[Insight-users] conversion of scan transofmration matrix between different modality

[Bill Lorensen]

Calvin,

As I said, the orientation difference should be taken care of during the
registration process. Is the data being read as DICOM? If not, how are you
reading it?

Please ->Print(std::cout) the fixed and moving images after you read them
and post the results of the Print.

Bill

On Thu, Oct 1, 2009 at 8:31 AM, kevin cavin <beibeiwen2003 at yahoo.com> wrote:

> Hello, Bill :
>
>      Thanks for  your reply.  What I hve found with the orginal volume is
> the orientation for CT and MRI scan is different. If I directly register
> these  two volume, I will get wrong registration result.  I assume the
> transformtion of orientation for one scan is necessary. but how can I do
> that with available ITK ?
>      I am using ITK version 3.12.
>
> Kind regards
>
> Calvin
>
>
> --- On *Wed, 9/30/09, Bill Lorensen <bill.lorensen at gmail.com>* wrote:
>
>
> From: Bill Lorensen <bill.lorensen at gmail.com>
> Subject: Re: [Insight-users] conversion of scan transofmration matrix
> between different modality
> To: "kevin cavin" <beibeiwen2003 at yahoo.com>
> Cc: insight-users at itk.org
> Date: Wednesday, September 30, 2009, 11:36 PM
>
>
> ITK should handle this. ITK uses the information stored in DICOM to compute
> an origin, spacing and direction. You should not have to convert the volume,
> assuming the patient scans are landmarked (in the scanner) at a similar
> location.
>
> What version of ITK are you using?
>
> On Wed, Sep 30, 2009 at 11:04 AM, kevin cavin <beibeiwen2003 at yahoo.com<http://us.mc1120.mail.yahoo.com/mc/compose?to=beibeiwen2003@yahoo.com>
> > wrote:
>
>>
>> Hi, Folks:
>>
>>       When I use ITK to register two dicom volume  from different
>> modalities.  I have found that MR and CT scan often have different scan
>> transformation matrixes. For example for CT scan the z direction is the y
>> direction of MR scan. This will pose problem to register the two volumes
>> with ITK. I am wondering whether in ITK the probelm can be solved soneway by
>> using some function embedded. Do I need to write individual program to
>> manula convert one of the volume.  Thanks in advance !
>>
>> Kind regards
>>
>> Calvin
>>
>>
>>
>>
>>
>>
>>
>>
>>
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