用于减少3T场强下B1不均匀性的小翻转角三维定制射频层面选择脉冲
Small tip angle three-dimensional tailored radiofrequency slab-select pulse for reduced B1 inhomogeneity at 3 T.
作者信息
Saekho Suwit, Boada Fernando E, Noll Douglas C, Stenger V Andrew
机构信息
Department of Bioengineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, USA.
出版信息
Magn Reson Med. 2005 Feb;53(2):479-84. doi: 10.1002/mrm.20358.
Abstract
This work presents a small tip-angle 3D tailored RF slab-select pulse for reducing the B1 field inhomogeneity at 3T. The compensated slice profile was determined from a B1 inhomogeneity map. SNR improvement and degree of artifact reduction were evaluated in a NiCl2 doped phantom and human brains. The technique was found to reduce inhomogeneities as large as 30% of the peak image magnitude in all three spatial directions in the brain using a standard head coil.
摘要
这项工作提出了一种小翻转角3D定制射频层选脉冲，用于减少3T场强下的B1场不均匀性。补偿后的切片轮廓由B1场不均匀性图谱确定。在掺NiCl2的体模和人脑上评估了信噪比的改善情况和伪影减少程度。结果发现，使用标准头部线圈时，该技术可在大脑的所有三个空间方向上减少高达峰值图像幅度30%的不均匀性。
相似文献
1
Small tip angle three-dimensional tailored radiofrequency slab-select pulse for reduced B1 inhomogeneity at 3 T.
Magn Reson Med. 2005 Feb;53(2):479-84. doi: 10.1002/mrm.20358.
2
Strategies for improved 3D small-tip fast recovery imaging.
Magn Reson Med. 2014 Aug;72(2):389-98. doi: 10.1002/mrm.24947. Epub 2013 Oct 11.
3
Four dimensional spectral-spatial fat saturation pulse design.
Magn Reson Med. 2014 Dec;72(6):1637-47. doi: 10.1002/mrm.25076. Epub 2013 Dec 17.
4
Tailored excitation in 3D with spiral nonselective (SPINS) RF pulses.
Magn Reson Med. 2012 May;67(5):1303-15. doi: 10.1002/mrm.23118. Epub 2011 Aug 12.
5
Small-tip fast recovery imaging using non-slice-selective tailored tip-up pulses and radiofrequency-spoiling.
Magn Reson Med. 2013 Mar 1;69(3):657-66. doi: 10.1002/mrm.24289. Epub 2012 Apr 17.
6
Slice-selective RF pulses for in vivo B1+ inhomogeneity mitigation at 7 tesla using parallel RF excitation with a 16-element coil.
Magn Reson Med. 2008 Dec;60(6):1422-32. doi: 10.1002/mrm.21739.
7
Advanced three-dimensional tailored RF pulse for signal recovery in T2*-weighted functional magnetic resonance imaging.
Magn Reson Med. 2006 Nov;56(5):1050-9. doi: 10.1002/mrm.21048.
8
Interplay between intensity standardization and inhomogeneity correction in MR image processing.
IEEE Trans Med Imaging. 2005 May;24(5):561-76. doi: 10.1109/TMI.2004.843256.
9
SA2RAGE: a new sequence for fast B1+ -mapping.
Magn Reson Med. 2012 Jun;67(6):1609-19. doi: 10.1002/mrm.23145. Epub 2011 Aug 29.
10
Slice-by-slice B1+ shimming at 7 T.
Magn Reson Med. 2012 Oct;68(4):1109-16. doi: 10.1002/mrm.23319. Epub 2011 Dec 27.
引用本文的文献
1
Multidimensional RF pulse design using auto-differentiable spin-domain optimization and its application to reduced field-of-view imaging.
Magn Reson Med. 2025 Jun 16. doi: 10.1002/mrm.30607.
2
Bilateral orthogonality generative acquisitions method for homogeneous images using parallel transmission at 7 T.
Magn Reson Med. 2025 Mar;93(3):1043-1058. doi: 10.1002/mrm.30329. Epub 2024 Oct 7.
3
Multidimensional RF pulse design with consideration of concomitant field effects.
Magn Reson Med. 2025 Feb;93(2):718-729. doi: 10.1002/mrm.30311. Epub 2024 Oct 4.
4
Improvement in Intraoperative Image Quality in Transcranial Magnetic Resonance-Guided Focused Ultrasound Surgery Using Transmitter Gain Adjustment.
Stereotact Funct Neurosurg. 2023;101(4):223-231. doi: 10.1159/000531009. Epub 2023 Jun 28.
5
Parallel transmission 2D RARE imaging at 7T with transmit field inhomogeneity mitigation and local SAR control.
Magn Reson Imaging. 2022 Nov;93:87-96. doi: 10.1016/j.mri.2022.08.006. Epub 2022 Aug 5.
6
Transverse relaxometry with transmit field-constrained stimulated echo compensation.
MAGMA. 2019 Dec;32(6):669-677. doi: 10.1007/s10334-019-00769-9. Epub 2019 Jul 23.
7
Investigating and reducing the effects of confounding factors for robust T and T mapping with cardiac MR fingerprinting.
Magn Reson Imaging. 2018 Nov;53:40-51. doi: 10.1016/j.mri.2018.06.018. Epub 2018 Jun 30.
8
Evaluation of B inhomogeneity effect on DCE-MRI data analysis of brain tumor patients at 3T.
J Transl Med. 2017 Dec 2;15(1):242. doi: 10.1186/s12967-017-1349-7.
9
T mapping of cerebrospinal fluid: 3 T versus 7 T.
MAGMA. 2018 Jun;31(3):415-424. doi: 10.1007/s10334-017-0659-3. Epub 2017 Nov 6.
10
Homogeneous non-selective and slice-selective parallel-transmit excitations at 7 Tesla with universal pulses: A validation study on two commercial RF coils.
PLoS One. 2017 Aug 21;12(8):e0183562. doi: 10.1371/journal.pone.0183562. eCollection 2017.
本文引用的文献
1
A k-space analysis of small-tip-angle excitation. 1989.
J Magn Reson. 2011 Dec;213(2):544-57. doi: 10.1016/j.jmr.2011.09.023.
2
The signal-to-noise ratio of the nuclear magnetic resonance experiment. 1976.
J Magn Reson. 2011 Dec;213(2):329-43. doi: 10.1016/j.jmr.2011.09.018.
3
Variable-density spiral 3D tailored RF pulses.
Magn Reson Med. 2003 Nov;50(5):1100-6. doi: 10.1002/mrm.10623.
4
Transmit SENSE.
Magn Reson Med. 2003 Jan;49(1):144-50. doi: 10.1002/mrm.10353.
5
High-resolution, spin-echo BOLD, and CBF fMRI at 4 and 7 T.
Magn Reson Med. 2002 Oct;48(4):589-93. doi: 10.1002/mrm.10252.
6
Polarization of the RF field in a human head at high field: a study with a quadrature surface coil at 7.0 T.
Magn Reson Med. 2002 Aug;48(2):362-9. doi: 10.1002/mrm.10197.
7
Multishot 3D slice-select tailored RF pulses for MRI.
Magn Reson Med. 2002 Jul;48(1):157-65. doi: 10.1002/mrm.10194.
8
Different excitation and reception distributions with a single-loop transmit-receive surface coil near a head-sized spherical phantom at 300 MHz.
Magn Reson Med. 2002 May;47(5):1026-8. doi: 10.1002/mrm.10153.
9
Detunable transverse electromagnetic (TEM) volume coil for high-field NMR.
Magn Reson Med. 2002 May;47(5):990-1000. doi: 10.1002/mrm.10141.
10
Analysis of wave behavior in lossy dielectric samples at high field.
Magn Reson Med. 2002 May;47(5):982-9. doi: 10.1002/mrm.10137.
Zotero 插件