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MR Driving license course Day 2 – Buttonology Stefan Skare MR-Centrum, KS.

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Presentation on theme: "MR Driving license course Day 2 – Buttonology Stefan Skare MR-Centrum, KS."— Presentation transcript:

1 MR Driving license course Day 2 – Buttonology Stefan Skare MR-Centrum, KS

2 Recommended literature These handouts  To be emailed to you Basics of MRI  ladybird:/usr/local/info/education/basics_of_mri.tar EPI  ladybird:/usr/local/info/education/EPI_APPS.PDF

3 Contents The scanner Overview of the interface Stepping through a few relevant pulse sequences Sending the exam away TPS reset, reboot

4 MR scanner specs MRC1  Strength 33 mT/m over 45 FOV  Speed (Slew rate) 120 T/m/s  8 RF channels MRC2  Zoom mode 40 mT/m over 35 FOV 150 T/m/s  Whole body mode 23 mT/m over 45 FOV 75 T/m/s  8 RF channels

5 Dock & undock the bed

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8 Align on Set landmark (define origin = [0,0,0]) Advance to scan (move table to the center of tunnel) Stop table Back to Landmark (hold 2 secs) Move table all the way out (hold 2 secs) Table in/out Fast or slow

9 Emergency buttons

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12 RF coils for head imaging Standard head coil 8 channel head coil “8HRBRAIN”

13 RF coils for head imaging Standard head coil 8 channel head coil “8HRBRAIN”

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15 Where to find the RF coils

16 fMRI equipment

17 Contents The scanner Overview of the interface Stepping through a few relevant pulse sequences Sending the exam away TPS reset, reboot

18 Choose the correct coil ! 3-plane Axial Sagittal Coronal Oblique Choose pulse sequence Select imaging options MRC2 ONLY ! Choose gradient mode (Whole or Zoom) Always Zoom for EPI Select 2D, unless 3D- SPGR

19 Contents The scanner Overview of the interface Stepping through a few relevant pulse sequences Sending the exam away TPS reset, reboot

20 Pulse sequences Localizer 3D SPGR GE-EPI (fMRI) DW-EPI

21 Localizer 0.0 1 Select iso-center 1 slice per axis Select FOV of 25-30 cm Slice thickness e.g. 5 mm Press Save Series Press Prepare to Scan (not necessary for first series) Press Scan Localizer

22 q3dgrass2 3D-SPGR

23 GE-EPI First prep for scan if manual sync with paradigm

24 Image allocation 1024 images / scan  # slices x # volumes < 1024  That’s why we use Brainwave (20,000 images) For diffusion tensor imaging there is also need for > 1024 images  E.g. 50 slices x 55 diffusion directions  3,000 images  We’ve now have a solution to run DTI via Brainwave (not product)

25 DW-EPI > 1024 images Choose #RR = #slices/2 or maybe “/3” (Depending on heart rate) # diffusion directions

26 Contents The scanner Overview of the interface Stepping through a few relevant pulse sequences Sending the exam away TPS reset, reboot

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28 Contents The scanner Overview of the interface Stepping through a few relevant pulse sequences Sending the exam away TPS reset, reboot

29 Symptoms & Solutions MR system hangs  Step1 - Hope that TPS reset works Takes about 2 minutes You’ll need to make a “New Patient” afterwards. Type “mr” instead of patient ID to pick up the last exam. No new landmark is required. New Localizer is however necessary.

30 Symptoms & Solutions MR system hangs  Step 2 - Reboot Open a terminal window andtype “reboot”  Step 3 – Hardware shutdown Instead of “reboot”, type “poweroff” When system is down, go in to the system cabinet in computer room and switch off and on  OFF: 12, 11, 10…1  ON: 1,2…12 If you forget to “poweroff” before doing this, I’ll personally kill you with a spoon

31 1 2

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33 This position is “ON”


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