HI, Mark,
Thanks for your kind reply. Can I use fslmaths as well to generate a mask
file? That is, if the intensity value is in within a range [a, b], the
output is 1, otherwise the output is 0.
Best,
Defeng
----- Original Message -----
From: "Mark Jenkinson" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, October 18, 2007 2:58 PM
Subject: Re: [FSL] about morphology operations
> Yes - fslmaths will do all of these.
> You choose an appropriate kernel (2D, 3D, cube, sphere, etc) and
> then select the appropriate filtering operation (including dilation and
> erosion). Opening and closing are done just by doing combinations
> of dilation and erosion.
>
> All the best,
> Mark
>
>
> On 18 Oct 2007, at 07:39, Defeng WANG wrote:
>
>> Hi, FSLers,
>>
>> Is there any command in FSL that can perform morphology operations,
>> such as dilation, erosion, opening, and closing?
>>
>> Thanks.
>> Defeng
>> ----- Original Message ----- From: "Kelly" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Thursday, October 18, 2007 1:05 AM
>> Subject: [FSL] design file question
>>
>>
>>> Hi FSLrs:
>>>
>>> I have a question about the correct set up for a design.mat and
>>> design.con file.
>>>
>>> I am trying to set up a design that will compare two pre_post
>>> conditions; one with a drug and one without. So, I have four groups:
>>>
>>> drug_pre
>>> drug_post
>>> placebo_pre
>>> placebo_post
>>>
>>> Thus, I would like to compare - all within the same design so as to
>>> collapse variances and possibly increase power:
>>>
>>> drug pre versus drug post
>>> placebo pre versus placebo post
>>> drug pre versus placebo pre
>>> drug post versus placebo post
>>>
>>> What would my design files look like? I know what they should look
>>> like individually for a paired test and for an unpaired test...but this
>>> combination has thrown me for a loop. Help!
>>>
>>>
>>> Also for an unequal number of subjects in drug and placebo group do I
>>> need to reduce this so that there is an equal number of subjects for
>>> both or can this design be done with unequal numbers?
>>> Thanks so much.
>>>
>>> Kelly Brown
>>> UCHSC Research Assistant
>>> _____________________________________________________________
>>> Discount Online Trading - Click Now!
>>> http://thirdpartyoffers.juno.com/TGL2111/fc/
>>> Ioyw6iiejgS3jI6fJs37sf0bUKT9fZG8KRVDgPKSDyfjbIbNQKKDNT/
|