[Mristudio-users] Question about map file operations

[Deepa Krishnaswamy]

Hi,
Thanks Durai, you are absolutely correct. It seems that using two ROIs
(first as AND, second as OR) is exactly the same as using the second ROI as
an OR.
Another question, if I am trying to implement something like (ROI1 OR ROI2
OR ROI3) AND (ROI4 OR ROI5 OR ROI6), how would this actually be done using
the map file? Of course I could do this by manually combining ROI1, 2 and 3
together, as well as 4,5 and 6, but I don't want to do that.
Thanks,

Deepa


On Mon, Apr 15, 2013 at 2:55 PM, Durai Arasan <durai23 at gmail.com> wrote:

>
>> If say I happen to put the first operation as AND, and the second
>> operation as OR, I still obtain a fiber bundle. I don't understand what
>> this actually means logically.
>>
>
> If the fiber bundle obtained is the same as that obtained if you just draw
> one OR roi, then it means the result of the first AND operation was a null
> roi. I think the logical ROI operations in DTI studio take a "null roi" as
> the default argument when a roi is not provided explicitly.
>
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