071-CRS-0062_R05_User Guide_BOLDscreen
Contents
1. Note The status LED is present on all models of BOLDscreen but requires the bootloader and main firmware dated April 2012 or later to be functional Trigger input optional Connect the supplied trigger cable from the control input to a filtered BNC feedthrough on the penetration panel on the magnet room Then use a suitable lead not supplied to connect from the feedthrough to a suitable TTL level control signal from the stimulus computer or graphics system IMPORTANT If connecting to a device not conforming with EN60601 1 e g a computer then an appropriate isolator must be used to maintain conformance to EN60601 1 of the system Dynamically controlling the backlight level non MRI use only Because of the need to attach a USB cable to BOLDscreen this mode is only supported for non MRI use only Do not attempt to use a USB cable in the magnet room it will be attracted to the magnet and will cause interference Also note that changing the backlight level necessitates the use of a different calibration gamma correction of the stimulus generation system The Cambridge Research Systems Visage and Bits stimulus systems can select which gamma correct file to use dynamically in a similar manner to the change of backlight intensity shown here A virtual serial port can be enabled over the USB connector which allows real time updates of the backlight level and gives access to status information about the display Edit the BO2. BOLDscreen 2012 model user manual Intended Use BOLDscreen is an MRI safe SuperBright HD LCD monitor with LED backlight intended to display visual stimuli for fMRI experiments It s safe to install in the scanner magnet room and the crisp precision adjustable images can be viewed using standard head coil mounted mirrors BOLDScreen Monitor BOLDScreen s 1920x1200 LCD is backlit by an array of SuperBright LEDs and is DC driven It has a USB connection backlight trigger input female DVI connector and a 15 pin DC power connector The all aluminium enclosure provides MRI compatible shielding and passive cooling There are no controls on the monitor configuration is via a XML file on the memory card inserted in the side of the monitor PLEASE READ THE SAFETY WARNINGS BEFORE INSTALLING OR USING BOLDscreen System components Four plastic clamps with four M6 Stainless attachment bolts BOLDScreen 1920x1200 MRI compatible monitor Dust cover Fibre optic DVI cable 4mm Titanium Hex key J aAA N Aluminium Stand AC mains power supply PSU H f i j f j fi 4 fi H li e Mains lead fd L ON Fi f y A d N id Vd f i f o AN i LJ K oO e Shielded DC supply cable Ad e Backlight trigger cable A e USB lead amp e Packaging materials amp You may wish to retain the packaging for future use Mounting Options Permanent or tempor
3. Before then attempting to attach the monitor the clamps should be attached to the mounting holes on the back of BOLDscreen see diagram below Non magnetic Stainless screws are supplied for this Do not fully tighten the screws yet The clamps then slide over the upper telescoping part of the stand and should be gently tightened using the provided MRI Safe hex key A few centimetres of stand should protrude from the upper clamp Any further adjustment should be carried out using the adjustment screw on the side of the stand Be careful to not trap your fingers when adjusting the stand Adjustment should only be carried out by 2 people one person should support the weight of the monitor while the other loosens and retightens the adjustment screw If using the stand use the clamps and screws on the inner 4 holes 2 VESA standard mount 200mm x 200mm M6 BOLDscreen can in principle be used with any standard VESA mount MRI compatibility of the mount MUST be established by the installer The 4 mounting holes are on a 200mm x 200mm spacing and take M6 screws The screws are not supplied as this depends on the mount used The screws should engage by between 5 to 8mm into the monitor We recommend that either stainless steel A4 grade or titanium screws are used This mounting method is designed for installations where the screen is permanently installed in the magnet room Consult your MRI installer about this mounting option The mount
4. are need for the PSU against a magnet quench UNDER NO ACCOUNT SHOULD THE PSU BE POWERED IN THE HIGH FIELD AREA OF THE MAGNET AND IT MUST BE LOCATED SO THE PSU AND ITS CABLES ARE OUT OF REACH OF THE SUBJECT It should not normally be necessary to change one of the fuses If however it is suspected that one of the fuses has blown proceed as follows Remove the power supply from the magnet room of the scanner Disconnect the mains lead from the connector at the side of the power supply Pull out the small drawer containing the fuses alongside the on off switch Replace the fuses with the same rating and type as given in the specifications Cables oN Cables are rated MRI Conditional the connectors contain steel and should not be left unattached within high gradient areas If plugged in with the jack screws tightened they are safe if not they should be kept at the same distance as the PSU Left unattached in high field zones they might start to exhibit some movement Route all cables around the edge of the room and NOT across the doorway to prevent trip hazard and to avoid damage to them On no account must the DC supply cable route over the subject in the scanner as a serious RF burn hazard exists Cleaning Clean external components of BOLDscreen with a damp cloth only Do NOT allow fluids to enter the monitor or PSU Do not sterilise in an autoclave If after prolonged use dust becomes trapped behind the outer front
5. ED AGAIN UNTIL THE FIRMWARE UPDATE HAS COMPLETED Depending on the version of the bootloader the status LED may flash red during a firmware update The backlight level and left right reversal of the screen are controlled by the BOLDScreen_CFG xml file located in the firmware subdirectory of the SDcard This file can be edited with any text editor e g Notepad on Windows or Textedit on Apple computers lt xml version 1 0 gt lt BOLDScreen_CFG gt lt Entry USB MSD ON gt Control the interfaces exposed on the USB lt Entry USB CDC OFF gt A disk drive USB_MSD or serial port USB_CDC can be enabled Currently only one interface can be enabled at a time The CDC mode was introduced in March 2012 firmware lt LUMINANCE gt lt Entry Candela 800 gt The target luminance of the display in cd m lt LUMINANCE gt lt PWM gt lt Entry ClockFactor 6 5 gt lt PWM gt lt Entry MIRROR MODE 0 gt lt Entry FibrePower 0N gt lt BOLDScreen_CFG gt Calibration value for the internal luminance sensor actual value will depend on your particular monitor Controls left right reversal of the video 1 reversed for when viewing with a mirror Controls whether power is fed out of the DVI set ON for a fibre optic cable for use in the scanner set OFF for use outside of the scanner with a copper DVI cable This feature was introduced in 2012 Earlier BO
6. H OF THE SUBJECT WHEN SCANS ARE PERFORMED TO PREVENT R F BURNS BOLDscreen should be attached and adjusted ONLY using the purple titanium Allen key using the supplied plastic clamps and stainless steel screws Make sure that all feet of the stand are resting on the floor once BOLDscreen is attached You may find it easier to attach BOLDscreen to the stand in a lower field area then move the two items together to the final position If possible locate BOLDscreen in contact with the magnet to prevent further movement in the event of a magnet quench PSU AAA MRI Conditional safe within the magnet room of 1 5 and 3T scanners but should be kept and operated outside of high magnetic field areas in the magnet room Do not place the PSU in high field gradient areas or the device may move the device contains some ferromagnetic content within a heavy aluminium enclosure DO NOT use a longer mains lead or extension leads as the PSU might then be inadvertently placed in the high field area The PSU is designed to be located on the floor of the magnet room immediately below the filtered mains socket s Walk slowly into the magnet room keeping a firm hold on the device and establish that this area does not cause any pull on the PSU with your installation We DO NOT recommend locating the PSU in the control room as interference will be conducted into the screened room via the cable If the above advice is followed no additional precautions
7. LDScreen_CFG xml file set USB_MSD to OFF and USB _ CDC to ON For Windows operating systems you will need the inf file located in the Drivers subdirectory of the SDcard So make sure you have a copy of this file locally on your computer before restarting BOLDscreen When BOLDscreen is restarted it will now appear as a serial port The serial port should automatically appear the driver is already present on Windows Mac and Linux platforms For testing purposes a terminal emulation program can be used to just type the commands However typically the commands would be scripted as part of the experiment CDC Commands All commands are preceded with a dollar sign S or hash symbol Returned data is always delimited with semicolons gt gt SHelp This will return a list of possible commands See below for explanations for what each does gt gt S Candela new backlight luminance This command takes an integer value for the new aim point for the backlight in cd m If this value is set too high then the backilight will saturate to the maximum luminance it can achieve Similarly a value too low will set the minimum value It is not possible to turn the backlight completely off with this command however a dynamic range of typically 150 1 can be achieved Tip Don t forget the square brackets around the new value gt gt SStart Device starts reporting the current status of the BOLDscreen The values returned are
8. LDscreen units could only be used with fibre optic cables Please note that BOLDscreen WILL NOT WORK WITHOUT THE SDcard INSERTED Be careful not to delete any of the files from the card or change the directory structure BOLDscreen requires the SDcard to be formatted with the FAT filesystem other formats will not function Status LED This is located between the SDcard socket and the power input It indicates the status of the BOLDscreen system LED colour behaviour Interpretation Blue BOLDscreen is working normally and is set to power a fibre optic cable Do NOT connect a non fibre cable when in this mode or initialisation problems may be encountered Green BOLDscreen is working normally and is in non fibre DVI cable mode A fibre optic cable will NOT work in this mode as there is not power for the receiver Flashing red BOLDscreen is updating firmware or persistent configuration information Do not interrupt the power while the LED is flashing Solid red A problem has been detected and BOLDscreen cannot start This usually occurs if the SDcard is missing or not inserted correctly Alternatively if the main application is missing from memory e g after a bootloader update Purple rapid red blue Communication problem between BOLDscreen and the power supply The flashing backlight is switched off in this mode blank screen to protect the backlight LEDs and drivers SWITCH OFF THE PSU and consult Cambridge Research Systems
9. ary installation of BOLDscreen is possible It can also be mounted either way up depending on your viewing optics It should however always be mounted in landscape orientation cooling fins vertical to avoid cooling problems The normal orientation is with the thick part of bezel at the top which will produce a right way up image This is normally correct when BOLDscreen is located at the subjects head end of the magnet bore It would be normal in this case to enable left right reversal of the image to compensate for the mirror that is used to view BOLDscreen this is set using the configuration xml file located on the SDcard of the monitor see Firmware updates and configuration changes It is also possible to set your computer to produce a rotated image rather than physically rotating BOLDscreen Standard mounting options are 1 Mounting on the stand via the clamps provided Raise or lower upper part of stand to suit scanner height Loosen upper adjustment thumbscrew to adjust height Ns Loosen lower adjustment thumbscrew to spread tripod a legs This bracket slides up and down to adjust the spread of the legs LOCK BOTH THUMBSCREWS ONCE ADJUSTMENTS ARE COMPLETE To fit to the stand first loosen the lower locking collar and spread the legs of the tripod stand then retighten the locking thumbscrew Then loosen the upper locking collar and extend the upper telescoping part of the stand Retighten the locking thumbscrew
10. carried out ONLY using the purple Allen key provided It is made out of titanium and is MRI Safe DO NOT UNDER ANY CIRCUMSTANCES TAKE STANDARD STEEL ALLEN KEYS INTO THE MAGNET ROOM DO NOT SUBSTITUTE STEEL MOUNTING SCREWS FOR THE NON MAGNETIC STAINLESS SCREWS SUPPLIED It is recommended that a helper is used when mounting BOLDscreen in the magnet room due to the weight of the unit Walk slowly into the magnet room with BOLDscreen Due to the conductive screened case considerable resistance to movement will be encountered in high field areas due to eddy currents This is normal and don t try to force it to move quickly Always mount BOLDscreen out of reach of the subject The conductive case of BOLDscreen could cause RF burns if touched whilst a scan is in progress During a magnet quench BOLDscreen is likely to be displaced it will be forced against the magnet as it will follow the collapsing field Satisfy yourself that this will not cause any additional hazard with your experimental setup If BOLDscreen is placed hard against the magnet this should prevent it from falling over should a quench occur If triggering the backlight from a non medically approved device then an extra isolator will be needed to maintain EN60601 1 conformance of the system This is necessary for protection against electric shock Stand The supplied BOLDscreen stand is MRI Safe under all foreseeable conditions in MRI magnet rooms THE STAND MUST BE OUT OF REAC
11. cover of the monitor the cover can be removed for cleaning with a suitable rubber sucker The front cover is held in place with Velcro strips around the periphery Apply the rubber sucker to one corner and pull Clean the front cover and replace Plexus or similar plastics cleaner may be used on the front cover BUT AVOID CLEANING OR TOUCHING THE INNER EMI WINDOW DO NOT TAKE AEROLSOL CANS INTO THE MAGNET ROOM Servicing DO NOT ATTEMPT TO DISMANTLE BOLDscreen The BOLDscreen monitor contains no user serviceable components refer all servicing to Cambridge Research Systems The power supply contains dangerous mains voltage and also has no user serviceable parts Do not attempt to remove the bottom access panel Optical hazard The high powered LED backlight could present an eye hazard if viewed directly Therefore do not attempt to operate BOLDscreen if the LCD screen has been damaged or removed Contact Cambridge Research Systems Limited 80 Riverside Sir Thomas Longley Road Telephone 44 1634 720707 Rochester Website www crsltd com Kent United Kingdom ME2 4BH
12. e fixed resolution requirement was deliberate to avoid an extra one frame latency that would be incurred if a rescaler was fitted Your computer graphics card may offer other resolutions which are rescaled to fit the fixed 1920 x 1200 resolution of BOLDscreen This does not normally incur extra latency Calibration BOLDscreen has a nominal 2 2 gamma characteristic However for best performance a gamma correction should be performed Cambridge Research Systems can supply a high luminance version of their ColorCal colorimeter for this purpose The calibration will have to be performed with BOLDscreen located outside of the magnet room BOLDscreen should be allowed to thoroughly warm up for at least 1 hour before a calibration is attempted This allows the LCD panel to thermally stabilise For the ultimate performance a 256 reading calibration should be performed with a linear interpolation curve fit Bopp mmi ee or File Tools Plug ins Help Gamma Correction B y E Active Configuration BOLDscreen vsg Phosphor CIE Lum ed m coordinates y min max Red 0 628 0 340 0 62 10570 Green 0 329 0 608 0 61 392 50 Blue 0 150 0 066 O62 4013 F White 0 62 533 00 i 300 Fi Calibration Completed Successfully A special firmware for the Visage visual stimulator is available that implements temporal dithering for driving 8 bit panels such as BOLDscreen This improves the colour resolution that can be displayed Some computer graphic
13. he top left corner is masked for the built in luminance sensor Brightness maximum at least 1000cd m The normal switching frequency of the backlight is 74 1kHz Typical uniformity 2 over central 75 of display area Automatic compensation of brightness for temperature and ageing factory set to maintain 800cd m Grey to Grey Response time 5ms typical Video Input 1920x1200 pixels DVI 60Hz 24 bit Backlight trigger Opto isolated TTL input O to 5Vdc max RF emissions No effect observed on functional and structural MRI scans at 1 5 and 3T with screen located at exit of scanner bore No effect on displayed image whilst scanning Type B equipment in accordance with EN60601 for devices in the patient environment Monitor Dimensions Dimensions 620 x 445 x 70mm Weight 16 5kg Stand Dimensions Height adjustable 1000 1800mm Weight 2 5kg Power Supply Mains Input 100 to 240Vac nominal 50 or 60Hz 150w Output 5 15 and 35 to 45Vdc Fuses HBC T3 15A 250VAC Dimensions 282 x 187 x 75mm Weight 3 75 kg EMC Emissions EN55011 class B conducted amp radiated Harmonic Currents EN61000 3 2 class A Voltage Flicker EN61000 3 3 ESD Immunity EN61000 4 2 level 3 contact Perf Criteria A Radiated Immunity EN61000 4 3 level 3 Perf Criteria A EFT Burst EN61000 4 4 level 2 Perf Criteria A Surge EN61000 4 5 installation class 3 Perf Criteria A Conducted Immunity EN61000 4 6 level 3 Perf Criter
14. ia A Magnetic Field limit applies to PSU only Dips amp Interruptions Safety Conformance Cables Optical Fibre Length 20m DC Power Cable Length 10m EN61000 4 8 3 A m Perf Criteria A EN61000 4 11 30 10 ms 60 100 ms gt 95 5000 ms Perf Criteria A B B EN60601 1 Type B Equipment Class 1 Backlight trigger cable BNC to SMA 10m Mains power lead IEC USB cable Type A B length 1 5m Safety Warnings AGS The MRI scanner should only be used by suitable qualified personnel aware of the risks involved National regulations and guidelines should be followed Follow all safety instructions from the MRI scanner manufacturer Life support applications BOLDscreen should NOT be used in situations where failure of the device would constitute a hazard It is designed for visual stimulus of research applications only and like any other regular electronic device the display could fail at any time without warning Photo Sensitive Epilepsy Any system capable of creating flashing images can potentially induce photo sensitive epilepsy in susceptible individuals The confines of the MRI environment exacerbate the risk should a seizure occur Experiment design should take this risk into account httop www hardingfpa co uk resources photosensitive epilepsy pse Monitor The monitor poses no missile hazard in an MRI environment However any adjustments made to the mounting clamps should be
15. ld be routed via the waveguide port from the control room into the magnet room Make sure the lead is connected the right way round It has a transmitter and receiver end they are NOT interchangeable although the connectors are the same The transmitter end should be connected to the video source computer in the control room The receiver should be connected to BOLDscreen The jack screws must be done up once the cable has been installed this is particularly important at the BOLDscreen end to prevent interference The cable contains glass fibre optics and can be damaged by rough handling DO NOT KINK OR STAND ON THE FIBRE CABLE OR IT WILL BE DAMAGED The transmitter and receiver both have a blue LED which illuminates when powered The receiver is powered from BOLDscreen but the transmitter is powered by the computer s graphics card If the transmitter LED does not light up when the computer is switched on it is possible that the graphics card is not supplying sufficient power It is also important that the computer has a DVI connector analogue VGA HD15 connectors are not suitable as BOLDscreen requires a source of digital video The monitor will only be driven by 1920x1200 DVI at 60Hz With any other signal no picture will be seen If the video input does has the wrong resolution then the status screen displays the current frame rate and pixel clock applied to BOLDscreen They should be approximately 60Hz and 154MHZz respectively Th
16. s cards also implement temporal dithering for this purpose Stimulation general Avoid applying stimuli that continually swaps between two images on alternate video frames Such stimuli can cause the LCD cells to become polarised in one state which is detrimental to the life of the LCD panel It can also cause a flickering after image on BOLDscreen for some time after the alternate frame stimuli is removed The SDcard and mass storage drive For convenience BOLDscreen contains a removable SDcard that contains the files necessary for the device operation This can be removed from the monitor to enable changes to be performed without removing the screen from the magnet room Alternatively BOLDscreen can be removed from the magnet room and connected to a computer via the USB lead When the screen is switched on it will appear as another drive and files can be loaded on in the normal way It is suggested that users keep a backup of the contents of the SDcard in case the files accidentally get deleted Drivers subdirectory This contains the inf file needed by windows if the virtual serial port interface is used Documentation subdirectory Contains a pdf version of this manual The Firmware subdirectory Changes to BOLDscreen only take effect if the device is powered off then back on again If a firmware update is performed this may take about a minute before the screen illuminates again This is normal AND THE POWER SHOULD BE INTERRUPT
17. should be strong enough to resist forces on the monitor during a magnet quench Outer 4 holes are VESA 200 x 200mm M6 Connecting the PSU to BOLDScreen l AS y gt N lt N X Ta SS u SAN On Off Nit AN g N n JURY SA il 7 Nil X S Switch Fuses Mains Inlet The PSU connects to the filtered mains outlet in the MRI room via the mains lead provided The shielded DC supply cable connects from the PSU to the 15 pin DC connector in the side of BOLDScreen Since the cable ends contain ferrous materials the cables should not be left unconnected in the scanner room or some movement may be observed After attachment the cable should be clipped onto the stand to take the stress off the connector Make sure the PSU is switched off before connecting or removing the DC cable The on off switch is located on the side of the PSU next to the mains inlet When power is applied to BOLDscreen a self generated status display is generated If no display is produced check the power connections and that the memory card is inserted into the slot at the side of the monitor Connecting a Video Source to BOLDScreen A Video input DVI o a Backlight trigger The video source should be connected to BOLDScreen via the shielded fibre optic DVI cable provided Like the DC cable the fibre connectors contain ferrous materials and should NOT be left unconnected in the scanner room or some movement may be observed The cable shou
18. the video frame number time in seconds trigger input state actual current backlight luminance the luminance set value pulse width modulation setting and the LED anode voltage Typical response might be sbackliaght 10097 7160 433871 799 38007 25246 743 04 Sbacklight frame time trigger measured luminance set luminance PWM count LED voltage gt gt SStop Opposite to start gt gt SUSB_massStorage Disconnects the serial port and re enables the disk drive This command only takes effect until BOLDscreen is restarted again To make a permanent change edit the xml file again gt gt SProductType Returns the productType in the format SProductType BOLDscreen The following commands mimic information available on the status screen gt gt SSerialNumber This returns the 8 character serial number of the device in the following format SSerialNumber 12345678 gt gt SFirmwareDate This will return the date the current firmware was compiled SFirmwareDate DD MM YYYY hr min Technical Data System Environmental Conditions Indoor use only Operating Temperature 0 C to 30 C Cooling Convection cooled Operating or Storage Humidity up to 40 C 10 90 RH non condensing Storage Temperature 20 C to 60 C 40 RH Monitor Characteristics Screen size 24 diagonal active area 518 4mm x 324 0mm 0 270mm pixel pitch Screen resolution 1920 x 1200 pixels Note a small area about 16 x 16 pixels in t
Download Pdf Manuals
Related Search