Measurement uncertainty analysis of radiophotoluminescent glass dosimeter reader system based on GD-352M for estimation of protection quantity

Kim, Jae‐Seok; Park, Byeong Ryong; Yoo, Jaeryong; Ha, Wi Ho; Jang, Saebyeol; Jang, Won Il; Cho, Gyu Seok; Kim, Hyun; Chang, Insu; Kim, Yong Kyun

doi:10.1016/j.net.2021.08.016

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…The PLD reader system comprises a glass dosimeter (GD-352M, AGC Techno Glass Co., LTD) and an automatic reader unit (FGD-1000, AGC Techno Glass Co., LTD.) [ 17 ]. The glass dosimeter has a diameter of 1.5 mm and a length of 12 mm.…”

Section: Methodsmentioning

confidence: 99%

Reduction of Radiation Dose to Eye Lens in Cerebral 3D Rotational Angiography Using Head Off-Centering by Table Height Adjustment: A Prospective Study

Ryu

Yoon

Kim³

et al. 2023

Korean J Radiol

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Objective Three-dimensional rotational angiography (3D-RA) is increasingly used for the evaluation of intracranial aneurysms (IAs); however, radiation exposure to the lens is a concern. We investigated the effect of head off-centering by adjusting table height on the lens dose during 3D-RA and its feasibility in patient examination. Materials and Methods The effect of head off-centering during 3D-RA on the lens radiation dose at various table heights was investigated using a RANDO head phantom (Alderson Research Labs). We prospectively enrolled 20 patients (58.0 ± 9.4 years) with IAs who were scheduled to undergo bilateral 3D-RA. In all patients’ 3D-RA, the lens dose-reduction protocol involving elevation of the examination table was applied to one internal carotid artery, and the conventional protocol was applied to the other. The lens dose was measured using photoluminescent glass dosimeters (GD-352M, AGC Techno Glass Co., LTD), and radiation dose metrics were compared between the two protocols. Image quality was quantitatively analyzed using source images for image noise, signal-to-noise ratio, and contrast-to-noise ratio. Additionally, three reviewers qualitatively assessed the image quality using a five-point Likert scale. Results The phantom study showed that the lens dose was reduced by an average of 38% per 1 cm increase in table height. In the patient study, the dose-reduction protocol (elevating the table height by an average of 2.3 cm) led to an 83% reduction in the median dose from 4.65 mGy to 0.79 mGy ( P < 0.001). There were no significant differences between dose-reduction and conventional protocols in the kerma area product (7.34 vs. 7.40 Gy·cm 2 , P = 0.892), air kerma (75.7 vs. 75.1 mGy, P = 0.872), and image quality. Conclusion The lens radiation dose was significantly affected by table height adjustment during 3D-RA. Intentional head off-centering by elevation of the table is a simple and effective way to reduce the lens dose in clinical practice.

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Section: Methodsmentioning

confidence: 99%

Reduction of Radiation Dose to Eye Lens in Cerebral 3D Rotational Angiography Using Head Off-Centering by Table Height Adjustment: A Prospective Study

Ryu

Yoon

Kim³

et al. 2023

Korean J Radiol

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“…The mechanism of RPL has been studied with the efforts of various researchers, and the difference between it and both Thermally Stimulated Luminescence (TSL) and Optically Stimulated Luminescence (OSL) have been clari ed [10]. Commercialized Ag-doped glass is in a small size for portability with potential as a candidate group for passive solid-state dosimeters [11]. Recently, post-radiation measurement studies using confocal as uorescent nuclear track detection are also attracting attention [12].…”

Section: Introductionmentioning

confidence: 99%

A hybrid real-time radiation monitoring system by utilizing RPL glass for proton beam profile measurement

Cho

Jegal

Jeong

et al. 2022

Preprint

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A precise measurement of radiation energy corresponding to position is important in radiation monitoring as well as proton therapy technique utilizing a particle accelerator. Proton Bragg peak makes it possible to modulate dose distribution in target by charged particle energy loss. We develop and test a real-time system using radio-photoluminescence (RPL) glass for accelerator particle beam tuning. The RPL glass has promising characteristics, such as a linear dosimeter equivalent to ionizing irradiation, no fading, data accumulation, and repeatability through thermal treatment. Utilizing this system, the energy deposit of the proton beam irradiated RPL glass is measured under an ultraviolet (UV) excitation source in real-time. 45 MeV and 100 MeV proton beams are generated from a cyclotron and a linear accelerator respectively. The proton Bragg curve corresponding to the proton energy and RPL is verified by GEANT4 simulation. This system promises to provide useful information on beam tuning techniques and quality verification through real-time radiation monitoring and recordings of the accumulated dose on repeatable RPL glass.

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“…Patient-specific dosimetric quality assurance (DQA) measurements are always performed to verify that radiation is accurately irradiated based on the patient treatment plan to guarantee the accuracy of such treatment. Here, patientspecific DQA is conducted using a solid detector such as a slit-type PMMA phantom, ionization chamber, film, or glass dosimeter or using an array-type detector and phantom composed of a single material into which the detector can be inserted [5][6][7][8]. A patient treatment plan follows a threedimensional (3D) dose distribution because it is conducted in three dimensions, whereas the commonly used method is limited to evaluating a fragmentary dose distribution by measuring a one-(1D) or two-dimensional (2D) dose distribution.…”

Section: Introductionmentioning

confidence: 99%

Dosimetric Study Using Patient-Specific Three-Dimensional-Printed Head Phantom with Polymer Gel in Radiation Therapy

Choi

Kim

et al. 2021

Progress in Medical Physics

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In this study, we aimed to manufacture a patient-specific gel phantom combining threedimensional (3D) printing and polymer gel and evaluate the radiation dose and dose profile using gel dosimetry. Methods:The patient-specific head phantom was manufactured based on the patient's computed tomography (CT) scan data to create an anatomically replicated phantom; this was then produced using a ColorJet 3D printer. A 3D polymer gel dosimeter called RTgel-100 is contained inside the 3D printing head phantom, and irradiation was performed using a 6 MV LINAC (Varian Clinac) X-ray beam, a linear accelerator for treatment. The irradiated phantom was scanned using magnetic resonance imaging (Siemens) with a magnetic field of 3 Tesla (3T) of the Korea Institute of Nuclear Medicine, and then compared the irradiated head phantom with the dose calculated by the patient's treatment planning system (TPS). Results:The comparison between the Hounsfield unit (HU) values of the CT image of the patient and those of the phantom revealed that they were almost similar. The electron density value of the patient's bone and brain was 996±167 HU and 58±15 HU, respectively, and that of the head phantom bone and brain material was 986±25 HU and 45±17 HU, respectively. The comparison of the data of TPS and 3D gel revealed that the difference in gamma index was 2%/2 mm and the passing rate was within 95%.Conclusions: 3D printing allows us to manufacture variable density phantoms for patient-specific dosimetric quality assurance (DQA), develop a customized body phantom of the patient in the future, and perform a patient-specific dosimetry with film, ion chamber, gel, and so on.

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Measurement uncertainty analysis of radiophotoluminescent glass dosimeter reader system based on GD-352M for estimation of protection quantity

Cited by 10 publications

References 22 publications

Reduction of Radiation Dose to Eye Lens in Cerebral 3D Rotational Angiography Using Head Off-Centering by Table Height Adjustment: A Prospective Study

Reduction of Radiation Dose to Eye Lens in Cerebral 3D Rotational Angiography Using Head Off-Centering by Table Height Adjustment: A Prospective Study

A hybrid real-time radiation monitoring system by utilizing RPL glass for proton beam profile measurement

Dosimetric Study Using Patient-Specific Three-Dimensional-Printed Head Phantom with Polymer Gel in Radiation Therapy

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