Polarization of the RF field in a human head at high field: A study with a quadrature surface coil at 7.0 T

Magnetic Resonance in Medicine

Volumn 48, Issue 2, 2002, Pages 362-369

  Wang, Jinghua ^a   Yang, Qing X ^a   Zhang, Xiaoliang ^b   Collins, Christopher M ^a   Smith, Michael B ^a   Zhu, Xiao Hong ^b   Adriany, Gregor ^b   Ugurbil, Kamil ^b   Chen, Wei ^b  

^a PENN STATE COLLEGE OF MEDICINE   (United States)

^b UNIVERSITY OF MINNESOTA   (United States)

Author keywords

Computer modeling; High field MRI; RF coil; RF field polarization

Indexed keywords

COIL DESIGNS; COMPUTER MODELING; HIGH FIELD MRI; IMAGE INTENSITY DISTRIBUTION; RF COIL; RF FIELDS; SURFACE COILS; WAVE BEHAVIOR;

POLARIZATION;

ARTICLE; ARTIFACT REDUCTION; BRAIN; COMPUTER MODEL; GEOMETRY; HUMAN; IMAGE ANALYSIS; IMAGE INTENSIFIER; MAGNETIC FIELD; MATHEMATICAL ANALYSIS; NUCLEAR MAGNETIC RESONANCE IMAGING; PHANTOM; POLARIZATION; RECEPTIVE FIELD;

EID: 0036324249     PISSN: 07403194     EISSN: None     Source Type: Journal    
DOI: 10.1002/mrm.10197     Document Type: Article

References (33)

1. 2O as RF coils for high-field MR imaging and spectroscopy
2. Analysis of RF penetration effects in MRI using finite-difference time-domain method
3. Radiofrequency field propagation in conductive NMR samples
4. Standing waves in uniform water phantoms
5. A spiral volume coil for improved RF field homogeneity at high static magnetic field strength
6. Dielectric resonances and B1 field inhomogeneity in UHFMRI: Computational analysis and experimental findings
7. High frequency volume coils for clinical NMR imaging and spectroscopy
8. Standing wave and RF penetration artifacts caused by elliptic geometry: An electrodynamics analysis
9. 7T vs. 4T: RF power, homogeneity, and signal-to-noise comparison in head images
10. Spectroscopy and imaging with a 4 Tesla whole-body MR system
11. Reduction of RF penetration effects in high field imaging
12. Different excitation and reception distributions with a single-loop transmit-receive surface coil near a head-sized spherical phantom at 300 MHz
13. Comparison of linear and circular polarization for magnetic resonance imaging
14. Analysis of wave behavior in dielectric sample at high field
15. Quadrature detection coil - A further √2 improvement in sensitivity
16. Quadrature coil system for simultaneous reception
17. Flexible quadrature coil system for simultaneous reception of magnetic resonance signals
18. An integrated head immobilization system and high-performance RF coil for fMRI of visual paradigms at 1.5 T
19. Fast MR imaging of abdomen: Application of the QD body coil and low refocusing flip angle
20. Planar quadrature coil design using shielded-loop resonators
21. An improved quadrature or phased-array coil for MR cardiac imaging
22. Simultaneous acquisition of spatial harmonics (SMASH): Fast imaging with radiofrequency coil arrays
23. SENSE: Sensitivity encoding for fast MRI
24. Description of parallel imaging in MRI using multiple coils
25. Radio frequency magnetic field mapping of a 3 Tesla birdcage coil: Experimental and theoretical dependence on sample properties
26. Signal-to-noise ratio and absorbed power as functions of main magnetic field strength, and definition of "90°" RF pulse for the head in the birdcage coil
27. Numerical solution of initial boundary value problems involving Maxwell equations in isotropic media
28. The principle of reciprocity ill signal strength calculations - A mathematical guide
29. Sensitivity and power deposition in a high-field imaging experiment
30. The effect of sample loading on the radio frequency magnetic field distribution in high field: Contributions of dielectric resonance
31. Electromagnetic fields of surface coil in vivo NMR at high frequencies