[Mristudio-users] Artefacts around brainstem

[Susumu Mori]

These artifacts are very common, caused by B0 susceptibility.
The way to reduce this artifact is;
> Use the smallest matrix size. Instead of 256mm/128points, use
224mm/112points or 192mm/96points. All give 2mm resolution. The smaller the
matrix size, the less distortion.
> Use parallel imaging (SENSE, GRAPPA, ASSET)
> 1.5T has less distortion. 7T is the worst.


On Fri, Aug 23, 2013 at 12:09 PM, Ajay Garg <drajaygarg at gmail.com> wrote:

> Dear All,
>
> I face 2 probelms in my DTI data acquired on philips 3T scanner (32
> dir, 2 averages, SENSE factor 2.5) using 32-channel head coils-
> 1. Artefacts around brainstem
> 2. Flattening on pons
>
> I am using TE value of minimum selected by scanner + 5ms i.e. around 80ms.
>
> Thanks for all support.
> Ajay
> AIIMS
>
> --
> Dr Ajay Garg
> Additional professor
> Department of Neuroradiology
> Neurosciences Centre
> All India Institute of Medical sciences (A.I.I.M.S)
> Ansari Nagar,
> New Delhi
> India- PIN  110029
>
> E-mail:
> ajaygarg1971 at yahoo.com
> drajaygarg at gmail.com
>
> Fax:  0091-11-26588641, 26588663
> _______________________________________________
> mristudio-users mailing list
> mristudio-users at mristudio.org
> http://lists.mristudio.org/mailman/listinfo/
> Unsubscribe, send a blank email to:
> mristudio-users-unsubscribe at mristudio.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.mristudio.org/pipermail/mristudio-users/attachments/20130829/fb64a9b4/attachment.html