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pyushkevich / itksnap

ITK-SNAP medical image segmentation tool
http://www.itksnap.org
GNU General Public License v3.0
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Multi-Component Display menu grayed out when loading 4D NiFTI files #89

Closed dinsdale3 closed 1 year ago

dinsdale3 commented 1 year ago

On version 4.0.0, when loading a 4D image file (NiFTI in my case), if I click on the arrow at the top of the viewport next to the filename, the Multi-Component Display menu item is grayed out. With the same image, on version 3.8.0 this item can be selected and the individual 4th dimension images can be chosen (as well as the Mag, Max, and Avg).

On version 4.0.0, Edit/4D DIsplay/Toggle 4D Replay does work, so the 4th dimension is being at least partially supported.

Build date Thu02/16/2023 Git commit hash 3bc2bdce1eed5baf53960f74fd0b32fe476b2e0b Git commit date 2023-02-16 14:11:06 -0500 Git branch master Build site name pylenovo_win11 Build OS Windows-10.0.22621 AMD64 Build type Release ITK version 5.2.1 VTK version 9.1.0 Qt version 6.2.4 CMake version 3.25.1 C compiler MSVC 19.34.31935.0 C++ compiler MSVC 19.34.31935.0

jilei-hao commented 1 year ago

In 4.0 we no longer read 4D images as multi-component images. So the grey out of multi-component menu is by-design. The multi-component menu now is only for images with number of components greater than 1.

There are a lot of features added in 4.0 to support 4D images navigation and analysis such as 4D cursor location, 4D replay (both in the menu and the layer inspector), intensity under cursor across timepoints, and more. See this page for more info: http://www.itksnap.org/pmwiki/pmwiki.php?n=Documentation.NewFeaturesVersion40

dinsdale3 commented 1 year ago

I'm glad to hear this wasn't a bug. However, the change in functionality was confusing to at least this user (given the limited 4.0-specific documentation at this point).

I have some related questions but will move them to the user discussion list as this is no longer a 'bug' report. Thanks