Q-Sense Technical Reference Manual
Proprietary
183 of 188
The Q-sense fMRI thermode incorporates an EMI filter designed to reduce and prevent
electromagnetic interference noise from penetrating into the scanner room. The fMRI filter
includes:
Minimal insertion loss : 10MHz/13dB, 100MHz/50dB, and 1GHz/70dB.
Capacitance: 4000pF
Non-ferromagnetic filter components
The filters are to be connected via appropriate 9-pin D-type cutouts in the
penetration panel, with the thermode air tube to be passed through a
waveguide of appropriate dimensions (according to the MRI scanner
manufacturer design).
Loosely connected cable connectors or use of conductive tape or braid
may lead to interference noise and imaging artifacts.
The fMRI Thermode is “MR Conditional”. An extended 13 [m] cable connects between the Q-sense
system, which is located outside of the MRI control room, and the Thermode that is located in the
MRI room. The part of the thermode inside the room is 10 [m] long, and the part outside the
room is 3 [m] long.
"MR Conditional" means an item that has been demonstrated to pose no
known hazards in a specified MR environment with specified conditions of
use.
26.1.2
Installation
–
MR Filter
1.
Complete the setup and installation procedure as described for a regular Q-sense system,
according to the System Block diagram below.
2.
Connect the system devices according to the following stages:
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