University of Oregon

Personal tools

Mock Scanner

Our mock scanner is designed to provide participants an experience similar to what they will experience in the real scanner. It has a moving table, a realistic head coil, visual and audio stimulus capabilities and a set of button boxes for participant response. There is also a TR pulse simulator so you can trigger your stimulus programs just like the scanner would. Scheduling for the simulator is available in Calpendo.

Mock ScannerMock Scanner - Red arrow indicates location of the controls for moving the table.

Operation of the simulator table is done with a simple two-switch system, one to turn on the system, the other to move the table in and out. The location of these controls is indicated by the red arrow on the picture of the mock scanner, above.Table ControlsTable Controls - Power switch is on the left, in-out switch is on the right.

The table will automatically stop moving when it has reached the limits of its travel.

Visual stimuli are provided by an LG projector connected to a StarTech KVM switch. The switch is connected to the resident stimulus presentation computer, Simulatum, on port two. Port one is available for your own presentation device.

Projector and Controllers

Visual Stimulus - Provided by a small projector, switchable between two different video sources.

The switch controls the source video signal (DVI) delivered to the projector as well as the computer that receives the USB signal from the Psychology Software Tools button box system. Controller Stack

Controller Stack - Audio amplifier is on top. The StarTech KVM switch switches between two different video sources. The Psychology Software Tools button box controller is on the bottom.

Audio simulating magnet noise is delivered by either the iMac or your own computer. The audio cable is labeled and can be move to the computer of your choice. An Optimus SA-155 power amplifier drives the simulator's built-in speaker system.

It is important that your stimulus programs respond properly to the trigger pulse sent by the scanner. To test this, you can use our pulse simulator, a small black box located next to the projector. The green light indicates a powered on condition. Press the button indicated by the red arrow to generate the pulse.

TR Pulse Simulator

TR Pulse Simulator - Red arrow indicates the button used to generate a pulse.

Simulatum, simulator iMac

This machine is set up to present stimuli to participants in the mock scanner. It can boot into Ubuntu Linux, OS X Yosemite and Windows 8.1, and is managed by rEFInd. Upon booting up, the machine will display the rEFInd menu of icons for each of the choices available.

Use the arrow keys of the keyboard to make your selection.

Simulatum Start-up Screen

rEFInd Start-up Screen - Icons for OS X, Ubuntu Linux and Windows 8.1. Note the fourth icon, on the right, which may appear if there is some USB  device connected.

The Windows and Linux sides are connected to the LCNI domain, so you can use your LCNI credentials to log onto the machine. This provides easy access to your home directory on our file server Bordeaux.

As of this writing, OS X does not yet support logging in with a network account. You may log in with a local account, localuser. Password is usecni2002.

Current limitations of the software installed (see below) include the lack of E-Prime Runtime on the Windows side and reported video timing issues with PsychToolbox on the OS X side. Currently, neither of these issues has a clear solution.

When you are done using the machine, we recommend either logging out of your session or rebooting the machine.

Software installed is as follows. Additional software may be installed upon request.

Software installations, Ubuntu Linux 14.04

  • Firefox
  • Chrome
  • MATLAB
  • Octave
  • PsychToolbox (ptb3-matlab)
  • Psychopy
  • Subversion
  • printer, HP LaserJet 8150

Software installations, Windows 8.1

  • Firefox
  • Chrome
  • MATLAB
  • Subversion
  • PsychToolbox
  • Presentation
  • E-Prime Runtime
  • McAfee
  • Spybot Search & Destroy
  • LibreOffice
  • Filezilla
  • ssh, KiTTY
  • xming
  • PsychoPy2
  • Notepad++
  • printer, HP LaserJet 8150

Software installations, OS X

  • Firefox
  • Chrome
  • MATLAB
  • PsychToolbox
  • XQuartz
  • Filezilla
  • PsychoPy2
  • Subversion
  • LibreOffice
  • printer, HP LaserJet 8150