Development of One-dimensional Fiber-Optic Radiation Sensor for Measuring Dose Distributions of High Energy Photon Beams

In this study, we have fabricated a fiber-optic dosimeter using an organic scintillator and a plastic optical fiber for measuring percentage depth doses with radiotherapeutic high energy photon beams. The scintillating light generated in an organic dosimeter probe embedded in a solid water phantom is guided by a plastic optical fiber to the light-measuring device. Using this fiber-optic dosimeter, percentage depth doses are measured with 6 and 15 MV energies of photon beams whose field sizes are 2 x 2 and 10 x 10 cm2, and the results are compared with those measured using conventional dosimeters such as an ionization chamber and EBT films used in radiotherapy dosimetry.

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Performance Evaluation of One-dimensional Fiber-optic Radiation Sensor for Measuring High Energy Electron Beam Using a Charge-coupled Device

Journal of Nuclear Science and Technology ◽

10.1080/00223131.2008.10875894 ◽

2008 ◽

Vol 45 (sup5) ◽

pp. 477-480 ◽

Cited By ~ 2

Author(s):

Dong Hyun Cho ◽

Kyoung Won Jang ◽

Wook Jae Yoo ◽

Soon Cheol Chung ◽

Gye Rae Tack ◽

...

Keyword(s):

Electron Beam ◽

Performance Evaluation ◽

Fiber Optic ◽

High Energy ◽

Optic Radiation ◽

High Energy Electron ◽

Charge Coupled Device ◽

One Dimensional ◽

Radiation Sensor ◽

A Charge

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MEASUREMENTS OF HIGH ENERGY X-RAY DOSE DISTRIBUTIONS USING MULTI-DIMENSIONAL FIBER-OPTIC RADIATION DETECTORS

Modern Physics Letters B ◽

10.1142/s0217984908015401 ◽

2008 ◽

Vol 22 (11) ◽

pp. 797-802 ◽

Cited By ~ 2

Author(s):

KYOUNG WON JANG ◽

DONG HYUN CHO ◽

SANG HUN SHIN ◽

BONGSOO LEE ◽

SOON-CHEOL CHUNG ◽

...

Keyword(s):

Optical Fibers ◽

Fiber Optic ◽

Radiation Detectors ◽

High Energy ◽

Two Dimensional ◽

Optic Radiation ◽

Dose Distributions ◽

Detector Arrays ◽

One Dimensional ◽

X Ray

In this study, we have fabricated multi-dimensional fiber-optic radiation detectors with organic scintillators, plastic optical fibers and photo-detectors such as photodiode array and a charge-coupled device. To measure the X-ray dose distributions of the clinical linear accelerator in the tissue-equivalent medium, we have fabricated polymethylmethacrylate phantoms which have one-dimensional and two-dimensional fiber-optic detector arrays inside. The one-dimensional and two-dimensional detector arrays can be used to measure percent depth doses and surface dose distributions of high energy X-ray in the phantom respectively.

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High Resolution One-Dimensional Dose Measurement Using a Movable Miniature Fiber-Optic Radiation Sensor

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.321-323.992 ◽

2006 ◽

Vol 321-323 ◽

pp. 992-995 ◽

Cited By ~ 1

Author(s):

Bong Soo Lee ◽

Dong Hyun Cho ◽

Soon Cheol Chung ◽

Jeong Han Yi ◽

Kyung Won Chang ◽

...

Keyword(s):

Optical Fiber ◽

Dose Distribution ◽

Fiber Optic ◽

Light Output ◽

High Energy ◽

Optic Radiation ◽

Plastic Optical Fiber ◽

Silicon Photodiode ◽

One Dimensional ◽

Radiation Sensor

The aim of this study is to develop a new method to measure one-dimensional dose distribution of high-energy electron using a miniature fiber-optic radiation sensor. The measurements are made by a thin plastic optical fiber with an organic scintillating sensor tip. The scintillating light in the visible wavelength range is guided to a silicon photodiode by plastic optical fiber in order to convert light output to electrical signal. The one-dimensional spatial dependence of elctron beam is measured by moving the sensor tip with uniform speed. It is shown that this fiber-optic radiation sensor has better spatial resolution than conventional ion chamber and it needs much less time to measure one-dimensional dose distribution in the high radiation fields.

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