Direct X-ray Detectors Based on PDMS Films With Low Detection Limit and High Flexibility

Li, Yang; Chen, Hu; Zhao, Hang; Li, Zuhao; Wu, Xingyang; Zhang, Jianhua

doi:10.1109/led.2022.3205754

Cited by 4 publications

(1 citation statement)

References 29 publications

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“…SNR can be calculated as the ratio between the X-ray average photocurrent measured at each dose-rate value and the standard deviation of the dark current, as reported in the following equation:

where n is the number of acquisitions of the “X-ray on” (“X-ray off”) period for the numerator (denominator), and

is the average dark current. As can be seen from Figure 3 b, showing SNR as a function of the dose-rate, the evaluated LoD is only 23 nGy/s, which is remarkably comparable to the LoD values recently reported for state-of-the-art X-ray direct detectors based on organic materials [ 37 ] and perovskites [ 38 ]. To our knowledge, this is also the first time that LoD has been evaluated for a diamond-based X-ray dosimeter, and its suitability highlighted for radiation protection applications.…”

Section: Resultssupporting

confidence: 85%

A Highly Versatile X-ray and Electron Beam Diamond Dosimeter for Radiation Therapy and Protection

et al. 2023

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Radiotherapy is now recognized as a pillar in the fight against cancer. Two different types are currently used in clinical practice: (1) external beam radiotherapy, using high-energy X-rays or electron beams, both in the MeV-range, and (2) intraoperative radiotherapy, using low-energy X-rays (up to 50 keV) and MeV-range electron beams. Versatile detectors able to measure the radiation dose independently from the radiation nature and energy are therefore extremely appealing to medical physicists. In this work, a dosimeter based on a high-quality single-crystal synthetic diamond sample was designed, fabricated and characterized under low-energy X-rays, as well as under high-energy pulsed X-rays and electron beams, demonstrating excellent linearity with radiation dose and dose-rate. Detector sensitivity was measured to be 0.299 ± 0.002 µC/Gy under 6 MeV X-ray photons, and 0.298 ± 0.004 µC/Gy under 6 MeV electrons, highlighting that the response of the diamond dosimeter is independent of the radiation nature. Moreover, in the case of low-energy X-rays, an extremely low limit of detection (23 nGy/s) was evaluated, pointing out the suitability of the device to radiation protection dosimetry.

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“…SNR can be calculated as the ratio between the X-ray average photocurrent measured at each dose-rate value and the standard deviation of the dark current, as reported in the following equation:

where n is the number of acquisitions of the “X-ray on” (“X-ray off”) period for the numerator (denominator), and

Section: Resultssupporting

confidence: 85%

A Highly Versatile X-ray and Electron Beam Diamond Dosimeter for Radiation Therapy and Protection

et al. 2023

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Highly stable and sensitive polystyrene/carbon black-BiI3 composite for direct X-ray detector

Chaudhari,

Ravikant

2023

J Mater Sci: Mater Electron

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Physical constraints-based terahertz thickness measurement method of thermal barrier coating

Cao,

Deng,

Fan

et al. 2024

NDT & E International

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Direct X-ray Detectors Based on PDMS Films With Low Detection Limit and High Flexibility

Cited by 4 publications

References 29 publications

A Highly Versatile X-ray and Electron Beam Diamond Dosimeter for Radiation Therapy and Protection

A Highly Versatile X-ray and Electron Beam Diamond Dosimeter for Radiation Therapy and Protection

Highly stable and sensitive polystyrene/carbon black-BiI3 composite for direct X-ray detector

Physical constraints-based terahertz thickness measurement method of thermal barrier coating

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