[Mristudio-users] Image formats

[susumu]

Hi Shawn,

 

1) Why you don't read the Siemens DICOM directly to DtiStudio?

2) There is one thing you want to know when you are processing Siemens data.
When you are using a) oblique slices AND b) your operating system is older
than the latest one, then you have to re-calculate your gradient table based
on the oblique angle. This can be done by simply clicking the "rotate
gradient table if applicable" in the data parameter window in the beginning.
However, this works only when you are using DICOM. Once you convert it to
Analyze or Raw, the oblique information is removed and you can't use this
function.

3) If you get that message, that mean your image file size is not;

 

file size = X resolution x Y resolution x the number of slices x the number
of orientation + the number of b0.

 

You can read you DICOM and click the "hummer and scissors" button to check X
resolution, Y resolution, and the number of slices. You can also check the
pull-down menu to find how many 3D images are loaded. The number of 3D
images has to match your gradient table. In your case, 26 direction + 1 b0
should be 27 3D images. 

 

Use "MriView3D" to read the DICOM or Analyze and check all the dimensions
and the number of 3D images. 

 

  _____  

From: mristudio-users-bounces at mristudio.org
[mailto:mristudio-users-bounces at mristudio.org] On Behalf Of Shawn Newlander
Sent: Thursday, May 07, 2009 4:38 PM
To: Mristudio-users at mristudio.org
Subject: [Mristudio-users] Image formats

 

I have images in Siemens dicom mosaic format , which I saved in analyze
format in DTI studios to do the brain extraction.  In order to do DTI
mapping, I tried to import the raw images; however, I am getting this error:

"Number of files in this folder is less than expected
(Img_Slices*Img_Blocks)"

I have 35 slices for 26 gradient directions.  Is there a way to import this
images without having to break apart each volume?
   

 

Shawn
smnewlander at yahoo.com

 

 

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