Measurement of a PAGAT gel dosimeter by ultrasound computed tomography

7th International Conference on 3D Radiation Dosimetry

Khoei, S.^1 ; Trapp, J.V.^1 ; Langton, C.M.^1

School of Chemistry, Physics, and Mechanical Engineering, Institute of Health and Biomedical Innovation, Queensland University of Technology (QUT), Brisbane, QLD, Australia^1

关键词: Dose sensitivity;    Phased array ultrasound;    Polymer gel dosimeter;    Quantitative CT;    Ultrasonic parameters;    Ultrasound computed tomography;    Ultrasound imaging systems;    Ultrasound signal;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/444/1/012083/pdf
DOI  :  10.1088/1742-6596/444/1/012083

来源: IOP

【 摘 要 】

In this work we used a 3D quantitative CT ultrasound imaging system to characterise polymer gel dosimeters. The system comprised of two identical 5 MHz 128 element phased-array ultrasound transducers co-axially aligned and submerged in water as a coupling agent. Rotational and translational movement of the gel dosimeter sample between the transducers were performed using a robotic arm. Ultrasound signals were generated and received using an Olympus Omniscan unit. Dose sensitivity of attenuation and time of flight ultrasonic parameters were assessed using this system.