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
In this research we evaluate the excitation homogeneity and SAR of three different Tx arrays after B1+ Shimming in the human body at 3T. Through the simulations, we compared the field properties that are standard deviation and mean value of transverse magnetization for 1) strip line TEM array, 2) rectangular loop array, 3) combined array of strip line element and rectangular loop and shown the utilities of B1+ shimming in human body model. After B1+ shimming, it is evaluated four different types of SAR for body mesh through whole body simulation; those are average, maximum 1-cell, maximum 1-gram, and maximum 10-gram SAR. It appears that in this particular comparison an array based on strip line elements can produce better homogeneity and lower SAR than an array of rectangular loops or an array of combined elements (strip line and loop). While many factors are considered in designing coils for production, it is hoped that methods and results like these will be used in the future to guide decisions and maximize benefit.
목차
Abstract
1. 서론
2. 방법 및 실험
3. 결과
4. 결론
References
참고문헌 (11)
참고문헌 신청
1. [학술지(정기간행물)] - PA Bottomley / 1978 / RF magnetic field penetration, phase shift and power dissipation in biological tissue:implications for NMR imaging / Phys Med Biol 23 : 630 ~ 643
2. [학술지(정기간행물)] - JT. Vaughan / 2001 / 7T vs. 4T: RF power, homogeneity, and signal-to-noise comparison in head images / Magn Reson Med 46 (1) : 24 ~ 30
3. [학술지(정기간행물)] - Chang KJ / 2010 / Abdominal imaging at 3T:Challenges and solutions / Applied Radiology 39 (10)
4. [학술지(정기간행물)] - TS Ibrahim / 2001 / Effect of RF coil excitation on field inhomogeneity at ultra high fields: a field optimized TEM resonator / Magn Reson Imaging 19 : 1339 ~ 1347
5. [학술지(정기간행물)] - CM Collins / 2005 / Combination of optimized transmit arrays and some receive array reconstruction methods can yield homogeneous images at very high frequencies / Magn Reson Med 54 (6) : 1321 ~ 1580
2. [학술지(정기간행물)] - JT. Vaughan / 2001 / 7T vs. 4T: RF power, homogeneity, and signal-to-noise comparison in head images / Magn Reson Med 46 (1) : 24 ~ 30
3. [학술지(정기간행물)] - Chang KJ / 2010 / Abdominal imaging at 3T:Challenges and solutions / Applied Radiology 39 (10)
4. [학술지(정기간행물)] - TS Ibrahim / 2001 / Effect of RF coil excitation on field inhomogeneity at ultra high fields: a field optimized TEM resonator / Magn Reson Imaging 19 : 1339 ~ 1347
5. [학술지(정기간행물)] - CM Collins / 2005 / Combination of optimized transmit arrays and some receive array reconstruction methods can yield homogeneous images at very high frequencies / Magn Reson Med 54 (6) : 1321 ~ 1580
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UCI(KEPA) : I410-ECN-0101-2015-500-001278484