum dose values of longitudinal dose distribution for 6 MV photon beam with field sizes of 1 × 1 and 3 × 3 cm2 were found to be at a depth of approximately 15 mm and the percentage depth dose of both field sizes were nearly in agreement at the skin dose level. Based on the results of this study, it is anticipated that an all-in-one phantom-dosimeter can be developed to accurately measure beam profiles and dose distribution in a small irradiation fields prior to carrying out stereotactic radiosurgery.
Keywords: fiber-optic dosimeter; phantom; absorbed dose; square scintillating optical fiber; radiosurgery

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MDPI and ACS Style

Yoo, W.J.; Moon, J.; Jang, K.W.; Han, K.-T.; Shin, S.H.; Jeon, D.; Park, J.-Y.; Park, B.G.; Lee, B. Integral T-Shaped Phantom-Dosimeter System to Measure Transverse and Longitudinal Dose Distributions Simultaneously for Stereotactic Radiosurgery Dosimetry. Sensors 2012, 12, 6404-6414.

AMA Style

Yoo WJ, Moon J, Jang KW, Han K-T, Shin SH, Jeon D, Park J-Y, Park BG, Lee B. Integral T-Shaped Phantom-Dosimeter System to Measure Transverse and Longitudinal Dose Distributions Simultaneously for Stereotactic Radiosurgery Dosimetry. Sensors. 2012; 12(5):6404-6414.

Chicago/Turabian Style

Yoo, Wook Jae; Moon, Jinsoo; Jang, Kyoung Won; Han, Ki-Tek; Shin, Sang Hun; Jeon, Dayeong; Park, Jang-Yeon; Park, Byung Gi; Lee, Bongsoo. 2012. "Integral T-Shaped Phantom-Dosimeter System to Measure Transverse and Longitudinal Dose Distributions Simultaneously for Stereotactic Radiosurgery Dosimetry." Sensors 12, no. 5: 6404-6414.

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