Difference between revisions of "MBIRN: structural calibration dissemination"

Latest revision as of 14:04, 18 December 2006

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Overview of dissemination contents
- Multi-site phantom data: phantom that helps asses image distortions from gradient non-linearities
- Multi-site human data: healthy volunteers, most of which were scanned twice at the participating sites
- Human Protocol: multi-spectral 3D structural (FLASH with multiple flip angles: 30, 20, 5, 3 degrees)
- Sites: Five sites with different 1.5T systems (Siemens, GE, Philips/Picker)

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-* '''Human Acquisition Protocol'''
+* [[Media:MBIRN-scan-summary-table.pdf| mBIRN data dissemination overview]]
- Sequence: 3D spoiled gradient echo (FLASH type)
- Vendor's standard birdcage RF coil
- Slice orientation: Sagittal
- No partial Fourier
- NEX=1
- FOV= 25cm
- Phase matrix=192
- Readout matrix=256
- Number of Slices: 124 (no skip, whole head coverage, avoid wrap around)
- Slice Thickness: 1.3mm-1.5mm
- TE= minimum allowed with centered (symmetric) echo.
- TR=20 ms
- Slab Selection: No (i.e., hard RF pulses)
- scan 1: flip angle 30 degrees  (T1-weighted image)
- scan 2: flip angle 5 degrees (proton-density-weighted image)
- scan 3: flip angle 20 degrees (T1-weighted image)
- scan 4: flip angle 3 degrees  (proton-density-weighted image)
- Acquisition time per scan: about 8min 12sec
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-* '''Phantom Acquisition Protocol'''
- Sequence: 3D spoiled gradient echo (FLASH type)
- Vendor's standard birdcage RF coil
- Slice orientation: Sagittal
- No partial Fourier
- NEX=1
- FOV= 40cm
- Phase matrix=192
- Readout matrix=256
- Number of Slices: 124 (no skip, whole phantom coverage, avoid wrap around)
- Slice Thickness: 2 mm
- TE= minimum allowed with centered (symmetric) echo.
- TR=20 ms
- Slab Selection: No (i.e., hard RF pulses)
- scan 1: flip angle 30 degrees without vendor's distortion correction
- scan 2: flip angle 30 degrees with vendor's distortion correction (if available)
- Acquisition time per scan: about 8min 12sec
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