Development of Total Lymphoid Irradiation (TLI)-Dedicated Shielding and Image-Guided System and Dose Evaluation Using 3D-Printed Rat Phantom

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Authors: Dong Hyeok Choi ; So Hyun Ahn ; Kwangwoo Park ; Sang Hyun Choi ; Jin Sung Kim

Keywords: 3D-printed phantom ; image-guided radiotherapy ; in vivo dosimetry ; position-controlled shielding system ; rat ; total lymphoid irradiation

Abstract: Purpose: The purpose of this study is to propose a technique for delivering accurate doses in an image-guided system by developing an experimental setup optimized for total lymphoid irradiation (TLI) in rat lung transplantation.

Materials and methods: In this study, a position-controlled shielding system was developed, and the dose was quantitatively evaluated using a 3D rat phantom and Gafchromic EBT3 film. In addition, we made our own image-guided system that allows the position of the rat and the shielding system to be confirmed during TLI.

Results: As a result of using the position-controlled shielding system, it was found that the doses to the head and lungs were reduced by 93.1 and 87.4%, respectively, of the prescribed doses. In addition, it was shown that the position of the shielding system can be easily confirmed by using the image guidance system.

Conclusion: A shielding apparatus that can control dose delivery according to the size of the rat can optimize the dose for TLI in rat lung transplantation.