Development of a 3D optical scanner for evaluating patient-specific dose distributions

Autor: Hong Jung, Kwang Hwan Cho, Kwang Hyeon Kim, Chul Kee Min, Jang Bo Shim, Young Je Park, Yeon Wook Choo, Sang Hoon Lee, Woo Chul Kim, Nam Kwon Lee, Suk Joong Lee, Chul Yong Kim, Hyun Do Huh, Sangwook Lim, Kyung Hwan Chang, Sam Ju Cho, Yuan Jie Cao
Rok vydání: 2015
Předmět:
Zdroj: Physica Medica. 31:553-559
ISSN: 1120-1797
DOI: 10.1016/j.ejmp.2015.05.009
Popis: Purpose This paper describes the hardware and software characteristics of a 3D optical scanner (P3DS) developed in-house. The P3DS consists of an LED light source, diffuse screen, step motor, CCD camera, and scanner management software with 3D reconstructed software. Materials and method We performed optical simulation, 2D and 3D reconstruction image testing, and pre-clinical testing for the P3DS. We developed the optical scanner with three key characteristics in mind. First, we developed a continuous scanning method to expand possible clinical applications. Second, we manufactured a collimator to improve image quality by reducing scattering from the light source. Third, we developed an optical scanner with changeable camera positioning to enable acquisition of optimal images according to the size of the gel dosimeter. Results We confirmed ray-tracing in P3DS with optic simulation and found that 2D projection and 3D reconstructed images were qualitatively similar to the phantom images. For pre-clinical tests, the dose distribution and profile showed good agreement among RTP, optical CT, and external beam radiotherapy film data for the axial and coronal views. The P3DS has shown that it can scan and reconstruct for evaluation of the gel dosimeter within 1 min. We confirmed that the P3DS system is a useful tool for the measurement of 3D dose distributions for 3D radiation therapy QA. Further experiments are needed to investigate quantitative analysis for 3D dose distribution.
Databáze: OpenAIRE
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