Radiation hardness of the storage phosphor europium doped potassium chloride for radiation therapy dosimetry

Driewer, J; Chen, Haijian; Osvet, Andres; Low, Daniel A.; Li, H. Harold

doi:10.1118/1.3611043

Cited by 11 publications

(11 citation statements)

References 35 publications

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“…Figure 1 shows that the sensitivity increases by 15% with a cumulative dose of 5 kGy and then decreases with higher cumulated doses. These results correlate well with previous results [4]. Batentschuk et al [6] also reported a slight increase in PSL intensity for CsBr:Eu 2+ .…”

Section: Resultssupporting

confidence: 93%

“…Pellets of KCl:Eu 2+ (1 mm thick, 6 mm diameter) with 0.05 mole % Eu, were made using a hydraulic press using a procedure described earlier [4]. The XRLM4 beam line at the Center for Advanced Microstructures and Devices (CAMD) synchrotron facility at Louisiana State University was used for high dose irradiation of samples.…”

Section: Methodsmentioning

confidence: 99%

“…Dosimeter pellets were placed in a 0.5 cm thick slab machined with a linear array of holes across the center. PSL point measurements were obtained using a setup described earlier [4]. Low temperature measurements were obtained by placing dosimeters in a temperature-controlled cryostat (Model CCS-450, JANIS, Wilmington, MA).…”

Section: Methodsmentioning

confidence: 99%

“…The Z eff is 18, which is much closer to tissue than BaFBrI or CsBr. Further, we have shown that the luminescence properties of KCl:Eu 2+ remain optimal for cumulative doses of up to 3000 Gy which means that a KCl:Eu 2+ -based dosimeter can be used at least 1500 times in the clinic before any signal degradation occurs [4]. A radiation resilient dosimeter allows for less frequent dosimeter calibration and, as a result, reduces measurement uncertainty.…”

Section: Introductionmentioning

confidence: 99%

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X-ray storage performance of KCl:Eu2+ with high cumulated dose

Hansel

Xiao

Zhang

et al. 2014

Nuclear Instruments and Methods in Physics Research Section B:

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The effects of high cumulative radiation dose on the luminescence properties of KCl:Eu2+ are investigated. Pellet samples of KCl:Eu2+ were given doses of up to 200 kGy at the Louisiana State University Synchrotron facility. After synchrotron irradiation, samples were optically bleached and given a clinical dose of 2 Gy from a 6 MV medical linear accelerator. Optical properties were evaluated using photostimulated luminescence (PSL), photoluminescence (PL), and temperature-dependent PSL measurements. For a cumulated dose of up to 5–10 kGy, the PSL emission intensity increased by 15% compared to the PSL signal with no radiation history. For doses higher than 10 kGy, the PSL emission intensity retained at least 70% of the original intensity. Spatial correlation of the charge storage centers increased for doses up to 5 kGy and then decreased for higher cumulative doses. Emission band at 975 nm was attributed to transitions of Eu1+. PL spectra showed an intense peak centered at 420 nm for all cumulative doses. The results of this work show that KCl:Eu2+ storage phosphors are excellent reusable materials for radiation therapy dosimetry.

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Section: Resultssupporting

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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X-ray storage performance of KCl:Eu2+ with high cumulated dose

Hansel

Xiao

Zhang

et al. 2014

Nuclear Instruments and Methods in Physics Research Section B:

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“…Recent work (Han et al , 2009; Driewer et al , 2011) has shown that KCl:Eu 2+ has great potential for use in megavoltage radiation therapy dosimetry because this material exhibits excellent storage performance and is reusable due to strong radiation hardness. Hansel et al (Hansel et al , 2014; Hansel et al , 2013) report that KCl:Eu 2+ samples provide excellent signal even after they were given doses of up to 200 kGy at the Louisiana State University Synchrotron facility.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional high spatial-resolution dosimeter using europium doped potassium chloride: a feasibility study

Driewer

Han

et al. 2014

Phys. Med. Biol.

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Recent research has shown that KCl:Eu2+ has great potential for use in megavoltage radiation therapy dosimetry because this material exhibits excellent storage performance and is reusable due to strong radiation hardness. This work reports the authors’ attempts to fabricate 2D KCl:Eu2+ storage phosphor films (SPFs) using both a physical vapor deposition (PVD) method and a tape casting method. X ray diffraction analysis showed that a 10 µm thick PVD sample was composed of highly crystalline KCl. No additional phases were observed, suggesting that the europium activator had completed been incorporated into the KCl matrix. Photostimulated luminescence and photoluminescence spectra suggested that F (Cl-) centers were the electron storage centers post×ray irradiation and that Eu2+ cations acted as luminescence centers in the photostimulation process. The 150-µm thick casted KCl:Eu2+ SPF showed sub-millimeter spatial resolution. Monte Carlo simulations further demonstrated that the admixture of 20% KCl:Eu2+ and 80% low Z polymer binder exhibited almost no energy dependence in a 6 MV beam. KCl:Eu2+ pellet samples showed a large dynamic range from 0.01 cGy to 60 Gy dose-to-water, and saturated at approximately 500 Gy as a result of KCl’s intrinsic high radiation hardness. Taken together, this work provides strong evidence that KCl:Eu2+ based SPF with associated readout apparatus could result in a novel electronic film system that has all the desirable features associated with classic radiographic film and, importantly, water equivalence and the capability of permanent identification of each detector.

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Growth and Optical Characterization of Europium and Cerium Doped KCl Single Crystals by Czochralski Method for Dosimetric Applications

Krishnakumar

Rajesh²

2019

Journal of Elec Materi

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Radiation hardness of the storage phosphor europium doped potassium chloride for radiation therapy dosimetry

Cited by 11 publications

References 35 publications

X-ray storage performance of KCl:Eu2+ with high cumulated dose

X-ray storage performance of KCl:Eu2+ with high cumulated dose

Two-dimensional high spatial-resolution dosimeter using europium doped potassium chloride: a feasibility study

Growth and Optical Characterization of Europium and Cerium Doped KCl Single Crystals by Czochralski Method for Dosimetric Applications

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