[Brains-users] segmentation2

[Christoph Christmann]

Dear Omer,

I took a look at your DICOM images. The T2 and PD images appear to be 
affected by small head movement and strong eye movement artifacts. 
There are examples how to rate the movement artifacts on the BRAINS 
programmers site. Have a look at

http://www.psychiatry.uiowa.edu/mhcrc/IPLpages/qa_main.htm

Movements artifacts are mainly avoided by

- carefully instructing the subject to lay down in a relaxed manner, 
to keep the eyes closed, to not move any part of the body during the 
measurement ,
- a perfect mounting of the subjects head (not to tight to avoid 
unpleasantness, relaxed position),
- keeping contact to the subject between the session,
- not to deliver music via headphones,
- and avoiding long sessions (if possible: split into small sessions)

T1 seems a bit diffuse. Since the symphony is - as all siemens 
devices in my humble opinion - a quite robust device, I guess you 
could improve your results by better "head mounting", a better SHIM, 
and maybe using a certain sequence or certain parameters (slice 
thickness etc). furthermore you could ask for the regular service 
date and meet the service - ask if he/she could have a look at the 
pics and ask for some advices to better the quality.

We are gathering our data even on a quite old device (vision). 
However, the data fulfill our quality requirements.

Best regards

Christoph

At Wednesday 28.06.2006 20:03, Omer Kitis wrote:
>Dear brains users,
>
>I've requested help to get good segmentation today. I added dicom images
>to same mail to get recommendations for our acquisition. To improve my gm
>and wm kappa values, what can I do? Please find 3 images (T1, T2 and PD)
>attached this mail.
>Thanks for all contributions
>
>Best regards
>
>
>Omer Kitis, MD
>Ege University, School of Medicine
>Neuroradiology Dept. Izmir, TURKEY
>
>*** eSafe scanned this email for malicious content ***
>*** IMPORTANT: Do not open attachments from unrecognized senders  ***
>
>_______________________________________________
>Brains-users mailing list
>Brains-users at www.psychiatry.uiowa.edu
>http://www.psychiatry.uiowa.edu/mailman/listinfo/brains-users

-- 
Christoph Christmann                  christoph.christmann at zi-mannheim.de
Psychologist, MEE                     Fon/Fax +49 621 1703 63 18/05
Central Institute of Mental Health    http://www.zi-mannheim.de
Department of Clinical                D-68159 Mannheim J5
and Cognitive Psychology                       

**********************************************************************************************
IMPORTANT: The contents of this email and any attachments are confidential. They are intended for the 
named recipient(s) only.
If you have received this email in error, please notify the system manager or the sender immediately and do 
not disclose the contents to anyone or make copies thereof.
*** eSafe scanned this email for viruses, vandals, and malicious content. ***
**********************************************************************************************