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

Kyung Hwan Chang, Suk Lee, Hong Jung, Yeon Wook Choo, Yuan Jie Cao, Jang Bo Shim, Kwang Hyeon Kim, Nam Kwon Lee, Young Je Park, Chul Yong Kim, Sam Ju Cho, Sang Hoon Lee, Chul Kee Min, Woo Chul Kim, Kwang Hwan Cho, Hyun Do Huh, Sangwook Lim

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


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 1min. 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.

Original languageEnglish
Pages (from-to)553-559
Number of pages7
JournalPhysica Medica
Issue number5
Publication statusPublished - 2015 Jul 1

Bibliographical note

Funding Information:
This work was supported by a Korea University Grant.

Publisher Copyright:
© 2015 Associazione Italiana di Fisica Medica.


  • 3D QA
  • 3D dose analysis
  • 3D optical scanner (P3DS)
  • Optical scanner
  • Radiation therapy

ASJC Scopus subject areas

  • Biophysics
  • Radiology Nuclear Medicine and imaging
  • General Physics and Astronomy


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