I only have experience with Siemens scanners, but typically if you want more
directions you have to hack the sequence code. As long as your gradients
are in the right format (and normalized if your scanner requires that), I
don't see why you couldn't use whatever directions you wanted.
Peace,
Matt.
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf
Of Ted Yanagihara
Sent: Thursday, May 15, 2008 9:47 PM
To: [log in to unmask]
Subject: [FSL] User defined gradient table for Philips Achieva
Hi everyone,
I know that there have been lots of discussions about getting the
gradient directions from the par/rec files, but I haven't been able
to find any threads on manually defining them on the scanner. The
"maximum" option on the console only gives 32 directions, but we
would like to see how things improve by manually increasing the
number of directions. Does anyone have experience with generating a
table of gradient directions? Would it make sense to use the bvecs
from a GE scanner?
Thanks in advance,
ted
|