Abstract

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Title:: Design of a 3D printing-based individualized thorax phantom for dose verification

Author(s):: YANG Yuanjia1; TONG Lei2; ZHONG Anni3; CHEN Chaomin3; 1. Department of Medical Instrument, Peoples Hospital of Guangning County, Zhaoqing 526300, China 2. Guangdong Mechanical & Electronical Polytechnic, Guangzhou 510515, China 3. School of Biomedical Engineering, Southern Medical University, Guangzhou 510515, China

Keywords:: Keywords: 3D printing design of individualized phantom for dose verification equivalent material dose verification

Abstract:: Abstract: Objective To design an individual phantom that can reflect the real situation of patients by 3D printing technology for realizing more accurate treatment plan verification. Methods Based on the reconstruction according to the CT image obtained during positioning, the shell of the three-dimensional structure of the patient was obtained by 3D printing. Then the shell was filled with radiation tissue-equivalent materials selected according to CT value of each organ, thereby obtaining the individualized phantom which reflected patients characteristics and then was used for dose verification. Results The synthetic equivalent materials were scanned with CT. The obtained CT values of bone tissues, lung tissues, soft tissues and tumor were 1 100, -747.6, -22 and -471 HU, respectively, with errors less than 22%. Conclusion The designed thorax phantom can accurately reflect the differences between individuals, and the tissue-equivalent materials have excellent radiation properties. The designed thorax phantom can be used in the actual dose verification.