The Usability Assessment of the Self-Produced Table for the Quality Control of Mobile CT

• 영문명: The Usability Assessment of the Self-Produced Table for the Quality Control of Mobile CT
• 발행기관: 대한CT영상기술학회
• 저자명: Dong Jun Jang Seong Min Choi Dan Bi Lee
• 간행물 정보: 『대한CT영상기술학회지』대한CT영상기술학회지 제24권 제1호, 1~8쪽, 전체 8쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2022.03.31

영문 초록

Since there are no tables customized for mobile CT examinations, it is difficult to place the AAPM phantom to the isocenter during the quality control. This produced a phantom table for the quality control of Mobile CT, assessing its utility through conducting a quantitative evaluation through CNR value comparison between with and without the use of the table on low contrast resolution images among 20 phantom images evaluation, along with a qualitative assessment conducted on the scale of 1 to 5 by 5 quality control operators. The obtained average CNR values from low contrast resolution images in the order of the table being used and not used are -0.01069 ± 0.00149 vs -0.01485 ± 0.00208, -0.01277 ± 0.00131 vs -0.01526 ± 0.00215, -0.01419 ± 0.00144 vs -0.01671 ± 0.00277, -0.01651 ± 0.00140 vs -0.01836 ± 0.00199, -0.01542 ± 0.0188 vs -0.01836 ± 0.00199 from A-row, -0.01132 ± 0.00134 vs -0.01300 ± 0.00222, -0.1202 ± 0.00129 vs -0.01369 ± 0.00145, -0.001391 ± 0.00163 vs -0.01460 ± 0.00139, -0.01607 ± 0.00185 vs -0.01683 ± 0.00182, -0.01502 ± 0.00170 vs -0.01656 ± 0.00125 from B-row, indicating higher absolute values of CNR when the table is being used than not being used, which corresponds to more suitable images. Furthermore, the average score of all items in qualitative assessment has increased from 3.64 to 4.24, suggesting statistically significant margin of increase especially on the items of efficiency and the quality of images. In conclusion, placing the phantom on a more accurate isocenter through the exploitation of the table produced through this research provides phantom images with higher quality along with the decrease of unnecessary efforts from the operators.

목차

I. INTRODUCTION

II. MATERIAL AND METHODS

III. RESULT

IV. DISCUSSION

V. CONCLUSIONS

REFERENCES

키워드

mobile CT quality control quantiative assessment low contrast