PET-CT 검사 시 호흡동조 시스템을 이용한 인공물 감소에 대한 비교 평가

• 영문명: The Research of Comparison Evaluation on the Decline in Artifact Using Respiratory Gating System in PET-CT
• 발행기관: 대한핵의학기술학회
• 저자명: 김진영(Jin-Young Kim) 이승재(Seung Jae Lee) 정석(Suk jung) 박민수(Min-Soo Park) 강천구(Chun-Goo Kang) 임한상(Han-Sang Im) 김재삼(Jae-Sam Kim)
• 간행물 정보: 『핵의학기술』Vol.19 No.2, 63~67쪽, 전체 5쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2015.10.30

영문 초록

Purpose Among various causes that influence image quality degradation, various methods for decrease in Artifact occurred by respiration of patients are being used. Among them, this study intended to evaluate CTAC Shift correction method and additional scan compare to the Scan(Q static scan) using respiratory gated system. Materials and Methods This study was conducted on 10 patients, and used PET-CT Discovery 710 (GE Healthcare, MI, USA) and Varian’s RPM system. 5.18 Mbq per kg of ¹⁸F-FDG was injected on patients, asked them to take a rest for 1 hour in the bed, and conducted test after urination. Images were visualized through Q static scan, CTAC Shift correction method, Additional scan based on the Whole body scan(WBS) with Artifact. Decrease in Artifact was compared in each image, conducted Gross Evalution, and measured changes of SUVmax. Results For image obtained through the CTAC Shift correction method through WBS with Artifact, 12~56%, Q static scan image showed 17~54% of change rate and Additional Scan showed –27~46% of change rate. In Blind Test, the CTAC Shift correction image showed the highest point with 4 points, Q static scan image showed 3.5 points, and Additional scan image showed 3.4 points. The standardized WBS scan through Oneway ANOVA and three types of Scan method showed significant difference(p<0.05), and did not show significant difference between the three Scan methods(p>0.05). However, the three Scan methods showed significant difference in Blind test. Conclusion Additional scan and Q static scan require more time than the CTAC Shift correction method, there is concern about excessive exposure to patients by CT rescan and Q static scan is difficult to apply on patients with inconsistent respiration or irregular respiration cycle due to pain. For CTAC Shift correction method, limited correction is possible and the range is limited as well. It is considered as a useful method of improving diagnostic value when hospitals use the system appropriately and develop various advantageous factors of each method.

목차

서론

실험재료 및 방법

결과

결론 및 고찰

요약

참고문헌

키워드

RPM Artifact Respiratory SUVmax