Setting up a MEGA-PRESS scan with the Philips patch

***These instructions are no longer current 9/2014***

These instructions are intended to help anyone with our patch get things set up for GABA editing. They are Philips- and patch-specific.

1. Start with a short-TE PRESS scan
2. In Initial, increase the TE to 68 ms.
3. In Geometry, change the voxel size to ~3x3x3 cm^3.
4. In Contrast:
• Change Gradient mode to Maximum and PNS mode to high.
• Select MEGA basic in BASING pulse options.
• Pulse duration 14ms, freq1 7.46 ppm, freq2 1.9 ppm. [OFF first, edit 8/19/12]
5. In Motion, set phase cycles and averages to 8, startup acquisitions 0 and turn off frequency correction.
6. In Dyn/ang, Dynamic study individual, 40 dynamic scans.
7. In Postproc, turn off spectral correction.
8. Set up a separate non-water-suppressed PRESS scan for quantification relative to water.