X-ray spectrometry applied for determination of linear attenuation coefficient of tissue-equivalent materials

Author(s)

Frimaio, Audrew ^[1] ; Nascimento, Bruna C. ^[2] ; Barrio, Ramon M. M. ^[2] ; Campos, Leticia L. ^[1] ; Costa, Paulo R. ^[2]

Affiliation

^[1] IPEN, Av Prof Lineu Prestes 2242, BR-05508000 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Fis, Sao Paulo - Brazil

• Document type: Journal article
• Source: Radiation Physics and Chemistry; v. 160, p. 89-95, JUL 2019.
• Web of Science Citations: 3

Abstract

Resin-based materials equivalent to water were developed and four different samples were obtained. The linear attenuation coefficients of all samples was evaluated using X-ray spectrometry with primary and transmitted beams using voltages at the ranging from 60 to 120 kV. The experimental measured values were compared with theoretical reference values to water and with that obtained using the Least Square Method algorithm methodology (method applied to diagnostic radiology and radiotherapy). Our results show that differences between the measured values and the target mu(E) was lower than 7% +/- 0.3 in the energy range from 20 to 80 keV. These results enable to consider that the material developed and produced is a good option to be used as a water equivalent material and the experimental method adequate to its quantitative evaluation. (AU)

• FAPESP's process: 17/23034-9 - Validation of radiologically tissue-equivalent materials
• Grantee: Bruna Costa Nascimento
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 10/12237-7 - Experimento evaluation of the relation between air-Kerma and ambient equivalent dose for shielding calculation in adult and pediatric X-ray rooms
• Grantee: Paulo Roberto Costa
• Support Opportunities: Regular Research Grants