Hi, With 9 degrees of freedom, you can define any position and orientation of the source / detector with the current parametrization. What you are showing is a different GantryAngle with a SourceOffset. It's not always obvious how these should be set but there is a simpler solution: provide the source position, detector position and coordinates of the two axes of the detector: http://www.openrtk.org/Doxygen/classrtk_1_1ThreeDCircularProjectionGeometry.html#a0fb1475ed76a28cde24fac85eae18e1e I hope it helps, Simon
On Wed, Jul 10, 2024 at 8:13 AM Nikolay Filatov <filatovn...@gmail.com> wrote: > Hello RTK users. I've got a question about geometry. I want to rotate the > detector for all orientations around itself and InPlaneAngle, > OutOfPlaneAngle perform two rotations, but GantryAngle is not exactly what > I need (https://imgur.com/a/kDpfk5G) > Thanks to geometry invariant I can specify this angle through source_x, > detector_x offset, but source_x affects InPlaneAngle and OutOfPlaneAngle. > IMHO one of the possible solutions is to change RTK geometry final matrix - > swap Mrotation and Mtranslation, so source_x shouldn't affect InPlaneAngle > and OutOfPlaneAngle. > > Here > rtkThreeDCircularProjectionGeometry.cxx > void rtk::ThreeDCircularProjectionGeometry::AddProjectionInRadians(...) > { > ... > matrix = this->GetProjectionTranslationMatrices().back().GetVnlMatrix() * > this->GetMagnificationMatrices().back().GetVnlMatrix() * > this->GetSourceTranslationMatrices().back().GetVnlMatrix(); > this->GetRotationMatrices().back().GetVnlMatrix(); > ---> > matrix = this->GetProjectionTranslationMatrices().back().GetVnlMatrix() * > this->GetMagnificationMatrices().back().GetVnlMatrix() * > this->GetRotationMatrices().back().GetVnlMatrix(); > this->GetSourceTranslationMatrices().back().GetVnlMatrix(); > ... > } > didn't give desired result. > > So, is it somehow possible to specify this angle along with InPlaneAngle, > OutOfPlaneAngle ? > _______________________________________________ > Rtk-users mailing list > rtk-us...@openrtk.org > https://www.creatis.insa-lyon.fr/mailman/listinfo/rtk-users >
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