Cambridge Research Systems MR Confon Starter f MKII+ User manual

MR Confon Starter f MKII+ User Guide
Version(R01(June(2017(
Cambridge Research Systems Limited
80 Riverside
Sir Thomas Longley Road
Rochester
Kent
ME2 4BH
England
www.crsltd.com

MR Confon Starter f MKII+ User Guide
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Revision Number
Date
Who
Description
R01
06/06/2016
D POLYMENOPOULOS;
S ELLIOTT
First Issue
! !

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Table of Contents
Introduction*.................................................................................................................................*3!
Symbols!........................................................................................................................................................!3!
Starter*f*MKII+*Components*...................................................................................................*4!
Headphones!................................................................................................................................................!5!
Amplifier!......................................................................................................................................................!7!
BNC!Connectors!........................................................................................................................................!8!
RF!Filter!Elements!...................................................................................................................................!9!
Technologist!Microphone!..................................................................................................................!10!
Filter!Box!...................................................................................................................................................!10!
Desktop!Speakers!..................................................................................................................................!11!
Analogue!to!Digital!Converter!.........................................................................................................!12!
Cables!.........................................................................................................................................................!13!
Memory!Foam!Cushions!.....................................................................................................................!15!
Control*Room*Assembly*........................................................................................................*16!
Starter!f!MKII+!Amplifier!Setup!......................................................................................................!16!
Connect!Headphone!Cable!................................................................................................................!16!
Connecting!to!the!Filter!Box!.............................................................................................................!17!
Connecting!the!Desktop!Monitor!Speakers!...............................................................................!18!
Connecting!the!Microphone!.............................................................................................................!20!
Connecting!Patient!Microphone!(optional)!...............................................................................!20!
Analogue!Audio!Setup!.........................................................................................................................!21!
AudioFile!Setup!......................................................................................................................................!22!
MRI*Room*Assembly*...............................................................................................................*24!
Headphones!.............................................................................................................................................!24!
Filter!Elements!.......................................................................................................................................!24!
Starter*f*MKII+*Amplifier*Quick*Reference*Sheet*.........................................................*26!
The!Amplifier!..........................................................................................................................................!26!
Technologist!Microphone!..................................................................................................................!28!
Getting!Started!........................................................................................................................................!29!
Safety*Warnings*........................................................................................................................*32!
Life!support!applications!...................................................................................................................!32!
Magnetic!fields!........................................................................................................................................!32!
Servicing!....................................................................................................................................................!32!
Cleaning*.......................................................................................................................................*32!
Dimensions*................................................................................................................................*33!
Safety*Conformance*................................................................................................................*33!
Contact*.........................................................................................................................................*33!

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Introduction
Thank you for purchasing the MR Confon Starter f MKII+ MRI Audio System.
The equipment delivers high-fidelity acoustic stimuli for fMRI while also
attenuating scanner noise. Electro-dynamic driver technology uses the magnetic
field of the MRI scanner to drive the headphone membranes. This results in
powerful speakers with an excellent frequency response across a wide dynamic
range.
The package integrates perfectly with AudioFile1, a novel USB sound processor
with automated synchronous triggering capabilities, to give you the controls you
need for rigorous multimodal EEG/fMRI studies.
Symbols
This manual contains international MR symbols as well as symbols to aide in
general handling and installation of the equipment.
MR SAFE: These items can go into the MRI room. No displacement
with any field strength of any MRI scanner.
MR-CONDITIONAL: These items must only go into the MRI room
if specified installation and usage instructions are followed.
MR UNSAFE: Never take these items into the MRI room. SERIOUS
DANGER FROM THE MAGNETIC FIELD EXISTS WITH THESE
ITEMS.
WARNING: General warning regarding handling and installation.
1Sold separately – see: http://www.crsltd.com/audiofile for more information

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Starter f MKII+ Components
The Starter f MKII+ package is shipped with the following components:
Headphone(s) with integrated BNC cable
Memory foam cushions
RF Filter elements (BLP 1.9+)
BNC connectors
Amplifier and power supply
Technologist microphone
Desktop speakers
Stereo filter/Transformer box
Analogue to Digital Converter
2x5m and 2.5m, red and white BNC cables (Nos. 1 - 3 / Nos. 3 - 6).
Stereo audio cable (No. 7)
Speaker cable (No. 8)
TOSLINK optical cable (No. 9)
XLR to BNC adapter [Headphone cable] (No. 10)

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Headphones
The Starter f MKII+ package includes one or more pairs of MR Safe
headphones and/or earbuds.
Model HP PI US 03
The HP PI US headphone features an ultra-slim design that accommodates most
adult participants in any head coil. They use piezoelectric technology, which
allows them to work inside and outside the MRI room.
Figure 1 : Model HP PI US 03

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MR Confon headphones and earbuds are available in a variety of sizes and cable
routing arrangements to suit different head coil designs. Some designs only
work inside the bore of the MRI scanner. Please refer to the table below for
more information about other available headphones.
Table 1 : MR Confon Headphone List
Headphones
Features
Size
Headcoil
HP SI 01
Standard headphone with excellent
passive gradient noise dampening
and powerful electrodynamic
speaker system.
32mm thick.
Dimensions: outer
85x105mm, inner
45x65mm.
Available for Philips and GE scanners.
Compatible with 8 and 12 channel
head coils.
HP SC 01
Special version of HP SI 01 with
additional compensation element
optimized for use with Siemens
scanners.
32mm thick
For Siemens scanners and larger volume
head coils (i.e. not 32/64 channel).
HP SC 02
Same features as HP SC 01, but
6mm slimmer and with special foam
cushion set.
26mm thick
Compatible with Siemens 8 and 12
channel head coils.
HP SIE 01
Special version of HP SI 01 with
additional piezo drivers. Can be used
inside or outside the scanner.
32mm thick
Available for Philips and GE scanners.
HP VS 01
Smaller version of HP SI 01.
20mm thick
Optimised for Philips and GE 32-
channel head coils. Also for use with 8
channel head coil and thick foam
cushion.
HP VS 02
Very small version of HP SI 01 with
tilted cable management.
14mm thick
Optimised for Philips and GE head &
neck coils.
HP PI US
Ultra small on-ear piezo headphone
for use in modern multi-channel
head coils with a diameter down to
190mm. Also consider alternate HP
AT 01 insert earphone (earbud)
design.
Dimensions: outer
80x105mm, inner
45x70mm.
Works with any head coil. Works inside
and outside the scanner.
HP M 01
Same electrodynamic driver system
as of HP SI 01 or HP SC 01. Small
headphones, optimized for use with
children and NHP. Special version
for pure passive dampening or
matched, non MRI-compatible (MR
Unsafe) headphones are available.
Dimensions: outer
60mm, inner
25mm.
Available for Siemens, Philips and GE
scanners.

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Amplifier
The Starter f MKII+ amplifier is MR Unsafe and should not be installed
in the MRI room.
The Starter f MKII+ amplifier can drive headphones, external speakers, and
supports an optional headcoil-mounted noise-cancelling microphone. It has a
digital I/O interface for direct integration with the MRI scanner.
Figure 2 : Starter f MKII+ Amplifier
The amplifier is shipped with its own power supply and region-specific plug as
shown in Figure 3. Plug the power cable into the rear of the amplifier. For the
location of the Power In Port, see The Amplifieron page 26 of the
Starter f MKII+ Amplifier Quick Reference Sheet.
Figure 4 : Power for Starter f MKII+ Amplifier

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BNC Connectors
BNC connectors are MR-Conditional because they contain
ferromagnetic material.
Connectors must be securely fastened, while any connectors not
used should be removed from the MRI room.
As each MRI scanner installation is slightly different, the following BNC
connectors are supplied to aide BNC cable connection in the MRI and
Technologist rooms.
Figure 5 : BNC Connectors
In brief:
• Inline couplers connect two male BNC cables
• Male couplers connect two female BNC cables
• T-piece and Y connectors split the BNC cable signal
• 90 Degree connectors are used to rotate the filter setup

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RF Filter Elements
The filter elements are MR-Conditional because they are made
from BNC connectors which contain ferromagnetic material.
BNC connectors that do not make up the filter elements should be
removed from the MRI room. All filter elements in the MRI room
must be securely fastened. Please note that you may not need to
use all the supplied BNC connectors that are included in the
package. It is strongly advised that the filter elements are fitted
with the least possible number of BNC connectors.
The left and right filter elements are mounted inside the MRI room, at the RF
Filter Panel. The filter elements are supplied pre-assembled and connect to the
headphone’s left and right channel inputs.
Figure 6: Filter Elements
For more information about filter elements and how to connect them to your
MR Confon headphones, see Filter Elements on page 24 of the MRI Room
Assembly.