( apologies for the deliberate cross posting - I need to ensure all potential ynic-ers get this )
Further to my previous emails, and subsequent system testing, we propose to change the visual projection system in MRI over the Easter weekend.
As of Tuesday the 7th of April 2015, projection in MRI would be at both a higher resolution and at a different aspect ratio (moving to 'widescreen'). Crucially, this means that any visual stimuli you are currently using in MRI will look different in size on the screen as of the change-over.
I have attached a summary schematic of these changes.
All future projects should take these changes into account when designing visual stimuli but, obviously, this change has a particular impact on studies part-way through data collection.
The good news is that the solution is relatively simple: visual stimuli simply need to be rescaled by a factor of 1.8 (make them 1.8 x bigger) to achieve the same image size.
Actions:
1) Let me know ASAP if you have any concerns so that we can address them.
2) If you need help rescaling your images PLEASE contact us for help.
3) If you want to test your rescaled images, or test to see what size any future project's images will appear on the screen get in touch with us (we have a demo machine set up).
Rest assured that the 'old' projection system is not being binned, and thus, if absolutely necessary, a switch back to the 'old' system could me made.
We are here to help you through this transition, which we believe brings many benefits to our MRI visual display setup. Feel free to contact us with any queries.
( .. and look out for exciting news about automatic eye-tracking for all visual MRI experiments! .. )
Andre'
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Andre Gouws York Neuroimaging Centre University of York The Biocentre York Science Park Heslington YO10 5NY
Tel: +44 (0) 1904 435327 Fax: +44 (0) 1904 435356
