Spectral reconstruction of dental X-ray tubes using laplace inverse transform of the attenuation curve
| العنوان: | Spectral reconstruction of dental X-ray tubes using laplace inverse transform of the attenuation curve |
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| المؤلفون: | Tomal, Alessandra, 1983 |
| المساهمون: | International Topical Meeting on Industrial Radiation and Radioisotope Measurement Applications (9. : 6 a 11 de Julho de 2014 : Valencia, Espanha), UNIVERSIDADE ESTADUAL DE CAMPINAS |
| المصدر: | Repositório da Produção Científica e Intelectual da Unicamp Universidade Estadual de Campinas (UNICAMP) instacron:UNICAMP |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Transformada de Laplace, Laplace transformation, Attenuation curves, Dentes - Radiologia, X-ray spectroscopy, Spectra measurements, Espectroscopia de raio X, Teeth - Radiology, Artigo de evento |
| الوصف: | Agradecimentos: This work was supported by the Brazilian agencies Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (142284/2013-0), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES), Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP). The authors would like to thank to Damaris Stopato Fonseca and Eldereis de Paula for technical support Abstract: In this work, a spectral reconstruction methodology for diagnostic X-ray, using Laplace inverse transform of the attenuation, was successfully applied to dental X-ray equipments. The attenuation curves of 8 commercially available dental X-ray equipment, from 3 different manufactures (Siemens, Gnatus and Dabi Atlante), were obtained by using an ionization chamber and high purity aluminium filters, while the kVp was obtained with a specific meter. A computational routine was implemented in order to adjust a model function, whose inverse Laplace transform is analytically known, to the attenuation curve. This methodology was validated by comparing the reconstructed and the measured (using semiconductor detector of cadmium telluride) spectra of a given dental X-ray unit. The spectral reconstruction showed the Dabi Atlante equipments generating similar shape spectra. This is a desirable feature from clinic standpoint because it produces similar levels of image quality and dose. We observed that equipments from Siemens and Gnatus generate significantly different spectra, suggesting that, for a given operating protocol, these units will present different levels of image quality and dose. This fact claims for the necessity of individualized operating protocols that maximize image quality and dose. The proposed methodology is suitable to perform a spectral reconstruction of dental X-ray equipments from the simple measurements of attenuation curve and kVp. The simplified experimental apparatus and the low level of technical difficulty make this methodology accessible to a broad range of users. The knowledge of the spectral distribution can help in the development of operating protocols that maximize image quality and dose CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP Fechado |
| وصف الملف: | application/pdf |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=od______3056::d3ba2bf69b7cb05f375f4a4cde68d6df |
| Rights: | OPEN |
| رقم الانضمام: | edsair.od......3056..d3ba2bf69b7cb05f375f4a4cde68d6df |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |