지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
To improve B1 homogeneity in high field MRI, the RF power is applied to the transmit array coil elements sequentially in the time-multiplexed way. Since only a single coil element is activated in a time-multiplexing slot, the global standing wave formation in the human body is greatly suppressed. The time-multiplexing slot width is on the order of micro seconds, hence, high-order-harmonic slices can be placed far from the transmit coil and simultaneous multiple slice selection can be avoided. The B1 homogeneities of a birdcage coil and an eight-channel transmit array coil have been compared through finite difference time domain simulations. The simulation results indicate that the proposed technique can reduce the peak-to-peak B1 inhomogeneity down to one fourth of the transmission with a birdcage coil on the central plane of the human head model at 3 T. The mimicking experiments at 3 T, eight separate experiments with a single coil element activated and image reconstruction by combining the eight images, also show promising results. It is expected that the proposed technique has some advantages over other B1 improving methods in real practice since simple RF switching circuitries are only necessary and electromagnetic coupling between the coil elements is out of concern in its realization.
목차
등록된 정보가 없습니다.
참고문헌 (25)
참고문헌 신청
A.C. Zelinski / 2007 / Designing RF pulses with optimal specific absorption rate (SAR) characteristics and exploring excitation fidelity, SAR and duration tradeoffs / in Proc. 15t
C.M. Collins / 2005 / Combination of optimized transmit arrays and some receive array reconstr- uction methods can yield homogeneous imagesat very high frequencies / Magn. R
C.M. Collins / 2005 / Strengths and limitations of pulsing coils in an array sequentially to avoid RF interference in high field MRI / in Proc.13th Annual Meeting of ISMRM, Miami
C.M. Collins / 2006 / Multi-coil composite pulses for whole-brain homogeneity improved over RF shimming alone / in Proc.14th Annual Meeting of ISMRM, Seattle, USA : 702 ~
C.M. Collins / 2007 / Array-optimized composite pulse for excellent whole-brain homogeneity in high-field MRI / Magn. Reson. Med 57 : 470 ~ 474
C.M. Collins / 2005 / Combination of optimized transmit arrays and some receive array reconstr- uction methods can yield homogeneous imagesat very high frequencies / Magn. R
C.M. Collins / 2005 / Strengths and limitations of pulsing coils in an array sequentially to avoid RF interference in high field MRI / in Proc.13th Annual Meeting of ISMRM, Miami
C.M. Collins / 2006 / Multi-coil composite pulses for whole-brain homogeneity improved over RF shimming alone / in Proc.14th Annual Meeting of ISMRM, Seattle, USA : 702 ~
C.M. Collins / 2007 / Array-optimized composite pulse for excellent whole-brain homogeneity in high-field MRI / Magn. Reson. Med 57 : 470 ~ 474
함께 읽어보면 좋을 논문
논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!
-
RF Shimming Considering Coupling Effects for High-Field MRI
의공학회지
2008 .01
-
고자장 3T MRI 장비에서 동물영상을 위한 솔레노이드 RF 코일 개발
Investigative Magnetic Resonance Imaging
2007 .01
-
Comparison of Pelvic Phased-Array versus Endorectal Coil Magnetic Resonance Imaging at 3 Tesla for Local Staging of Prostate Cancer
Yonsei Medical Journal
2012 .01
-
A Tool Box to Evaluate the Phased Array Coil Performance Using Retrospective 3D Coil Modeling
Investigative Magnetic Resonance Imaging
2014 .01
-
직장암의 자기공명영상 분석 : 복합코일 대 골반위상배열코일
대한방사선의학회지
1998 .01
-
Improvement of a 4-Channel Spiral-Loop RF Coil Array for TMJ MR Imaging at 7T
Investigative Magnetic Resonance Imaging
2012 .01
-
Thromboembolic Events Associated with Electrolytic Detachment of Guglielmi Detachable Coils and Target Coils : Comparison with Use of Diffusion-Weighted MR Imaging
대한신경외과학회지
2013 .01
-
COIL (Collaborative Online International Learning) 프로그램
의학교육논단
2020 .01
-
전립선암의 국소적 병기 결정에 있어서 경직장 코일을 이용한 자기공명영상의 유용성
대한방사선의학회지
1994 .01
-
Development of 1H-31P Animal RF Coil for pH Measurement Using a Clinical MR Scanner
Investigative Magnetic Resonance Imaging
2014 .01
-
PET/CT 검사에 있어서 MR Torso Coil의 CT 감쇄보정에 대한 영향 평가
핵의학기술
2012 .01
-
선형적 위상배열 코일구조의 시뮬레이션을 통한 민감도지도의 공간 해상도 및 필터링 변화에 따른 MR-SENSE 영상재구성 평가
의공학회지
2011 .01
-
Endovascular Rescue Method for Undesirably Stretched Coil
대한신경외과학회지
2014 .01
-
Radiofrequency Coil Design for in vivo Sodium Magnetic Resonance Imaging of Mouse Kidney at 9.4T
Investigative Magnetic Resonance Imaging
2018 .01
-
팬텀을 이용한 다기능 위$\cdot$십이지전관 코일 카테타의 유용성 평가
대한방사선협회지
2003 .01
-
Early Rupture after Coiling of Unruptured Aneurysm
대한신경외과학회지
2007 .01
-
Colon perforation due to embolization coil for internal iliac aneurysm
Annals of Surgical Treatment and Research
2017 .06
-
Coil 색전술을 이용한 PDA 교정
WITH CAP(COMPANION ANIMAL PRACTICE)
2006 .12
이 논문의 저자 정보
최근 본 자료
댓글(0)
0