[Rtk-users] Rtk-users Digest, Vol 129, Issue 6

[Simon Rit]

Please read the ITK documentation defining origin, spacing and direction:
https://itk.org/ITKSoftwareGuide/html/Book1/ITKSoftwareGuide-Book1ch4.html#x45-500004.1
You probably want to update the origin when you change the direction
indeed. Spacing should not be changed.

On Thu, Oct 26, 2023 at 10:18 AM 小哈 <2310447681 at qq.com> wrote:

> hello，
> Thank you for your answer.
>  I would like to know the meaning of the direction parameter matrix, or
> how should I set it?  If my other parameters, such as spacing and origin,
> need to be modified after setting the new direction matrix. Thank you.
>
>
> ------------------ Original ------------------
> *From:* "rtk-users" <rtk-users-request at creatis.insa-lyon.fr>;
> *Date:* Thu, Oct 26, 2023 10:58 AM
> *To:* "rtk-users"<rtk-users at creatis.insa-lyon.fr>;
> *Subject:* Rtk-users Digest, Vol 129, Issue 6
>
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> Today's Topics:
>
>    1. Reconstruction of CBCT using FDK algorithm
>       (=?gb18030?B?0KG5/g==?=)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 26 Oct 2023 10:42:24 +0800
> From: "=?gb18030?B?0KG5/g==?=" <2310447681 at qq.com>
> To: "=?gb18030?B?cnRrLXVzZXJz?=" <rtk-users at creatis.insa-lyon.fr>
> Subject: [Rtk-users] Reconstruction of CBCT using FDK algorithm
> Message-ID: <tencent_91E92C870E98F19F54C791653A1F3BCDAB0A at qq.com>
> Content-Type: text/plain; charset="gb18030"
>
> Hello,
>  In the image reconstructed using the FDK algorithm of the RTK
> package, the cross-sectional and coronal images were rotated
> counterclockwise by 90 degrees, as shown in the following figure.
> May I know how to modify the command line to reconstruct the image in the
> normal direction? Looking forward to your reply, thank you!
>
>
>
> BR
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