Hi. I posted a message the other day about a proposed fMRI experiment, but
was not clear in my description of the proposed design.
The study involves using sparse imaging, that is to say, for each 12 second
TR, 3-4 word stimuli will be presented auditorily during the initial 7.6
seconds of the TR during when there is no scanner noise, this then will be
followed by the 4.4 second volume acquisition, during which no stimuli will
be presented. This is a kind of halfway house between block and event
related designs. The question is, for such a design, how many volumes
would be necessary per condition. I would like it to be 24, with that I
could run the ideal number of conditions. If it must be more, then I will
need to lose a condition. We will be using a 3T magnet.
- Mike
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Mike Ford
MRC Cognition & Brain Sciences Unit
[Ex Applied Psychology Unit] Tel: 01223 355294 ext 241
15 Chaucer Road Fax: 01223 359062
Cambridge
CB2 2EF email: [log in to unmask]
http://www.mrc-cbu.cam.ac.uk/personal/mike.ford
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