Measurement of Entrance Surface Dose on an Anthropomorphic Thorax Phantom Using a Miniature Fiber-Optic Dosimeter

A miniature fiber-optic dosimeter (FOD) system was fabricated using a plastic scintillating fiber, a plastic optical fiber, and a multi-pixel photon counter to measure real-time entrance surface dose (ESD) during radiation diagnosis. Under varying exposure parameters of a digital radiography (DR) system, we measured the scintillating light related to the ESD using the sensing probe of the FOD, which was placed at the center of the beam field on an anthropomorphic thorax phantom. Also, we obtained DR images using a flat panel detector of the DR system to evaluate the effects of the dosimeter on image artifacts during posteroanterior (PA) chest radiography. From the experimental results, the scintillation output signals of the FOD were similar to the ESDs including backscatter simultaneously obtained using a semiconductor dosimeter. We demonstrated that the proposed miniature FOD can be used to measure real-time ESDs with minimization of DR image artifacts in the X-ray energy range of diagnostic radiology.

[1]  R A Sutton,et al.  Water equivalence of plastic organic scintillators in megavoltage radiotherapy bremsstrahlung beams. , 2000, Physics in medicine and biology.

[2]  A. Huston,et al.  Characterization of a fiber-optic-coupled radioluminescent detector for application in the mammography energy range. , 2007, Medical physics.

[3]  Wook Jae Yoo,et al.  Fiber-optic Cerenkov radiation sensor for proton therapy dosimetry. , 2012, Optics express.

[4]  J. Dempsey,et al.  Plastic scintillator response to low-energy photons. , 1999, Physics in medicine and biology.

[5]  A. Beddar,et al.  Plastic scintillation dosimetry and its application to radiotherapy , 2006 .

[6]  Wook Jae Yoo,et al.  Simultaneous measurements of pure scintillation and Cerenkov signals in an integrated fiber-optic dosimeter for electron beam therapy dosimetry. , 2013, Optics express.

[7]  M. Speidel,et al.  Calibration of GafChromic XR-RV3 radiochromic film for skin dose measurement using standardized x-ray spectra and a commercial flatbed scanner. , 2011, Medical physics.

[8]  Wook Jae Yoo,et al.  Integral T-Shaped Phantom-Dosimeter System to Measure Transverse and Longitudinal Dose Distributions Simultaneously for Stereotactic Radiosurgery Dosimetry , 2012, Sensors.

[9]  Louis Archambault,et al.  Validating plastic scintillation detectors for photon dosimetry in the radiologic energy range. , 2012, Medical physics.

[10]  Mi-Sook Kim,et al.  Evaluation of the dosimetric characteristics of a radiophotoluminescent glass dosimeter for high-energy photon and electron beams in the field of radiotherapy , 2011 .

[11]  Wook Jae Yoo,et al.  Development of a scintillating fiber-optic dosimeter for measuring the entrance surface dose in diagnostic radiology , 2013 .

[12]  J. Oxtoby,et al.  Patient dose optimization in plain radiography based on standard exposure factors. , 2004, The British journal of radiology.

[13]  Bongsoo Lee,et al.  Water-equivalent one-dimensional scintillating fiber-optic dosimeter for measuring therapeutic photon beam. , 2012, Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine.

[14]  S. Shin,et al.  Development of a fiber-optic dosimeter based on modified direct measurement for real-time dosimetry during radiation diagnosis , 2013 .

[15]  H. S. Wolff,et al.  iRun: Horizontal and Vertical Shape of a Region-Based Graph Compression , 2022, Sensors.

[16]  J. Pouliot,et al.  Miniature scintillating detector for small field radiation therapy. , 1999, Medical physics.

[17]  D. Hyer,et al.  Characterization of a water-equivalent fiber-optic coupled dosimeter for use in diagnostic radiology. , 2009, Medical physics.

[18]  Wook Jae Yoo,et al.  Application of Cerenkov radiation generated in plastic optical fibers for therapeutic photon beam dosimetry , 2013, Journal of biomedical optics.

[19]  A. Jones,et al.  Potential clinical utility of a fibre optic-coupled dosemeter for dose measurements in diagnostic radiology. , 2008, Radiation protection dosimetry.

[20]  C. Proukakis,et al.  Differences in effective dose estimation from dose-area product and entrance surface dose measurements in intravenous urography. , 2001, The British journal of radiology.

[21]  T. Aoyama,et al.  A scintillating fiber beam-energy monitor for electron beam therapy. , 1995, Medical physics.

[22]  D. Peet,et al.  Evaluation of a MOSFET radiation sensor for the measurement of entrance surface dose in diagnostic radiology. , 1999, The British journal of radiology.

[23]  Louis Archambault,et al.  Clinical prototype of a plastic water-equivalent scintillating fiber dosimeter array for QA applications. , 2008, Medical physics.

[24]  B. McParland,et al.  Entrance skin dose estimates derived from dose-area product measurements in interventional radiological procedures. , 1998, The British journal of radiology.

[25]  T. Aoyama,et al.  A depth-dose measuring device using a multichannel scintillating fiber array for electron beam therapy. , 1997, Medical physics.