- Comparison 4 parallel coil and standard RF head coil:
- FA and MD comparable within less than 5-10%
- RF shading different in anterior/frontal area
- Geometry distortions/differences in both anterior and posterior area, most in posterior superior area
- Tissue intensities: about 5%-6% gain in four channel coil
- 4C: WM/GM temporal 441/291 = 1.51; central (caudateGM) 515/435 = 1.18
- Standard: WM/GM temporal 399/278 = 1.43; central (caudateGM) 371/415 = 1.11
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File:DifferenceImageCoilComparison.jpgDifference image shows both the shading differences and the geometry distortion
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File:OverlayCoilComparison.jpgRed: 4 grad coil, Green: standard Head coil. Geometric differences at posterior superior are quite large
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