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fix(voi) : wrong voiRange for some multi-frame instances or multi-instance series rendered on the same viewport #241

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Oct 7, 2022
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fix(voi) : wrong voiRange for some multi-frame instances or multi-instance series rendered on the same viewport #241

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9 changes: 9 additions & 0 deletions packages/core/src/RenderingEngine/StackViewport.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1765,6 +1765,15 @@ class StackViewport extends Viewport implements IStackViewport {
}

this.initialVOIRange = voiRange;

if (this.voiApplied && typeof voiRange === 'undefined') {
// There are some cases when different frames within the same multi-frame
// file are not hitting the actor cache because above
// this.__checkVTKImageDataMatchesCornerstoneImage() call results in
// "false".
// In that case we want to keep the applied VOI range.
voiRange = this.voiRange;
}
this.setProperties({ voiRange });

// At the moment it appears that vtkImageSlice actors do not automatically
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