[Insight-users] coordinate system

[WANG Chengjia]

Hello,

I'm now working on a machine learning based 3D image registration work. To
create the ground truth registration, I need to firstly using simple least
square method to calculate a transformation from the corresponding point
(I'm using RIRE datasets).

The same working flow in matlab and itk produced the same transformation
matrix, but different transformed volume! In matlab, it's well aligned
using the coordinates of control points given by RIRE dataset. But in ITK I
have to inverse and switch the translation parameters. Then I realized it's
because of the different coordinate system in itk and Matlab.

Can anyone tell me a method to convert transformation matrix calculated
from the common coordinate system into the ITK one?

Thank you very much!

Best,

-- 
Chengjia Wang
Phd Student,
University of Edinburgh
Clinical Research Imaging Center (CRIC)
Toshiba Medical Visualization Systems Europe, Ltd
Email: wangchengjia1986 at gmail.com
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