28 Nov 2006

More neuro-traumaimaging today: Dr. Gellella presented results from DTI imaging in minor head injury patients - one year post-injury. Even though these patients had very minor trauma, and no abnormalities on conventional imaging, FA changes were seen in the splenium of the corpus callosum and in the internal capsule, on a group level. Particularly interesting and promising, since I also acquire DTI data in my minor head injury patients; can’t wait to analyse!

I presented my first fMRI results of working memory related brain activation changes in minor head injury patients today. I am really happy with these first results, and fortunately the audience seemed interested too!

RSNA photos on Marion’s photos.

27 Nov 2006

McCormick conference center

Trauma-imaging again this morning: professor Alisa Gean (San Francisco) gave a very comprehensive overview of neuro-imaging of trauma. Very nice to hear that she’s using “the Rotterdam score”, developed by our own Neurosurgery department (Neurosurgery 2005;57:1173-82), for predicting mortality based on certain CT criteria on a routine basis.

More photos on Marion’s photos.

26 Nov 2006

First day at RSNA, and again, although it’s my 4th time here, overwhelmed by the scale of things…

I almost instantly walk into a large photo of one of my colleagues (Sandra van Tiel): she’s one of the molecular imaging awardees!

Sandra sandra-monique.jpg

Scientific session on neuroimaging in dementia was disappointing, with 2 speakers not having shown up and 1 further presentation not having been uploaded. The trauma-imaging session included a talk by dr. Rosenkrantz (Baltimore) on whole brain and regional DTI changes in correlation with GCS scores - interestingly, ADC changes in head injury patients compared to controls are seen throughout the brain, and don’t seem to be region-specific.

More photos on Marion’s photos.

23 Nov 2006

Fleur van Rootselaar succesfully defended her PhD thesis “Familial cortical myoclonic tremor with epilepsy” today - please note in the photo how we (Natasha and myself) supported her during this horrible grilling :-).

Natasha Fleur myself Fleur

17 Nov 2006

This year’s annual meeting of the Dutch Radiological Society was supposed to be “special” (the Society’s 105th anniversary) and it was therefore held at the fairytale amusement park De Efteling. I must admit, I wasn’t that keen… forced to enjoy myself and all that. But, actually, it was great: I hadn’t been to the park since I was a kid, and I was under its spell - again - straight away. Even the presentations seemed magical.

I presented “CT in head injury patients: the CHIP prediction rule for the use of CT in minor head injury” - the result of our multicenter study of the indications of CT in minor head injury.

And then, of course, there was the party…magical!

Fata Morgana by night Indra and myself

More photos at Marion’s photos.

15 Nov 2006

Only one more week to Fleur’s PhD defence (23 November). We’ve done our very best to find the best place to celebrate (with cake) in Amsterdam!

Fleur, Natasha, Marion

14 Nov 2006

This is how we set up our Lumina button response box with Presentation using the parallel port.


  • get an RJ45 to D25 connector (e.g. from Minitran)
  • connect pin 5 (green cable; trigger pulse) with pin no. 10 on parallel port
  • connect pin 8 (white/grey cable; ground) with pin no. 24 on parallel port

Use hyperterminal to configure the Lumina response box:

  • start hyperterminal
  • click cancel
  • File > Properties
  • connect using COM1
  • set:
    • baud rate = 9600
    • data bits = 8
    • stop bits = 1
    • flow control = none

Settings Lumina response box:

  • 9600 baud

Configure Presentation:

  1. In Presentation, select the Settings tab and then select Response on the left.
  2. Click the Parallel Port Device button: Presentation, Settings tab, Response
  3. On the Parallel Input Device dialogue box, enter the following settings. Parallel Input Device
  4. Click Close.
  5. Click the Serial Input Device button:
  6. On the Serial Input Device Settings dialogue box, enter the following settings. Serial Input Device Settings
  7. Click OK.
  8. Select Port on the left, and enter the following settings: Presentation, Settings tab, Port
31 Oct 2006

Not too happy with greyscale fMRI overlays?

Here’s how to easily highlight them in colour (using Adobe Photoshop):

  1. Duplicate the background layer
  2. Use the magic wand to select the areas of activation (hold down Shift for multiple selections; reduce the tolerance from 30 to 10 at the edges)
  3. Shift-Ctrl-I (inverse selection)
  4. Delete
  5. Shift-Ctrl-I (inverse selection again)
  6. Ctrl-L (output levels)
  7. Set output levels for Ctrl-1 (red) to 255/255 and Ctrl-3 (blue) to 0/0
  8. Ctrl-U saturation to -30
  9. Ctrl-Alt-D (feather) at 5 pixels
  10. Save

All set for a flash presentation!

23 Oct 2006


My little nephew Olaf - just one day old.

15 Oct 2006

dtV II.SR is one of the most commonly used fibre tracking tools for deterministic tractography, developed by Yoshitaka Masutani and implemented in Volume-One. It lets you import your DTI data in DICOM format, but you may encounter problems importing if:

  1. your DICOM files are in a folder that is not at the root level.
  2. dTV fails to create a temp folder. You can solve this by creating this folder (c:\temp) yourself.
  3. you are not using Windows XP. You will need to install Install .NET Framework ver 1.1 (available from Microsoft).

See also the dTV trouble shooting page.