Dear Harold,
Presentation has a number of special features for interfacing
scanners with stimulus delivery. For example, there are "fmri_type"
scenarios, whereby events are triggered (with or without delays) by pulses
from the scanner. These scenarios can be developed using fmri_emulation
mode (where the PC generates the "pulses") and extensively tested for
timing precision and reliability using the benchmark testing mode. Another
unique feature of Presentation is that MR pulses can be processed as
interrupts. This makes certain that no pulses will be missed (even if the
program itself is interrupted for some reason). Finally, Presentation can
use pulses of either polarity and essentially any width, making it
compatible with all MR scanners (as far as we know).
Presentation is available at www.neurobs.com as a free, self-extracting,
self-installing download. Once installed, you can use the "hardware
settings" tab to configure and test your connections with the scanner. For
more detailed information you can perform Boolean searches of entries
relating to interfacing Presentation with different scanners in postings to
the NBS forum (accessible from the main website).
Good Luck,
David Woods
At 06:07 PM 6/13/2002 +0200, you wrote:
>Dear SPMers,
>
>we would like to synchronize the beginning of fMRI acquisitions performed on
>a 1,5 GE and the beginning of functional runs where we show visual stimuli
>(bmp pictures).
>Please could you let me know if someone found a solution for such a
>synchronization between GE scanners and presentation softwares. Are specific
>softwares more specific for such a synchronization?
>
>Thank your very much in advance for your help,
>H. Mouras
>----------------------------------------
>Harold Mouras
>Inserm U483 - Université Pierre et Marie Curie
>9, quai Saint Bernard
>75005 Paris
>Téléphone : 33 1 44272624
>Fax : 33 1 44273438
>[log in to unmask]
>------------------------------------------
David L. Woods, Professor of Neurology, Dept. of Neurology,UC Davis,
Chief, Clinical Neurophysiology and Chief, Research fMRI imaging,
Neurology Service (127E), VA-NCHCS, 150 Muir Rd., Martinez, CA 94553
Tel (925) 372-2571, Fax (925) 229-2315 Email:[log in to unmask]
Publications: http://marva4.ebire.org/hcnlab
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