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Literature DB >> 19336276

B1 homogenization in MRI by multilayer coupled coils.

Shumin Wang¹, Joseph Murphy-Boesch, Hellmut Merkle, Alan P Koretsky, Jeff H Duyn.

Abstract

Transmit B(1)(+) field homogenization in high-field ( > 3.0 T) human magnetic resonance imaging (MRI) is challenging due to radio-frequency wavelength effects. An approach based on appropriately coupling surface coils to a volume coil was investigated. Electromagnetic simulation results demonstrated the feasibility and effectiveness of this method in proton MRI of the human head at 7.0 T.

Entities: Chemical Gene Species

Mesh：

Year: 2009 PMID： 19336276 PMCID： PMC3197805 DOI： 10.1109/TMI.2008.2006523

Source DB: PubMed Journal: IEEE Trans Med Imaging ISSN： 0278-0062 Impact factor: 10.048

10 in total

1. A hybrid inverse approach applied to the design of lumped-element RF coils.

Authors: H Fujita; L S Petropoulos; M A Morich; S M Shvartsman; R W Brown
Journal: IEEE Trans Biomed Eng Date: 1999-03 Impact factor: 4.538

2. Effect of RF coil excitation on field inhomogeneity at ultra high fields: a field optimized TEM resonator.

Authors: T S Ibrahim; R Lee; B A Baertlein; A M Abduljalil; H Zhu; P M Robitaille
Journal: Magn Reson Imaging Date: 2001-12 Impact factor: 2.546

3. A time-harmonic inverse methodology for the design of RF coils in MRI.

Authors: Ben G Lawrence; Stuart Crozier; Desmond D Yau; David M Doddrell
Journal: IEEE Trans Biomed Eng Date: 2002-01 Impact factor: 4.538

4. Transmit SENSE.

Authors: Ulrich Katscher; Peter Börnert; Christoph Leussler; Johan S van den Brink
Journal: Magn Reson Med Date: 2003-01 Impact factor: 4.668

5. Focused, eight-element transceive phased array coil for parallel magnetic resonance imaging of the chest--theoretical considerations.

Authors: Bing Keong Li; Feng Liu; Stuart Crozier
Journal: Magn Reson Med Date: 2005-06 Impact factor: 4.668

6. Manipulation of image intensity distribution at 7.0 T: passive RF shimming and focusing with dielectric materials.

Authors: Qing X Yang; Weihua Mao; Jinghua Wang; Michael B Smith; Hao Lei; Xiaoliang Zhang; Kamil Ugurbil; Wei Chen
Journal: J Magn Reson Imaging Date: 2006-07 Impact factor: 4.813

7. Analysing radio-frequency coil arrays in high-field magnetic resonance imaging by the combined field integral equation method.

Authors: Shumin Wang; Jeff H Duyn
Journal: Phys Med Biol Date: 2006-06-06 Impact factor: 3.609

8. 9.4T human MRI: preliminary results.

Authors: Thomas Vaughan; Lance DelaBarre; Carl Snyder; Jinfeng Tian; Can Akgun; Devashish Shrivastava; Wanzahn Liu; Chris Olson; Gregor Adriany; John Strupp; Peter Andersen; Anand Gopinath; Pierre-Francois van de Moortele; Michael Garwood; Kamil Ugurbil
Journal: Magn Reson Med Date: 2006-12 Impact factor: 4.668

9. Reduction of transmitter B1 inhomogeneity with transmit SENSE slice-select pulses.

Authors: Zhenghui Zhang; Chun-Yu Yip; William Grissom; Douglas C Noll; Fernando E Boada; V Andrew Stenger
Journal: Magn Reson Med Date: 2007-05 Impact factor: 4.668

10. On the field inhomogeneity of a birdcage coil.

Authors: J Jin; G Shen; T Perkins
Journal: Magn Reson Med Date: 1994-09 Impact factor: 4.668

10 in total

6 in total

B1 homogenization in MRI by multilayer coupled coils.

1. A hybrid inverse approach applied to the design of lumped-element RF coils.

2. Effect of RF coil excitation on field inhomogeneity at ultra high fields: a field optimized TEM resonator.

3. A time-harmonic inverse methodology for the design of RF coils in MRI.

4. Transmit SENSE.

5. Focused, eight-element transceive phased array coil for parallel magnetic resonance imaging of the chest--theoretical considerations.

6. Manipulation of image intensity distribution at 7.0 T: passive RF shimming and focusing with dielectric materials.

7. Analysing radio-frequency coil arrays in high-field magnetic resonance imaging by the combined field integral equation method.

8. 9.4T human MRI: preliminary results.

9. Reduction of transmitter B1 inhomogeneity with transmit SENSE slice-select pulses.

10. On the field inhomogeneity of a birdcage coil.

1. Transmit B1-field correction at 7 T using actively tuned coupled inner elements.

2. Field shaping arrays: a means to address shading in high field breast MRI.

3. Radiofrequency pulse designs for three-dimensional MRI providing uniform tipping in inhomogeneous B₁ fields.

4. A method to localize RF B₁ field in high-field magnetic resonance imaging systems.

5. A radially interleaved sodium and proton coil array for brain MRI at 7 T.

6. Improvement of magnetic resonance imaging using a wireless radiofrequency resonator array.