[Insight-users] Image registration - 2 different initializations

[Luis Ibanez]

Hi Radhika,

I didn't understand your question.

According to your email, you are doing
registration between two 2D images.

When you read the images from DICOM format
you get one registration result.

and if you convert the DICOM to raw and
then to Analyze format...

    then you get the *same* result.


Why is this a bad thing ?



   Luis



------------------------------------

Radhika Sivaramakrishna wrote:

> Hi Luis,
> 
> I appear to be having a strange problem with image registration. 
> Basically I am using the same code which you finally sent me although I have
> 
> combined the previous code you sent me to read a dicom series so as to 
> directly read a pair of test-retest DICOM series. Since the data are 
> unsigned short
> 
> there is already some problem I am having, I suspect w.r.t to Endianness 
> which I have not solved. But I am getting some other strange things which
> 
> I will try to describe below:
> 
>  
> 
> When I directly run the registration code on the 2 dicom series, then I get
> 
>  
> 
> Transform center before Initializer 0  0  0
> 
>  Transform center after Initializer -2.34973  225.964  219.384
> 
> Intial Parameters =
> 
> [0, 0, 0, -0.0650073, 1.4008, -2.19123]
> 
>  Translationscale   = 1000
> 
>  
> 
> However, when I save the images as Raw format and then convert that to 
> an Analyze file using ImageJ and then load in the two images again, 
> using the straight version
> 
> of the code you sent me, here is what I get:
> 
>  
> 
> Transform center before Initializer 0  0  0
> 
>  Transform center after Initializer -2.34973  225.964  219.384
> 
> Intial Parameters =
> 
> [0, 0, 0, -0.0650073, 1.4008, -2.19123]
> 
>  Translationscale   = 1000
> 
>  
> 
> I cant figure out what is going on. It appears the data is being read 
> fine, because the raw files for fixed and moving image are as they 
> should be when I view it on ImageJ.
> 
>  
> 
> Can you help figure out what is happening.
> 
>  
> 
> Thanks
> 
> Radhika
> 
>  
> 
> -----------------------------------------------------
> 
> Confidentiality Notice.
> 
> This email message is for the sole use of the intended recipient(s) and 
> may contain confidential and privileged information. Any unauthorized 
> review, use, disclosure or distribution is prohibited. If you are not 
> the intended recipient, please contact the sender by reply email and 
> destroy all copies of the original message. If you are the intended 
> recipient, please be advised that the content of this message is subject 
> to access, review and disclosure by the sender's Email System Administrator.
>