PET/CT 검사에서 움직임에 의한 인공물의 산란제한보정법 적용 영상 평가

• 영문명: Correction of Artifacts due to Patient Arm Motion in PET/CT: Scatter-Limit Correction
• 발행기관: 대한핵의학기술학회
• 저자명: 반영각(Young Kag Bahn) 이승재(Seung Jae Lee) 김정열(Jung Yul Kim) 오신현(Sin Hyun Oh) 남궁혁(Hyuk Nam-Koong) 박훈희(Hoon-Hee Park) 강천구(Chun Koo Kang) 임한상(Han Sang Lim) 이창호(Chang Ho Lee)
• 간행물 정보: 『핵의학기술』Vol.16 No.2, 44~48쪽, 전체 5쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2012.10.30

영문 초록

Purpose : Arm motion can give rise to striking cold artifact on PET/CT. We investigated that evaluation of scatter-limit correction and correct the patient arm motion artifact in Discovery 600 PET/CT. Materials and Methods : To evaluate a radioactivity uptake (Bq/ml) and a standard uptake value (SUV), the scatter limit correction and scatter correction were compared using 1994 NEMA Phantom ™ in Discovery 600 PET / CT (GE Healthcare, Mi, We). Arm motion phantom study was involved a central 20 cm diameter cylinder simulating the neck and 2 peripheral 10 cm diameter cylinders simulating arms. The positions of the arms were altered so as to introduce different amounts of misalignment. The evaluation of arm motion phantom study used the radioactivity uptake and SUV in scatter correction and scatter limit correction. Results : The statistical significance of radioactivity uptake and SUV did not show the differences in comparisons of the scatter limit correction and the scatter correction that not show (p<0.05). Radioactivity uptake of the scatter correction was up to 3.1 kBq/ml in the 0.04 kBq/ml. It was approximately 98.7% undervalued in the arm motion phantom study. However, Radioactivity uptake of the scatter limit correction was up to 3.0 kBq/ml in the 2.11 kBq/ml. It was approximately 30% undervalued in arm motion phantom study. SUV of the scatter correction was 1.05 to 0.006 and underestimated about 98%. However, an applying SUV of the scatter limit correction changed the value as 0.67 which is underestimated about 25%. Radioactivity uptake and SUV of the scatter limit correction was increased approximately 60%, or more than the scatter correction. Conclusion : It is considered that if the patient arm motion artifact was occurred the scatter limit correction will be applicable to give an accurate diagnosis.

목차

서론

실험재료 및 방법

결과

고찰

결론

요약

REFERENCES

키워드

PET/CT Scatter limit correction method Arm motion artifact