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MR Driving license course Day 2 Buttonology Stefan Skare MR-Centrum, KS Slide 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 Slide 3 Contents The scanner Overview of the interface Stepping through a few relevant pulse sequences Sending the exam away TPS reset, reboot Slide 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 Slide 5 Dock & undock the bed Slide 6 Slide 7 Slide 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 Slide 9 Emergency buttons Slide 10 Slide 11 Slide 12 RF coils for head imaging Standard head coil 8 channel head coil 8HRBRAIN Slide 13 RF coils for head imaging Standard head coil 8 channel head coil 8HRBRAIN Slide 14 Slide 15 Where to find the RF coils Slide 16 fMRI equipment Slide 17 Contents The scanner Overview of the interface Stepping through a few relevant pulse sequences Sending the exam away TPS reset, reboot Slide 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 Slide 19 Contents The scanner Overview of the interface Stepping through a few relevant pulse sequences Sending the exam away TPS reset, reboot Slide 20 Pulse sequences Localizer 3D SPGR GE-EPI (fMRI) DW-EPI Slide 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 Slide 22 q3dgrass2 3D-SPGR Slide 23 GE-EPI First prep for scan if manual sync with paradigm Slide 24 Image allocation 1024 images / scan # slices x # volumes < 1024 Thats 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 Weve now have a solution to run DTI via Brainwave (not product) Slide 25 DW-EPI > 1024 images Choose #RR = #slices/2 or maybe /3 (Depending on heart rate) # diffusion directions Slide 26 Contents The scanner Overview of the interface Stepping through a few relevant pulse sequences Sending the exam away TPS reset, reboot Slide 27 Slide 28 Contents The scanner Overview of the interface Stepping through a few relevant pulse sequences Sending the exam away TPS reset, reboot Slide 29 Symptoms & Solutions MR system hangs Step1 - Hope that TPS reset works Takes about 2 minutes Youll 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. Slide 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, 101 ON: 1,212 If you forget to poweroff before doing this, Ill personally kill you with a spoon Slide 31 1 2 Slide 32 Slide 33 This position is ON