자체 제작한 자기공명영상 고주파 차폐체의 유용성 평가
Evaluation of the Utility of Self Produced MRI Radiofrequency Shielding Material
0
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
자기공명영상 고주파를 차단할 수 있는 금속물질 중 자장에 영향을 받지 않으며 가격이 저렴하고 주위에서 쉽게 구할 수 있는 알루미늄 호일을 이용하여 차폐체를 제작하였다. Phantom 실험 결과 over-sampling 기법을 적용한 경우 적용 전보다 aliasing artifact가 약 94% 감소하였고, 알루미늄 차폐체를 적용한 경우도 적용 전 보다 약 92% 감소하였다. 그리고 scan time도 over-sampling 기법의 경우 적용 전보다 약 3배이상 증가한 반면, 알루미늄 차폐체의 경우는 적용 전과 변화가 없는 것으로 나타났다. 따라서 알루미늄 호일을 이용한 차폐체도 기존의 흡수재 및 차폐체들과 마찬가지로 scan time의 증가 없이 aliasing artifact를 효율적으로 제거할 수 있는 것을 확인하였다.
Abstract
This paper proposes a better shielding method to over sampling technique. The new method uses aluminum foil for RF shielding. As a result of the phantom test, when the over-sampling technique was applied, the aliasing artifact was reduced by about 94% compared to before the application, and the case where the aluminum shielding band was applied was also reduced by about 92% compared to before application. In addition, the scan time also increased by more than 3 times in the case of the over-sampling technique, while it was found that there was no change from before the application of the aluminum shielding band Therefore, it was confirmed that the shielding band using aluminum foil can effectively remove aliasing artifacts without increasing the scan time.
참고문헌 (17)
- Korean Society of Magnetic Resonance Imaging, "Textbook of Magnetic Resonance Imaging" (2019), Chung Ku Publisher
- Jonathan C. Sharp, "High-resolution MRI encoding using radiofrequency phase gradients", NMR in Biomedicine, 26(11), pp.1602~1607 (2013), Wiley[DOI]
- 김재형, "고자장 자기공명영상 개론", 대한의사협회지, 53(12), pp.1055~1058 (2010), 대한의사협회
- 구은회, "복부 자기공명영상에서 영상의 질 평가: 1.5 T 와 3.0 T 비교", 한국방사선학회논문지, 10(5), pp.367~373 (2016), 한국방사선학회[DOI]
- M. A. Bernstein, "Handbook of MRI Pulse Sequences" (2004), Elsevier Academic Press
- Lawrence M. White, "Technical Considerations: CT and MR Imaging in the Postoperative Orthopedic Patient", Seminars in Musculoskeletal Radiology, 06(1), pp.005~018 (2002), Georg Thieme Verlag KG[DOI]
- G. Iannucci, "Correlations between clinical and MRI involvement in multiple sclerosis : assessment using T1, T2 and MT histograms", Journal of the Korea Convergence Society, 1(1), pp.83~91 (1999)[DOI]
- Monika Bekiesińska-Figatowska, "Artifacts in Magnetic Resonance Imaging", Polish Journal of Radiology, 80, pp.93~106 (2015), Termedia Sp. z.o.o.[DOI]
- 고성진, "자기공명영상에서 자장세기와 시퀀스에 따른 아티팩트 변화", 한국콘텐츠학회 논문지, 10(9), pp.302~308 (2010), 한국콘텐츠학회
- Houchun H. Hu, "Variable field of view for spatial resolution improvement in continuously moving table magnetic resonance imaging", Magnetic Resonance in Medicine, 54(1), pp.146~151 (2005), Wiley[DOI]
- 최우전, "반자성 물질을 이용한 자기공명영상검사에서의 인공물 감소", 한국방사선학회논문지, 13(4), pp.581~588 (2019), 한국방사선학회[DOI]
- Lin Chen, "An aliasing artifacts reducing approach with random undersampling for spatiotemporally encoded single-shot MRI", Journal of Magnetic Resonance, 237, pp.115~124 (2013), Elsevier BV[DOI]
- 이상복, "분자 MR영상에서 UTE 신호의 효용성 평가", 한국방사선학회논문지, 6(4), pp.305~311 (2012), 한국방사선학회[DOI]
- Lucia Kang, "An Effectiveness of Radio Frequcncy(RF) Shielding Fibers and Customized RF Protective Clothing Applied to the Whole Body in Partial Area Imaging Working as a RF Absorber", Journal of the Korean Society of MR Technology, 27(2), pp.45~57 (2017), Korean Society of MR Technology[DOI]
- Brian A. Hargreaves, "Metal-Induced Artifacts in MRI", American Journal of Roentgenology, 197(3), pp.547~555 (2011), American Roentgen Ray Society[DOI]
- Wenmiao Lu, "SEMAC: Slice encoding for metal artifact correction in MRI", Magnetic Resonance in Medicine, 62(1), pp.66~76 (2009), Wiley[DOI]
- 김혜숙, "보건기관 이용 현황 및 만족도와 관련 요인 -‘2010지역사회건강조사’ 자료를 이용하여-", 보건의료산업학회지, 7(3), pp.95~109 (2013), 보건의료산업학회