[Insight-users] Inter-slice Movement Correction

[Don Bigler]

Luis,
    Thank you for the response.  I've posted the two slices at 
ftp://cnmrr.hmc.psu.edu/movement
The directory also contains a png file demonstrating the misalignment 
along the central fissure in the coronal plane.
Don Bigler

Luis Ibanez wrote:
>
> Hi Don,
>
> Form your verbal description it is hard to picture what kind of
> misregistration is happening between the slices.
>
> Could you post somewhere in the web the two slices that you are
> trying to register ?
>
> Taking a look at the images will help us to figure out what kind
> of registration components you may need to combine here.
>
>
>   Thanks
>
>
>      Luis
>
>
>
> -----------------
> Don Bigler wrote:
>> ITK-Users,
>>    I am attempting to fix an interesting MRI artifact that occurs 
>> during long acquisitions.  The scanner uses multiple packages to 
>> acquire the entire head image and if the patient moves at all during 
>> the scan an inter-slice misregistration occurs.  Affine normalization 
>> of the image to a template does not fix the artifact.  I attempted to 
>> fix the problem by performing a 2D rigid body registration from one 
>> slice to the next using the ImageRegistration5.cxx example as a 
>> guide.  It uses the CenteredRigid2DTransform, 
>> MeanSquaresImageToImageMetric, and LinearInterpolateImageFunction.  I 
>> successfully modified the code to run from one slice to the next 
>> using a 3D volume as input, however it did not fix the problem.  Here 
>> are my questions:
>>
>> 1. Would the approach work better using another metric?
>> 2. Is there a better approach to solving this problem?
>>
>> Thank you for your time.
>> Don Bigler
>>
>
>

-- 
Don Bigler
The Pennsylvania State University
NMR Building
H066 Radiology
Hershey Medical Center
Hershey, PA 17033 
Phone: (717)531-5858
Fax: (717)531-8486

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