Comparison of the X-ray tube spectrum measurement using BGO, NaI, LYSO, and HPGe detectors in a preclinical mini-CT scanner: Monte Carlo simulation and practical experiment

Lohrabian, Vahid; Kamali-Asl, Alireza; Harvani, Hossein Ghadiri; Aghdam, Seyed Rashid Hosseini; Arabi, Hossein; Zaidi, Habib

doi:10.1016/j.radphyschem.2021.109666

Cited by 11 publications

(2 citation statements)

References 51 publications

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“…where S is the number of particles emitted by the source, N is the number of events below the total absorption peak, and Ω is the solid angle [11][12][13].…”

Section: Spectrometry Testmentioning

confidence: 99%

Study and Characterization of LiF Thin Film Combined with a Silicon Detector for Neutron Metrology

Brahimi¹,

Keffous

Haine

et al. 2023

Acta Phys. Pol. A

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The last decades have seen a lot of work and development on new methods of neutron detection that would replace 3 He gas-based detectors, a device widely used due to its efficiency, which is being phased out due to the scarcity of 3 He gas and its high cost. The work showed that a combination of inorganic materials (Si, 6 LiF) could represent a viable basis for the development of new generations of thermal neutron detectors. This type of device is based on a silicon detector coupled to 6 LiF thin film converters. In this work, a model has been developed based on the fabricated silicon detector with a Schottky surface barrier associated with different thicknesses of 6 LiF films. To study its behavior as a function of the different film thicknesses, the model was characterized using a thermal neutron flux from the source (AmBe-OB26). Preliminary results show that it is possible to measure low-energy neutrons with an average detection efficiency of about 1%, a sensibility of 10 ± 0.1 cps on the 3 H peak, and insensibility to gamma radiation < 10 −6 , with a thin films size of about 2 µm. In this paper, we will present a state of the art of detector design, an evaluation of its characteristics (efficiency, resolution, dead time, proper motion), and a clarification of the influence of other parameters on the shape of the spectrum, highlighting the possibility of improving its detection efficiency to make it high, with a gamma/neutron rejection capability comparable to the 3 He gas detector.

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“…where S is the number of particles emitted by the source, N is the number of events below the total absorption peak, and Ω is the solid angle [11][12][13].…”

Section: Spectrometry Testmentioning

confidence: 99%

Study and Characterization of LiF Thin Film Combined with a Silicon Detector for Neutron Metrology

Brahimi¹,

Keffous

Haine

et al. 2023

Acta Phys. Pol. A

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“…An equally effective photon absorber is Bi 4 Ge 3 O 12 (BGO), which further exhibits fewer afterglow emissions. Both materials have been reported as well in CT applications employing medical diagnostics X-ray spectral ranges [18][19][20][21]. Neither of them suffers from hygroscopicity.…”

Section: Introductionmentioning

confidence: 99%

Luminescence Efficiency of Cerium Bromide Single Crystal under X-ray Radiation

et al. 2022

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A rare-earth trihalide scintillator, CeBr3, in 1 cm edge cubic monocrystal form, is examined with regard to its principal luminescence and scintillation properties, as a candidate for radiation imaging applications. This relatively new material exhibits attractive properties, including short decay time, negligible afterglow, high stopping power and emission spectrum compatible with several commercial optical sensors. In a setting typical for X-ray radiology (medical X-ray tube, spectra in the range 50–140 kVp, human chest equivalent filtering), the crystal’s light energy flux, absolute efficiency (AE) and X-ray luminescence efficiency (XLE) were determined. Light energy flux results are superior in comparison to other four materials broadly used in modern medical imaging (slope of the linear no-threshold fit was 29.5). The AE is superior from 90 kVp onwards and reaches a value of 29.5 EU at 140 kVp. The same is true for the XLE that, following a flat response, reaches 9 × 10−3 at 90 kVp. Moreover, the spectral matching factors and the respective effective efficiencies (EE) are calculated for a variety of optical sensors. The material exhibits full compatibility with all the flat-panel arrays and most of the photocathodes and Si PMs considered in this work, a factor that proves its suitability for use in state-of-the-art medical imaging applications, such as CT detectors and planar arrays for projection imaging.

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Calculating off-axis efficiency of coaxial HPGe detectors by Monte Carlo simulation

Omer

Shizuma

Hajima

et al. 2022

Radiation Physics and Chemistry

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Comparison of the X-ray tube spectrum measurement using BGO, NaI, LYSO, and HPGe detectors in a preclinical mini-CT scanner: Monte Carlo simulation and practical experiment

Cited by 11 publications

References 51 publications

Study and Characterization of LiF Thin Film Combined with a Silicon Detector for Neutron Metrology

Study and Characterization of LiF Thin Film Combined with a Silicon Detector for Neutron Metrology

Luminescence Efficiency of Cerium Bromide Single Crystal under X-ray Radiation

Calculating off-axis efficiency of coaxial HPGe detectors by Monte Carlo simulation

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