Metrology applied to ultrasound characterization of trabecular bones using the AIB parameter

8th Brazilian Congress on Metrology

Braz, D.S.^1 ; Silva, C.E.^1 ; Alvarenga, A.V.^1 ; Junior, D.S.^1 ; Costa-Félix, R.P.B.^1

Laboratory of Ultrasound (Labus), Scientific and Industrial Metrology (Dimci), National Institute of Metrology, Quality and Technology (Inmetro), Brazil^1

关键词: Apparent backscatter;    Backscatter signals;    Guide to the expression of uncertainty in measurements;    Integrated backscattering;    Measurement uncertainty;    Mechanical scanning systems;    Ultrasound characterization;    Uncertainty modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/733/1/012012/pdf
DOI  :  10.1088/1742-6596/733/1/012012

来源: IOP

【 摘 要 】

Apparent Integrated Backscattering (AIB) presents correlation between Apparent Backscatter Transfer Function and the transducer bandwidth. Replicas of trabecular bones (cubes of 20 mm side length) created by 3D printing technique were characterized using AIB with a 2.25 MHz center frequency transducer. A mechanical scanning system was used to acquire multiple backscatter signals. An uncertainty model in measurement was proposed based on the Guide to the Expression of Uncertainty in Measurement. Initial AIB results are not metrologically reliable, presenting high measurement uncertainties (sample: 5-0.2032/AIB: -15.1 dB ± 13.9 dB). It is noteworthy that the uncertainty model proposed contributes as unprecedented way for metrological assessment of trabecular bone characterization using AIB.