[Insight-users] lost origin and direction information when writing image to dicom or analyze format

[Kent Williams]

The DICOM file writer definitely uses the origin/direction information 
from an image when it writes a file.  The Analyze file writer does this 
also, but the Analyze file format only really supports three 
orientations, which correspond to the direction cosines as follows

RIP  -- Analyze Coronal
| 1 | | 0 | | 0 |
| 0 | | 0 | |-1 |
| 0 | | 1 | | 0 |

RPI  -- Analyze Transverse
| 1 | | 0 | | 0 |
| 0 | |-1 | | 0 |
| 0 | | 0 | | 1 |

PIR  -- Analyze Sagittal
| 0 | | 0 | | 1 |
|-1 | | 0 | | 0 |
| 0 | | 1 | | 0 |

If you'd care to send me a test program illustrating the problem you're 
having, I could perhaps see what's going wrong.
Zhiyong Xie wrote:
> I have tried to output itkImage to dicom or analyze file. I noticed 
> that the origin and direction information
> are missing in the outputed image. anyone have same experience? how to 
> fix this problem?
>  
> Thanks
>  
> Sean
>