[Mristudio-users] image quality flags

[Jerry Yeou-Wei Chen]

Hi Sarah,
I'm not sure if I understand your question correctly.... but my
understanding is that this is the typical order of operations in using the
flag file:
1) create the flag file: when loading a DTI series, you type in the name
(and path) of the file you wish to create in the textbox under the "Image
Quality Flag File (Optional)" section of the "DW-Image Parameters" window
(e.g. F:\data\myflagfile.flg)
2) fill in the rest of the window to load your DTI series
3) calculate Mean, STD ...
4) display Original - ADC - Mean - STD
5) flag the bad slices
at this point, you can re-calculate the Mean, STD ... and it will take into
account the flags
when you close the window, you'll be asked it you want to save the flg file
- say yes
next time when you open the series, load the flg file you saved, and you can
re-calculate the Mean, STD ...

Hope that helps,

- Jerry


Slide 2 –Calculate Mean, STD …
–Display Original – ADC – Mean - STD
–Filter out bad scans


On Mon, Mar 30, 2009 at 2:20 PM, Copeland, Sarah A. <
SCopeland at mednet.ucla.edu> wrote:

> Hello,
>
> I have a question about how to use the image quality flag feature in DTI
> studio. First, when you view the original images and choose the flagged
> ones, is there a particular button or appropriate way to save the .flg file,
> or do you just save it using the "save" icon and create a file with the .flg
> extension?
>
> Second, since the ability to view and flag the images isn't there until
> after you run DTI mapping, should you save the flag file and then re-run DTI
> mapping so that you can check the box which incorporates the information
> from the .flg file?
>
> Thanks for your help.
>
> Sarah Copeland
>
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