# Latest

**URL:** https://discourse.itk.org/latest.md?page=87

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

**Page:** 88

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## [Adding parallel compression to MetaIO](https://discourse.itk.org/t/adding-parallel-compression-to-metaio/1835)

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**Author:** [@dzenanz](https://discourse.itk.org/u/dzenanz)\
**Replies:** 14\
**Last updated:** [May 8, 2019, 8:55pm UTC](https://discourse.itk.org/t/adding-parallel-compression-to-metaio/1835 "2019-05-08T20:55:34Z")

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As discussed earlier, I want to add parallel compression to MetaIO and NRRD. As NRRD is bundled with other stuff and ITK’s version is not up to date, I plan to work on MetaIO first. I checked PIGZ, Mark Adler’s tool for…

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## [How to disable particular default module](https://discourse.itk.org/t/how-to-disable-particular-default-module/1840)

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**Author:** [@mihail.isakov](https://discourse.itk.org/u/mihail.isakov)\
**Replies:** 7\
**Last updated:** [May 8, 2019, 1:35pm UTC](https://discourse.itk.org/t/how-to-disable-particular-default-module/1840 "2019-05-08T13:35:44Z")

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Hello, I would like disable some default modules, specially GDCM / GDCMIO, in my application i use own stuff for DICOM and also GDCM-clone library, so i don’t need the module. Is it possible with some command line argu…

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## [Module test with arguments](https://discourse.itk.org/t/module-test-with-arguments/1740)

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**Author:** [@Gordian](https://discourse.itk.org/u/Gordian)\
**Replies:** 2\
**Last updated:** [May 8, 2019, 8:40am UTC](https://discourse.itk.org/t/module-test-with-arguments/1740 "2019-05-08T08:40:38Z")

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Hello, I wonder how to add arguments to test cases for different purposes. Not just data but other flags or arguments. After inspection of some ITK test files and the related CMakeLists.txt my guess is that i just need …

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## [Patients ID in DICOM in the USA](https://discourse.itk.org/t/patients-id-in-dicom-in-the-usa/1843)

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**Author:** [@hadasara](https://discourse.itk.org/u/hadasara)\
**Replies:** 2\
**Last updated:** [May 6, 2019, 10:47pm UTC](https://discourse.itk.org/t/patients-id-in-dicom-in-the-usa/1843 "2019-05-06T22:47:17Z")

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Hi all, As a non-USA citizen I was wondering what is wriiten as a patient ID in the DICOM tags. Is it passport number? Is it internal ID of hospital system? Is it something else? Thanks!

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## [Possibly incorrect files / file placement in install directory](https://discourse.itk.org/t/possibly-incorrect-files-file-placement-in-install-directory/1794)

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**Author:** [@seanm](https://discourse.itk.org/u/seanm)\
**Replies:** 2\
**Last updated:** [May 6, 2019, 10:12pm UTC](https://discourse.itk.org/t/possibly-incorrect-files-file-placement-in-install-directory/1794 "2019-05-06T22:12:28Z")

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Hi all, With bug #424 fixed (thanks!), I’ve been able to build ITK master for the first time in months. I noticed a few weird things after installing it: the root of the install folder contains a file “vcl\_compiler\_…

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## [SimpleITK Changing Git Workflow](https://discourse.itk.org/t/simpleitk-changing-git-workflow/1828)

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**Author:** [@blowekamp](https://discourse.itk.org/u/blowekamp)\
**Replies:** 2\
**Last updated:** [May 6, 2019, 2:36pm UTC](https://discourse.itk.org/t/simpleitk-changing-git-workflow/1828 "2019-05-06T14:36:16Z")

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Hello! We are in the processes of changing the SimpleITK development workflow to use the a full Github workflow, with the merge button. Please pardon our dust and delays in merging as we update the services, configurati…

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## [How does itkGeodesicActiveContourLevelSetImageFilter manage memory?](https://discourse.itk.org/t/how-does-itkgeodesicactivecontourlevelsetimagefilter-manage-memory/1838)

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**Author:** [@Riccardo\_Ballarini](https://discourse.itk.org/u/Riccardo_Ballarini)\
**Replies:** 1\
**Last updated:** [May 6, 2019, 12:42pm UTC](https://discourse.itk.org/t/how-does-itkgeodesicactivecontourlevelsetimagefilter-manage-memory/1838 "2019-05-06T12:42:34Z")

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Hi, I tried to use this level set, but it doesn’t run cause to “failed to allocate memory”. I made many tried and I have a question about this filter: if I made 100 iterations, does this filter try to allocate memory fo…

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## [New issue reporting templates](https://discourse.itk.org/t/new-issue-reporting-templates/1720)

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**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 5\
**Last updated:** [May 6, 2019, 11:22am UTC](https://discourse.itk.org/t/new-issue-reporting-templates/1720 "2019-05-06T11:22:52Z")

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Special recognition and thanks go to @jhlegarreta, who did an awesome job improving our GitHub issue reporting templates. :tophat: :clap: Now, when creating a new issue, a menu of categories is presented: and the iss…

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## [Get the metadata of dicom without reading the image](https://discourse.itk.org/t/get-the-metadata-of-dicom-without-reading-the-image/1833)

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**Author:** [@zandarina](https://discourse.itk.org/u/zandarina)\
**Replies:** 2\
**Last updated:** [May 6, 2019, 8:34am UTC](https://discourse.itk.org/t/get-the-metadata-of-dicom-without-reading-the-image/1833 "2019-05-06T08:34:37Z")

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Dear all, I would like to get the windows level and the windows width but without reading the image. I read in this forum that this is possible but i did not find any example without updating the reader. My code works w…

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## [Building strong ties in the community with GitHub Community Health Files](https://discourse.itk.org/t/building-strong-ties-in-the-community-with-github-community-health-files/1834)

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**Author:** [@jhlegarreta](https://discourse.itk.org/u/jhlegarreta)\
**Replies:** 1\
**Last updated:** [May 3, 2019, 8:28pm UTC](https://discourse.itk.org/t/building-strong-ties-in-the-community-with-github-community-health-files/1834 "2019-05-03T20:28:40Z")

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GitHub labels GitHub issues and pull requests can be labeled so that community members can clearly identify the areas the issues and contributions are related to. This helps a contributor grasp a clear picture of the t…

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## [Registering diffrent sized scans](https://discourse.itk.org/t/registering-diffrent-sized-scans/1831)

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**Author:** [@OmerB](https://discourse.itk.org/u/OmerB)\
**Replies:** 5\
**Last updated:** [May 3, 2019, 1:35am UTC](https://discourse.itk.org/t/registering-diffrent-sized-scans/1831 "2019-05-03T01:35:03Z")

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Hello All, I have been using ITK image registration to register a CT scan to an MRI. The CT scan is from top of the head to the chest, while the MRI (my fixed image) only includes the head. Although my wrapper of ITK g…

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## [ITK 5.0 Release Candidate 2: Spatial Objects](https://discourse.itk.org/t/itk-5-0-release-candidate-2-spatial-objects/1832)

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**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 0\
**Last updated:** [May 2, 2019, 3:07pm UTC](https://discourse.itk.org/t/itk-5-0-release-candidate-2-spatial-objects/1832 "2019-05-02T15:07:19Z")

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We are happy to announce the Insight Toolkit (ITK) Release Candidate 2! :tada: This will be the final release candidate before the 5.0.0 release, and the community is encouraged to adopt 5.0 RC 2 in ITK-based applicatio…

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## [How does the Image Registration or Image Alignment work on the pixel level?](https://discourse.itk.org/t/how-does-the-image-registration-or-image-alignment-work-on-the-pixel-level/1826)

<div class="topic-metadata">

**Author:** [@Akshay\_Kulkarni](https://discourse.itk.org/u/Akshay_Kulkarni)\
**Replies:** 5\
**Last updated:** [May 2, 2019, 6:14am UTC](https://discourse.itk.org/t/how-does-the-image-registration-or-image-alignment-work-on-the-pixel-level/1826 "2019-05-02T06:14:14Z")

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I know the basic flow or process of the Image Registration/Alignment but what happens at the pixel level when 2 images are registered/aligned i.e. similar pixels of moving image which are transformed to the fixed image a…

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## [GPU Registration - Mutual Information](https://discourse.itk.org/t/gpu-registration-mutual-information/1779)

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**Author:** [@Knut](https://discourse.itk.org/u/Knut)\
**Replies:** 1\
**Last updated:** [May 1, 2019, 4:35pm UTC](https://discourse.itk.org/t/gpu-registration-mutual-information/1779 "2019-05-01T16:35:08Z")

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Hello, by GPUDemonsRegistrationFilter (itk 4.9.1) I was able to set up image registration.Registration results are really nice after fine tuning of parameters: SetMaximumError(0.08), SetMaximumKernelWidth(10) and SetInt…

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## [\[fixed\]Is hausdorff distance implement in SimpleITK aware of spacing?](https://discourse.itk.org/t/fixed-is-hausdorff-distance-implement-in-simpleitk-aware-of-spacing/1830)

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**Author:** [@hubutui](https://discourse.itk.org/u/hubutui)\
**Replies:** 1\
**Last updated:** [May 1, 2019, 3:12pm UTC](https://discourse.itk.org/t/fixed-is-hausdorff-distance-implement-in-simpleitk-aware-of-spacing/1830 "2019-05-01T15:12:14Z")

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I check https://itk.org/SimpleITKDoxygen/html/classitk\_1\_1simple\_1\_1HausdorffDistanceImageFilter.html, but still confused. Is hausdorff distance implement in SimpleITK aware of spacing? Does the HausdorffDistanceImageF…

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## [Install ITK library into Xcode 10](https://discourse.itk.org/t/install-itk-library-into-xcode-10/1821)

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**Author:** [@yinpeter](https://discourse.itk.org/u/yinpeter)\
**Replies:** 1\
**Last updated:** [April 30, 2019, 7:51pm UTC](https://discourse.itk.org/t/install-itk-library-into-xcode-10/1821 "2019-04-30T19:51:36Z")

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I am new in ITK and have read “The ITK Software Guide”, but I can not find the solution of build/compile/install the static/shared library into Mac Xcode 10, please help me to do this, thanks a lot!

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## [Why are empty spaces observed after performing Deformable registration ?](https://discourse.itk.org/t/why-are-empty-spaces-observed-after-performing-deformable-registration/1810)

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**Author:** [@EE18D504\_SINDHURA\_C](https://discourse.itk.org/u/EE18D504_SINDHURA_C)\
**Replies:** 1\
**Last updated:** [April 29, 2019, 4:23pm UTC](https://discourse.itk.org/t/why-are-empty-spaces-observed-after-performing-deformable-registration/1810 "2019-04-29T16:23:26Z")

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I am trying to register two CT scans of the brain. I have used B-spline transformation code. The output I get after the registration is having some spaces as shown below. How to deal with it? How to apply the inverse tra…

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## [Should updateLargestPossibleRegion re-read image](https://discourse.itk.org/t/should-updatelargestpossibleregion-re-read-image/1817)

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**Author:** [@finetjul](https://discourse.itk.org/u/finetjul)\
**Replies:** 2\
**Last updated:** [April 29, 2019, 2:29pm UTC](https://discourse.itk.org/t/should-updatelargestpossibleregion-re-read-image/1817 "2019-04-29T14:29:20Z")

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Hi, I would like to know if the following behavior is expected: I instantiate an image reader (from disk) I configure and update() the reader to read a file I delete the file on disk used by the reader I call UpdateLa…

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## [Kitware Job Opportunity: R&D Engineer and Software Developer](https://discourse.itk.org/t/kitware-job-opportunity-r-d-engineer-and-software-developer/1816)

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**Author:** [@matt.mccormick](https://discourse.itk.org/u/matt.mccormick)\
**Replies:** 0\
**Last updated:** [April 26, 2019, 6:35pm UTC](https://discourse.itk.org/t/kitware-job-opportunity-r-d-engineer-and-software-developer/1816 "2019-04-26T18:35:32Z")

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There are a few new opportunities to work in the Kitware Medical Group: R&D Engineer in Biomedical Image Analysis and Machine Learning Algorithm Development Software Developer - Medical Image Analysis and Visualizat…

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## [how to use ITK in my own project in visual studio](https://discourse.itk.org/t/how-to-use-itk-in-my-own-project-in-visual-studio/1805)

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**Author:** [@maioda](https://discourse.itk.org/u/maioda)\
**Replies:** 2\
**Last updated:** [April 26, 2019, 6:32pm UTC](https://discourse.itk.org/t/how-to-use-itk-in-my-own-project-in-visual-studio/1805 "2019-04-26T18:32:35Z")

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hi , i’m new in ITK trying to include ITK in my own project in visual studio 2017 by doing : 1-project-\>properties-\>c/c+±\>general-\>Additional Include 2-project-\>properties-\>Linker-\>general-\>Additional Library 3–proj…

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## [import 3D volume from itk to vtk](https://discourse.itk.org/t/import-3d-volume-from-itk-to-vtk/1673)

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**Author:** [@Marco\_Festugato](https://discourse.itk.org/u/Marco_Festugato)\
**Replies:** 7\
**Last updated:** [April 26, 2019, 6:30pm UTC](https://discourse.itk.org/t/import-3d-volume-from-itk-to-vtk/1673 "2019-04-26T18:30:55Z")

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Hi guys! I’ve managed to read 200 DICOM files and use them to compose a volume…how can i pass this volume to VTK in order to actually see it? Thank u all for your answer :slight\_smile:

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## [ITK5 - Bug in itkPolygonSpatialObject (SpatialObjectToImage3.cxx)](https://discourse.itk.org/t/itk5-bug-in-itkpolygonspatialobject-spatialobjecttoimage3-cxx/1774)

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**Author:** [@johnaddams](https://discourse.itk.org/u/johnaddams)\
**Replies:** 9\
**Last updated:** [April 25, 2019, 12:45am UTC](https://discourse.itk.org/t/itk5-bug-in-itkpolygonspatialobject-spatialobjecttoimage3-cxx/1774 "2019-04-25T00:45:19Z")

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The example SpatialObjectToImage3.cxx does not create a binary image from a polygon using the new ITKv5, it only generates black images. The problem is probably in itkPolygonSpatialObject. Other spatial objects (i.e. itk…

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## [ImageMaskSpatialObject IsInside less than half a pixel away?](https://discourse.itk.org/t/imagemaskspatialobject-isinside-less-than-half-a-pixel-away/1807)

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**Author:** [@Niels\_Dekker](https://discourse.itk.org/u/Niels_Dekker)\
**Replies:** 0\
**Last updated:** [April 22, 2019, 8:45am UTC](https://discourse.itk.org/t/imagemaskspatialobject-isinside-less-than-half-a-pixel-away/1807 "2019-04-22T08:45:02Z")

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Pull request #751 proposes two rather simple tests for ImageMaskSpatialObject::IsInside(point): Test IsInsideSingleZeroPixel has a black pixel (pixel value zero) on a white background (pixel value 1) Test IsInsideS…

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## [How to apply a filter only to a specific region of a 3D volume? \[C++\]](https://discourse.itk.org/t/how-to-apply-a-filter-only-to-a-specific-region-of-a-3d-volume-c/1790)

<div class="topic-metadata">

**Author:** [@Riccardo\_Ballarini](https://discourse.itk.org/u/Riccardo_Ballarini)\
**Replies:** 12\
**Last updated:** [April 18, 2019, 4:20pm UTC](https://discourse.itk.org/t/how-to-apply-a-filter-only-to-a-specific-region-of-a-3d-volume-c/1790 "2019-04-18T16:20:16Z")

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Hi, I have a 3D dicom volume, I made a region growing to obtain a binary mask of a specific part of this volume, and now i want to apply a filter and work on the volume only on the part identified by the ones of the bin…

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## [How to convert image to png series?](https://discourse.itk.org/t/how-to-convert-image-to-png-series/1799)

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**Author:** [@srbn.ghosh89](https://discourse.itk.org/u/srbn.ghosh89)\
**Replies:** 1\
**Last updated:** [April 18, 2019, 12:37pm UTC](https://discourse.itk.org/t/how-to-convert-image-to-png-series/1799 "2019-04-18T12:37:28Z")

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Hi, In patient skull dicom data, there are 3 types of information, axial, coronal, saggital. I want to split these 3 types of image separately. How to do that using ITK?

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## [MattesMutualInformationImageToImageMetricv4 - Getting the rotation result](https://discourse.itk.org/t/mattesmutualinformationimagetoimagemetricv4-getting-the-rotation-result/1793)

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**Author:** [@OmerB](https://discourse.itk.org/u/OmerB)\
**Replies:** 2\
**Last updated:** [April 17, 2019, 2:12pm UTC](https://discourse.itk.org/t/mattesmutualinformationimagetoimagemetricv4-getting-the-rotation-result/1793 "2019-04-17T14:12:23Z")

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Hello everyone, I have been using ITK for image registration. Currently, I am looking to improve the accuracy the registration, and therefore trying to upgrade to ITKV4. My current implementation of ITKV3 is using Mat…

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## [Parallelize itk::ImageSeriesReader (ITK 4.12)](https://discourse.itk.org/t/parallelize-itk-imageseriesreader-itk-4-12/1745)

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**Author:** [@svg](https://discourse.itk.org/u/svg)\
**Replies:** 22\
**Last updated:** [April 17, 2019, 1:46pm UTC](https://discourse.itk.org/t/parallelize-itk-imageseriesreader-itk-4-12/1745 "2019-04-17T13:46:48Z")

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Hi I am currently working on a project that imports multiple DICOM files in one sitting. this results in some rather lengthy read times. My problem is that I have been unsuccessful in using multiple threads for reading …

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## [VTK image IO and direction matrix](https://discourse.itk.org/t/vtk-image-io-and-direction-matrix/1776)

<div class="topic-metadata">

**Author:** [@ntustison](https://discourse.itk.org/u/ntustison)\
**Replies:** 10\
**Last updated:** [April 17, 2019, 1:24pm UTC](https://discourse.itk.org/t/vtk-image-io-and-direction-matrix/1776 "2019-04-17T13:24:13Z")

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Hi all, In 2010 @blowekamp contributed a VTK Image IO module available here. I’m looking through the current incarnation and, unlike the ‘spacing’ and ‘origin’ information, can’t find where the direction is read in. A…

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## [ITK Modules a comprehensive list](https://discourse.itk.org/t/itk-modules-a-comprehensive-list/1701)

<div class="topic-metadata">

**Author:** [@pip010](https://discourse.itk.org/u/pip010)\
**Replies:** 4\
**Last updated:** [April 17, 2019, 9:31am UTC](https://discourse.itk.org/t/itk-modules-a-comprehensive-list/1701 "2019-04-17T09:31:48Z")

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When using ITK modules binding in cmake based on : find\_package(ITK REQUIRED COMPONENTS ITKCommon etc. ) how do I determine which header in which module/component it belongs to? Where is a comprehensive list of all …

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## [cropping 3d volume](https://discourse.itk.org/t/cropping-3d-volume/1788)

<div class="topic-metadata">

**Author:** [@Marco\_Festugato](https://discourse.itk.org/u/Marco_Festugato)\
**Replies:** 2\
**Last updated:** [April 16, 2019, 1:55pm UTC](https://discourse.itk.org/t/cropping-3d-volume/1788 "2019-04-16T13:55:10Z")

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Hello, i have segmented the liver from 199 CT slices of the same patient (DICOM images). How can i crop the volume in order to contain only the segmented liver? I also have to write the 3D cropped volume back to the 199…

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