KGS Lab Manual

Anne: pager 3-8222; # 15689

Preparations

Before you start, you should make sure:

1. The subject has completed a consent form .
2. You know which protocols you are going to use.
3. There is free disk space to store your data on lab computers.
4. You have stimulus code/machine present and ready.

Consent forms:

• Subject should sign 2 copies of the consent form. One goes to the subject and one stays in the lab. (These are kept in the filing cabinet in room 457 when you get back to Jordan.)
• Subject has to fill the yellow form in the scanner. All the answers to medical questions should be .no. to be able to scan
• Subject have normal or corrected-to-normal vision. If the subject would normally require correction, they have two options: 1) They can wear contacts or 2) They can use the set of magnet-compatible lenses stored in the black binder in the rear of the control room. These have a plastic frame (in the middle of the binder), and a set of L/R lenses -- all in integer # of diopters, so some subjects may need to round off. The glasses may be better if the subject worries about eyes drying out while using contacts (which will be exacerbated if the fan is kept on).
  • Put clean sheets on the scanner table and on coil .pillow.
  • Subjects should go to the restroom before the scan.
  • Subjects should take off the shoes. There are small slippers if the subject doesn't have socks.
  • All subjects must wear ear plugs. There are new 37 dB protection ear plugs on the top left shelf at the 3T.
  • Check carefully that subjects do not have anything metallic items on them such as jewelry, coins, piercing, knives, credit cards, etc. before they enter the scanner room
  • Keep the scanner door closed at all times.

Stimulus Setup

1. Connect the button box (large black box, usually near projector switches) to the usb port (It may sometimes be near Ochre3, the Heeger/Wandell lab G3 on the side; but this is rarely used as of 02/04)
2. Check that the button box is operating before you landmark the subject. Note that the keys stick sometimes, and sometimes matlab has problems getting the USB input. Test out the inputs while running matlab before continuing. Serial port
3. Connect keyspan device to USB port of the computer
4. Connect the serial connection (labeled "scan trig", located by the audio box) to the number 1 keyspan port Visual Display:
5. Connect the laptop to the video in of the vga splitter
6. The monitor connects to video out 2 of the vga splitter (this is ususally permanently connected)
7. Connect the lcd projector to video out 1 of the vga splitter
8. Switch the dial to select the projector source to the laptop position
9. After you landmark the subject and put him in the correct position in the scanner run in matlab:

mm_demo

Check that the stimulus is centered & focused - Check that the subject can:

• See all the display area
• Read the text
• See the fixation

Starting the Scan

• Enter scanner mode: click scanner icon in upper-left corner of display
• If exam is in progress, select End Exam in Rx Manager and Confirm.
• Click New Patient.
• In Patient Position area:
  • Patient ID: K. GrillSpector xxx (xxx are your initials).
  • Patient Name: subject's full name .
  • Weight: subject's weight.
  • Exam description: brain dob mm/dd/yyyy (date of subject's date of birth)

Protocol Selection (schematic representation of human body)

• Protocol set to Site (not GE).
• Click the head of the body schematic (protocols will appear).
• Select appropriate protocol (make sure it has the right coil selected)
• Click the head of the body schematic (protocols will appear).
• Accept.

Put subject in scanner (make sure subject has earplugs)

• Landmark subject.
• Clean out P-files from scanner controls computer before funning functionals:
• Go to tools (icon, upper-left)
• Open c-shell (button, lower-right of tools)

>> cd /usr/g/mrraw
>> rm P*
>> rm E*

Last modified 2004-Mar-1 05:28 GMT.