Authors : Kwanghyun Chang, Joonkoo Choi, Ghajung Kim, Joongseok Go, Seunggi Kim and Sinyoung Yu
Abstract: The purpose of phantom image test is to evaluate the image quality. Therefore, it is investigated that whether several phantoms are available for QC by comparison and measurement of phantoms. In this study, 4 CT scanners were used, light speed VCT (GE healthcare, USA), Brilliance ICT, Brilliance 64 (Philips medical system, Netherlands), Somatom Definition Flash, Somatom Definition AS (Siemens healthcare, Germany), Aquilion 64 (Toshiba medical system, Japan) and 3 phantoms were used, AAPM CT performance phantom (Model 76-140, ACR phantom (Model #438, gammexrmi, USA) and catphan phantom (600, USA). Phantom images were obtained from each CT scanners by axial scan. There was no significant difference in measurement results for 3 phantoms about common evaluation items (slice thickness, uniformity, high contrast resolution, low contrast resolution, CT number evaluation). The intent of study is to allow users to use other phantoms, not AAPM phantom selected as a standard phantom by “The rules on the installation and operation of special medical equipment”. It is considered to do quality control with proper phantom depend on necessary quality control items because exceptional phantoms have own characteristic quality control items.
Kwanghyun Chang, Joonkoo Choi, Ghajung Kim, Joongseok Go, Seunggi Kim and Sinyoung Yu, 2018. Evaluation of the Image Quality on Computed Tomography. Journal of Engineering and Applied Sciences, 13: 3724-3729.