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Original Article

Korean Journal of Medical Physics 2016; 27(2): 72-78

Published online June 30, 2016

Copyright © Korean Society of Medical Physics.

Characteristics of CCD Based Optical CT Scanner for Therapeutic Radiation Dosimetry

Jae Choon Lee*, Ae Ran Kim*, Young Hoon Ji, Soo-Il Kwon

*Department of Medical Physics, Kyonggi University, Suwon, Korea Institute of Radiological and Medical Sciences, Seoul, Department of ElectroPhysics, College of Natural Science, Kyonggi University, Suwon, Korea

Received: May 30, 2016; Revised: June 3, 2016; Accepted: June 4, 2016

Abstract

A CCD camera and an LED light source were combined to fabricate a compact optical CT scanner for the therapeutic radiation dose evaluation of a polymer gel dosimeter. After the collimated beam emitted by the LED passed through aquarium, gel phantom, and telecentric lens, an image was collected by the CCD camera and reconstructed using MATLAB. By using a stepping motor and LabVIEW, the gel dosimeter was rotated at every 0.72o, and the time for collecting 500 slice images per a revolution was within 20 min. At a spatial frequency of 4.5 lp/mm of the optical CT scanner, the modulation transfer function value was 72%. The linear correlation coefficient of the optical CT scanner for the polymer gel dosimeter was 0.987.

KeywordsOptical Computed Tomography Scanner, Polymer Gel, Dosimetry

Korean Society of Medical Physics

Vol.35 No.2
June 2024

pISSN 2508-4445
eISSN 2508-4453
Formerly ISSN 1226-5829

Frequency: Quarterly

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