# Latest

**URL:** https://discourse.itk.org/latest.md?page=8

[Latest](https://discourse.itk.org/latest.md) · [Categories](https://discourse.itk.org/categories.md) · [Tags](https://discourse.itk.org/tags.md)

**Page:** 9

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## [3D CT image rotation and resampling problem](https://discourse.itk.org/t/3d-ct-image-rotation-and-resampling-problem/7298)

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**Author:** [@jjs](https://discourse.itk.org/u/jjs)\
**Replies:** 3\
**Last updated:** [November 4, 2024, 12:00am UTC](https://discourse.itk.org/t/3d-ct-image-rotation-and-resampling-problem/7298 "2024-11-04T00:00:17Z")

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Hello, I am new to ITK and try to apply a 3D rotation to CT image data. I have an object which is positioned with an angle in the CT. Therefore, I would like to apply a rotation, so that viewing the dataset wouldn’t “sh…

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## [HelloWorldITK on macOS Sequoia 15.0.1 cannot find stdio.h](https://discourse.itk.org/t/helloworlditk-on-macos-sequoia-15-0-1-cannot-find-stdio-h/7288)

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**Author:** [@Andy](https://discourse.itk.org/u/Andy)\
**Replies:** 4\
**Last updated:** [October 30, 2024, 8:22pm UTC](https://discourse.itk.org/t/helloworlditk-on-macos-sequoia-15-0-1-cannot-find-stdio-h/7288 "2024-10-30T20:22:20Z")

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On macOS 15.0.1, I’m building up to compiling the HelloWorldITK code by starting with the very basic HelloWorld that works just fine. CMakeLists.txt: cmake\_minimum\_required(VERSION 3.10) project(HelloWorld) add\_execut…

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## [Error happened at Release Mode of Forward1DFFTImageFilter](https://discourse.itk.org/t/error-happened-at-release-mode-of-forward1dfftimagefilter/7287)

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**Author:** [@SuperTXUH](https://discourse.itk.org/u/SuperTXUH)\
**Replies:** 2\
**Last updated:** [October 30, 2024, 4:22pm UTC](https://discourse.itk.org/t/error-happened-at-release-mode-of-forward1dfftimagefilter/7287 "2024-10-30T16:22:51Z")

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I have codes below which is running correctly under Debugmode using PixelType = float; constexpr unsigned int Dimension = 3; using ImageType = itk::Image\<PixelType, Dimension\>; using ComplexImageType = itk::Image\<comple…

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## [Running Pipeline Inputs/Outputs Tutorial in Browser](https://discourse.itk.org/t/running-pipeline-inputs-outputs-tutorial-in-browser/7282)

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**Author:** [@kgoettler](https://discourse.itk.org/u/kgoettler)\
**Replies:** 4\
**Last updated:** [October 29, 2024, 2:54pm UTC](https://discourse.itk.org/t/running-pipeline-inputs-outputs-tutorial-in-browser/7282 "2024-10-29T14:54:57Z")

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Hi all, I’ve been following the ITK-Wasm tutorials and would like to start using ITK-Wasm in some browser-based applications I’m building. As a first step, I’m attempting to compile and run the median filtering code fro…

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## [BSplineTransform not optimising in 2D-3D registration setting](https://discourse.itk.org/t/bsplinetransform-not-optimising-in-2d-3d-registration-setting/7241)

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**Author:** [@ljm898](https://discourse.itk.org/u/ljm898)\
**Replies:** 9\
**Last updated:** [October 23, 2024, 2:04pm UTC](https://discourse.itk.org/t/bsplinetransform-not-optimising-in-2d-3d-registration-setting/7241 "2024-10-23T14:04:06Z")

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Hi All, I’m working on implementing 2D-3D deformable registration in ITK (v5.3.0) using a BSplineTransform to fit deformable motion, but have hit a wall optimising a BSplineTransform. The approach I’ve taken is to compo…

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## [Example of loading images using itk-wasm?](https://discourse.itk.org/t/example-of-loading-images-using-itk-wasm/7275)

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**Author:** [@dstansby](https://discourse.itk.org/u/dstansby)\
**Replies:** 4\
**Last updated:** [October 22, 2024, 6:05pm UTC](https://discourse.itk.org/t/example-of-loading-images-using-itk-wasm/7275 "2024-10-22T18:05:42Z")

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I’m looking to render a 3D TIFF file using vtk.js, and I understand I can handle the reading of the images using itk-wasm, and then convert it to a VTK object. I’m struggling to understand from the itk-wasm API docs how …

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## [Limit Threads for the whole host for the execution of multiple ITK processes](https://discourse.itk.org/t/limit-threads-for-the-whole-host-for-the-execution-of-multiple-itk-processes/7276)

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**Author:** [@reox](https://discourse.itk.org/u/reox)\
**Replies:** 4\
**Last updated:** [October 22, 2024, 2:57pm UTC](https://discourse.itk.org/t/limit-threads-for-the-whole-host-for-the-execution-of-multiple-itk-processes/7276 "2024-10-22T14:57:42Z")

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I have a tool written in Python and SimpleITK and start multiple instances of it at the same time. I have limited the number of threads per process via the environment variable ITK\_GLOBAL\_DEFAULT\_NUMBER\_OF\_THREADS . How…

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## [2D skeletonization?](https://discourse.itk.org/t/2d-skeletonization/7268)

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**Author:** [@dzenanz](https://discourse.itk.org/u/dzenanz)\
**Replies:** 4\
**Last updated:** [October 21, 2024, 8:12pm UTC](https://discourse.itk.org/t/2d-skeletonization/7268 "2024-10-21T20:12:15Z")

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Are there any algorithms for medial surface implemented in ITK? The Thickness3D module only does 1D skeletonization, useful for vessels, airways, or maybe limbs. There is a CLI module in Slicer called ExtractSkeleton, l…

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## [How to synthesize the 2D image after each layer correction back into 3D？](https://discourse.itk.org/t/how-to-synthesize-the-2d-image-after-each-layer-correction-back-into-3d/7273)

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**Author:** [@Breeze-Zero](https://discourse.itk.org/u/Breeze-Zero)\
**Replies:** 2\
**Last updated:** [October 21, 2024, 2:01pm UTC](https://discourse.itk.org/t/how-to-synthesize-the-2d-image-after-each-layer-correction-back-into-3d/7273 "2024-10-21T14:01:19Z")

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I have a cardiac MRI motion correction code that splits the original 4D nii into multiple slices for correction, which is actually modifying the saved affine matrix, but this code saves the corrected results as separate …

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## [Index type ("ElementIdentifier") of \`itk::VectorContainer\` is now \`itk::SizeValueType\` by default, please check!](https://discourse.itk.org/t/index-type-elementidentifier-of-itk-vectorcontainer-is-now-itk-sizevaluetype-by-default-please-check/7263)

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**Author:** [@Niels\_Dekker](https://discourse.itk.org/u/Niels_Dekker)\
**Replies:** 1\
**Last updated:** [October 17, 2024, 2:14pm UTC](https://discourse.itk.org/t/index-type-elementidentifier-of-itk-vectorcontainer-is-now-itk-sizevaluetype-by-default-please-check/7263 "2024-10-17T14:14:52Z")

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From commit ENH: Make index type of VectorContainer SizeValueType by default · InsightSoftwareConsortium/ITK@4b5e5be · GitHub (merged to the “master” branch for ITK 6.0), it is no longer necessary to explicitly specify t…

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## [Maintenance downtime](https://discourse.itk.org/t/maintenance-downtime/7262)

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**Author:** [@dzenanz](https://discourse.itk.org/u/dzenanz)\
**Replies:** 0\
**Last updated:** [October 15, 2024, 4:43pm UTC](https://discourse.itk.org/t/maintenance-downtime/7262 "2024-10-15T16:43:17Z")

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We plan to perform maintenance on Kitware’s primary web server Thursday, October 17th, between 07:00 AM and 09:00 AM EDT. During this time, sites hosted on this server will experience intermittent downtime. This includes…

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## [ITK install halts](https://discourse.itk.org/t/itk-install-halts/7259)

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**Author:** [@Vicente\_Ferrer](https://discourse.itk.org/u/Vicente_Ferrer)\
**Replies:** 2\
**Last updated:** [October 15, 2024, 1:41pm UTC](https://discourse.itk.org/t/itk-install-halts/7259 "2024-10-15T13:41:26Z")

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Hello, While installing ITKR with devtools I have this error: Building CXX object Modules/Filtering/MathematicalMorphology/src/CMakeFiles/ITKMathematicalMorphology.dir/itkMathematicalMorphologyEnums.cxx.o In file inclu…

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## [how to perform CBCT 3D reconstruction given a squence of 2D .raw X-ray images and corresponding projection matrices](https://discourse.itk.org/t/how-to-perform-cbct-3d-reconstruction-given-a-squence-of-2d-raw-x-ray-images-and-corresponding-projection-matrices/7251)

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**Author:** [@zhangxiang](https://discourse.itk.org/u/zhangxiang)\
**Replies:** 10\
**Last updated:** [October 14, 2024, 1:01pm UTC](https://discourse.itk.org/t/how-to-perform-cbct-3d-reconstruction-given-a-squence-of-2d-raw-x-ray-images-and-corresponding-projection-matrices/7251 "2024-10-14T13:01:08Z")

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I want to do this work in The Reconstruction Toolkit, and I know how to use a .mha file to reconstruction. But i do not know how to store .raw image sequence into a .mha file(or multiple if possible) with correct origin…

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## [Same patient's dicom volumes has different dimensions, spacing and slices numbers](https://discourse.itk.org/t/same-patients-dicom-volumes-has-different-dimensions-spacing-and-slices-numbers/7256)

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**Author:** [@Deniz\_Ceylan](https://discourse.itk.org/u/Deniz_Ceylan)\
**Replies:** 1\
**Last updated:** [October 14, 2024, 12:52pm UTC](https://discourse.itk.org/t/same-patients-dicom-volumes-has-different-dimensions-spacing-and-slices-numbers/7256 "2024-10-14T12:52:03Z")

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Hi, I’ve looked for solutions here but i couldnt find. Sorry if it’s a duplication. I have 11 different DICOM volumes of same patient (converted to nifti) with absolutely different dimensions. I want to use caPTk for…

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## [Visual Studio 2022 - cannot build project](https://discourse.itk.org/t/visual-studio-2022-cannot-build-project/7252)

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**Author:** [@Knut](https://discourse.itk.org/u/Knut)\
**Replies:** 2\
**Last updated:** [October 10, 2024, 2:03pm UTC](https://discourse.itk.org/t/visual-studio-2022-cannot-build-project/7252 "2024-10-10T14:03:30Z")

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I try to compile InsightToolkit-5.4rc01 on Win10 with cmake and VisualStudio 2022. cmake error: CMake Error at Modules/ThirdParty/VNL/src/vxl/CMakeLists.txt:222 (message): You cannot have a + in your binary path CMak…

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## [Building ITK: Error With Algorithim Module](https://discourse.itk.org/t/building-itk-error-with-algorithim-module/5927)

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**Author:** [@ramen-newdals](https://discourse.itk.org/u/ramen-newdals)\
**Replies:** 22\
**Last updated:** [October 9, 2024, 2:06pm UTC](https://discourse.itk.org/t/building-itk-error-with-algorithim-module/5927 "2024-10-09T14:06:33Z")

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Hello ITK Community, I am attempting to rebuild the ITK project. I had a successful build on the same system before, but I am having problems with this rebuild (The previous build was completed with the VMTK super build…

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## [Apply 1D FFT along specified dimension (row or column) using SimpleITK is SLOW](https://discourse.itk.org/t/apply-1d-fft-along-specified-dimension-row-or-column-using-simpleitk-is-slow/7247)

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**Author:** [@SuperTXUH](https://discourse.itk.org/u/SuperTXUH)\
**Replies:** 10\
**Last updated:** [October 9, 2024, 1:47pm UTC](https://discourse.itk.org/t/apply-1d-fft-along-specified-dimension-row-or-column-using-simpleitk-is-slow/7247 "2024-10-09T13:47:57Z")

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Hello, I am using sitk::ForwardFFT in C++ to apply 1D FFT on each row or column on a 2D image. However, I found the processing speed is quite slow even using buffer operations. Is there any built-in function in SimpleI…

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## [Transform from (cone beam) projection to object plane/coordinates?](https://discourse.itk.org/t/transform-from-cone-beam-projection-to-object-plane-coordinates/7246)

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**Author:** [@constantine](https://discourse.itk.org/u/constantine)\
**Replies:** 5\
**Last updated:** [October 9, 2024, 1:24am UTC](https://discourse.itk.org/t/transform-from-cone-beam-projection-to-object-plane-coordinates/7246 "2024-10-09T01:24:12Z")

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Hello all, Would you be able to suggest the appropriate transform for this use case? Say, in videofluoroscopy an object is projected onto the sensor plane with a radial distortion pattern in this manner: While near…

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## [Why does an \`itk::PointSet\` have "PointData"? Any existing use cases?](https://discourse.itk.org/t/why-does-an-itk-pointset-have-pointdata-any-existing-use-cases/7235)

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**Author:** [@Niels\_Dekker](https://discourse.itk.org/u/Niels_Dekker)\
**Replies:** 9\
**Last updated:** [October 8, 2024, 7:15pm UTC](https://discourse.itk.org/t/why-does-an-itk-pointset-have-pointdata-any-existing-use-cases/7235 "2024-10-08T19:15:21Z")

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Obviously, itk::PointSet has a container of points (m\_PointsContainer), but it also may have some extra data, named “PointData”, and stored in its m\_PointDataContainer. As was introduced by @willschroeder, more than 2…

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## [creation of dicom with less size](https://discourse.itk.org/t/creation-of-dicom-with-less-size/6372)

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**Author:** [@George\_Z](https://discourse.itk.org/u/George_Z)\
**Replies:** 6\
**Last updated:** [August 1, 2024, 4:46pm UTC](https://discourse.itk.org/t/creation-of-dicom-with-less-size/6372 "2024-08-01T16:46:24Z")

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Hello, I am trying to reduce dicom file size when creating a new dicom by converting from bmp to png but I do not see the file size getting reduced, png use compession so logically I have less file size. Best Regards …

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## [Misaligned intensity volume and ground truth mask](https://discourse.itk.org/t/misaligned-intensity-volume-and-ground-truth-mask/7245)

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**Author:** [@Vojtech\_Benda](https://discourse.itk.org/u/Vojtech_Benda)\
**Replies:** 3\
**Last updated:** [October 2, 2024, 6:41pm UTC](https://discourse.itk.org/t/misaligned-intensity-volume-and-ground-truth-mask/7245 "2024-10-02T18:41:32Z")

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I’m trying to extract volume sizes of a liver and tumors from their ground truth volume masks. I’m using the LabelIntensityStatisticsImageFilter, but for one of the inputs it throws me an error: RuntimeError: Exception …

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## [itk::RelabelComponentImageFilter::GetSizeOfObjectInPhysicalUnits signature](https://discourse.itk.org/t/itk-getsizeofobjectinphysicalunits-signature/7237)

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**Author:** [@cg2](https://discourse.itk.org/u/cg2)\
**Replies:** 3\
**Last updated:** [October 1, 2024, 10:43pm UTC](https://discourse.itk.org/t/itk-getsizeofobjectinphysicalunits-signature/7237 "2024-10-01T22:43:51Z")

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Hi, After the detection of of a signedness comparison error during the compilation of RelabelComponentImageFilter: ITK-5.2/itkRelabelComponentImageFilter.h:228:24: error: comparison of integer expressions of different …

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## [about AddProjection(const HomogeneousProjectionMatrixType & pMat)](https://discourse.itk.org/t/about-addprojection-const-homogeneousprojectionmatrixtype-pmat/7232)

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**Author:** [@ma1282029525](https://discourse.itk.org/u/ma1282029525)\
**Replies:** 2\
**Last updated:** [September 24, 2024, 12:18pm UTC](https://discourse.itk.org/t/about-addprojection-const-homogeneousprojectionmatrixtype-pmat/7232 "2024-09-24T12:18:41Z")

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WARNING: In D:\\rtk\\RTK-2.4.1\\src\\rtkThreeDCircularProjectionGeometry.cxx, line 358 DataObject (000001DBC37F0C40): Failed to AddProjection What does this error mean?

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## [How to use FetchContent in CMakeList.txt to download/build SimpleITK and create example](https://discourse.itk.org/t/how-to-use-fetchcontent-in-cmakelist-txt-to-download-build-simpleitk-and-create-example/7231)

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**Author:** [@SuperTXUH](https://discourse.itk.org/u/SuperTXUH)\
**Replies:** 6\
**Last updated:** [September 23, 2024, 3:58pm UTC](https://discourse.itk.org/t/how-to-use-fetchcontent-in-cmakelist-txt-to-download-build-simpleitk-and-create-example/7231 "2024-09-23T15:58:08Z")

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I want to have an auto-configuration of SimpleITK and create the example project. Here is an example CMakeList.txt: cmake\_minimum\_required(VERSION 3.16.3) project(exampleSITK) set(BUILD\_TESTING OFF) set(BUILD\_EXAMPLES…

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## [Need help understanding codes from sitk notebook](https://discourse.itk.org/t/need-help-understanding-codes-from-sitk-notebook/7228)

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**Author:** [@Learner](https://discourse.itk.org/u/Learner)\
**Replies:** 1\
**Last updated:** [September 19, 2024, 5:56pm UTC](https://discourse.itk.org/t/need-help-understanding-codes-from-sitk-notebook/7228 "2024-09-19T17:56:02Z")

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I need help understanding some codes lines from sitk notebook (63\_Registration\_Initialization), link here. I will (1) show the codes that I am using, (2) then ask my specific questions. I have so many questions (I apolo…

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## [recover CC labeling from CC representatives in binary image](https://discourse.itk.org/t/recover-cc-labeling-from-cc-representatives-in-binary-image/7226)

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**Author:** [@cousin](https://discourse.itk.org/u/cousin)\
**Replies:** 3\
**Last updated:** [September 18, 2024, 5:57pm UTC](https://discourse.itk.org/t/recover-cc-labeling-from-cc-representatives-in-binary-image/7226 "2024-09-18T17:57:41Z")

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Dear all, I am considering the processing of a big binary image. A first processing step is to transform it into a second binary image, whose connected components I wish to retain. For lower disk usage and further para…

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## [Help regarding RTK geometric projection](https://discourse.itk.org/t/help-regarding-rtk-geometric-projection/7225)

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**Author:** [@ma1282029525](https://discourse.itk.org/u/ma1282029525)\
**Replies:** 4\
**Last updated:** [September 18, 2024, 3:40pm UTC](https://discourse.itk.org/t/help-regarding-rtk-geometric-projection/7225 "2024-09-18T15:40:58Z")

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I have calculated the projection matrix and verified the re-projection to confirm there are no issues. However, when I tried to add the calculated matrix using AddProjection, I encountered an error: WARNING: In D:\\rtk\\RT…

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## [Registry edit error during CMake config](https://discourse.itk.org/t/registry-edit-error-during-cmake-config/7206)

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**Author:** [@gregsharp](https://discourse.itk.org/u/gregsharp)\
**Replies:** 7\
**Last updated:** [September 16, 2024, 11:41pm UTC](https://discourse.itk.org/t/registry-edit-error-during-cmake-config/7206 "2024-09-16T23:41:10Z")

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Hi all, First, let me thank you for all the great software and support over the years! Latest CMake and ITK. I am trying to configure and build on a Corporate Windows 10 computer that has (IMO) fairly mild lockdown of …

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## [about rtk::ParkerShortScanImageFilter\<OutputImageType\>](https://discourse.itk.org/t/about-rtk-parkershortscanimagefilter-outputimagetype/7203)

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**Author:** [@ma1282029525](https://discourse.itk.org/u/ma1282029525)\
**Replies:** 2\
**Last updated:** [September 4, 2024, 10:05am UTC](https://discourse.itk.org/t/about-rtk-parkershortscanimagefilter-outputimagetype/7203 "2024-09-04T10:05:35Z")

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What is the purpose of the SetAngularGapThreshold method? Why does the reconstruction quality seem better when it is not set compared to when it is set?

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## [How to install ITK in windows](https://discourse.itk.org/t/how-to-install-itk-in-windows/2490)

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**Author:** [@banikr](https://discourse.itk.org/u/banikr)\
**Replies:** 12\
**Last updated:** [September 3, 2024, 6:23pm UTC](https://discourse.itk.org/t/how-to-install-itk-in-windows/2490 "2024-09-03T18:23:28Z")

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I am using VS2019 , CMake and ITK 5.01 But after ALL\_BUILD in VS2019 I am ending with the above errors.

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