What is the minimal fMRI trigger pulse duration detected by Lumina 3G?

Hello,

I wonder what is the minimal scanner trigger pulse duration detected by Lumina 3G? I found that the old controller version had 1 ms minimal trigger duration by default, is it true for Lumina 3G as well?

Thank you.

Ekaterina

On the old controller, the minimum scanner trigger duration was about 500µs (0.5 ms).

On the Lumina 3G controller, it is about 20µs.

Thank you! Does it mean that the Siemens optical trigger pulse (10µs) would be missed?

Actually, I was wrong; see the Lumina controller Specifications page:

Minimum ‍pulse ‍duration ‍is ‍‍7μs ‍and ‍minimum ‍gap ‍between ‍pulses ‍is ‍‍400µs.

The Siemens optical trigger pulse of 10µs should work.