The comparison of a thin-film ZnO nanodevice with silicon-based electronic devices for diagnostic X-ray beam detection

Valença, Claudia P. V.; Filho, Luiz C. Gonçalves; Alves, Aline N.; Macêdo, M.A.; Souza, Divanízia do Nascimento; Santos, Luiz A. P.; Santos, Daniel A. A.

doi:10.1080/10420150.2022.2073878

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…7 and Fig 8 . Note that, although the responses of each type of detector closely resemble the response of the reference detector, the signal produced by the PET detector is weaker than the signal produced by the MOSFET. Actually, if the latter is compared with other silicon semiconductor devices, a MOSFET has the weakest signal than a BJT or phototransistor, for example [6]. However, the PET detector signal is about 20-40 dB stronger than a typical ionization chamber.…”

Section: Resultsmentioning

confidence: 99%

An innovative detector for X-ray beams made of polyethylene terephthalate built in a 3D printer

Gomes,

Silva,

Santos

2023

EPJ Web Conf.

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3D printers have been increasingly used to create different objects and tools for the most diverse areas of knowledge. In this paper, we bring results of the response of an X-ray detector that was made on a 3D printer with polyethylene terephthalate glycol (PET-G) material. The manufacturing process has practically two steps, which consists of building a composite of two materials: a build-up cap made of PET-G; and a semiconductor film made of carbon-doped PET. The experimental methods performed were basically to compare the signals from the new PET-based X-ray detector with the signals from typical detectors. Clinical X-ray beams were used to test such an innovative detector. Two X-ray tube parameters were varied to analyse the response of the PET-based X-ray detector: potential (kV) and workload (mAs). The study points out the PET-G detector works and is easy to manufacture, although the signal is weaker than a typical semiconductor detector. Also, the noise signal is at least one order of magnitude smaller than silicon detectors. Furthermore, the density of PET is almost equivalent to human tissue, which is an advantage for dosimetry in phantoms. Finally, such a detector could become an option for X-ray beams in the near future.

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Section: Resultsmentioning

confidence: 99%

An innovative detector for X-ray beams made of polyethylene terephthalate built in a 3D printer

Gomes,

Silva,

Santos

2023

EPJ Web Conf.

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“…Na área de dosimetria, o MOSFET é utilizado como detector de radiação ionizante desde o século passado [4][5][6] como dosímetro em radioterapia. As aplicações em feixes de raios X aplicados em radiodiagnóstico também já foram publicadas [7,8]. Recentemente, foi registrada uma inovação tecnológica com base em um circuito diferencial com pares MOSFETs eletronicamente casados (em inglês: matched MOSFETs) [9].…”

Section: Introductionunclassified

Efeito do encapsulamento em um VDMOSFET sob feixes de raios X usados em diagnóstico médico

Cavalcanti¹,

Santos

2022

Sci. Plena

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O dispositivo eletrônico MOSFET (Metal Oxide Semiconductor Field Effect Transistor) é conhecido como um detector de radiação ionizante, principalmente em feixes de radioterapia. Recentemente um tipo de MOSFET já foi utilizado também em feixes de radiodiagnóstico médico, cuja faixa de energia é significativamente inferior à faixa de energia normalmente utilizada em radioterapia. Este trabalho traz um estudo científico da utilização de um VDMOSFET (VD = Vertical Double Diffused) e sua resposta aos feixes de raios X normalmente usados em diagnóstico médico. O VDMOSFET escolhido para a análise é fabricado em pelo menos dois tipos de encapsulamento diferentes e foi isso que permitiu desenvolver este trabalho. Os resultados mostraram que, embora a pastilha de silício seja exatamente a mesma, ou seja, o dispositivo eletrônico em si ter características elétricas idênticas, a resposta de cada um com seus respectivos encapsulamentos é diferente. O efeito do encapsulamento sugere que o VDMOSFET possa ser utilizado em processos de mensuração de parâmetros de tubo de raios X aplicado ao diagnóstico médico resultando em avanços tecnológicos na área das radiações ionizantes aplicadas em medicina.

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Preparation and Application of Nanostructured ZnO in Radiation Detection

Chen,

Yang,

Ning

et al. 2024

Materials

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In order to adapt to the rapid development of high-speed imaging technology in recent years, it is very important to develop scintillators with an ultrafast time response. Because of its radiation-induced ultrafast decay time, ZnO has become an important material for radiation detection and dosimetry. According to different detection sources and application scenarios, ZnO is used in various radiation detectors in different structures, including nanoarrays and nanocomposites. In this paper, the synthesis methods and research status of various nanostructured ZnO-based materials and their applications in the detection of high-energy rays (X-rays, γ-rays) and high-energy particles (α, β and neutron) are reviewed. The performance discussion mainly includes spatial resolution, decay time and detection efficiency.

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The comparison of a thin-film ZnO nanodevice with silicon-based electronic devices for diagnostic X-ray beam detection

Cited by 3 publications

References 18 publications

An innovative detector for X-ray beams made of polyethylene terephthalate built in a 3D printer

An innovative detector for X-ray beams made of polyethylene terephthalate built in a 3D printer

Efeito do encapsulamento em um VDMOSFET sob feixes de raios X usados em diagnóstico médico

Preparation and Application of Nanostructured ZnO in Radiation Detection

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