Brush Tool draws ellipses

Describe Your Question

Hi all,

I am using OHIF (v3.8.0) to perform segmentations. I am using the Brush Tool to draw them, but even though the cursor is a circle, when I click an ellipsis is drawn.

I managed to link this issue with the fact that my image is slightly tilted (Orientation = 1/0/0/0/0.997/0.007). When I use the default layout, elllipses are drawn, but when I use for instance the MPR layout, circles are drawn.

However, I don’t want to use the Axial viewport with world coordinates, I want to use a viewport that corresponds to my tilted images (like the default layout) and still draw circles like expected.

I have searched through viewports, displaySets, sopClassHandlers and cornerstone and I haven’t found a way to draw circles in my segmentations. I guess I could create my own tool, but I am wondering if there is a simpler way

Thanks in advance

What steps can we follow to reproduce the bug?

  1. Import a tilted image
  2. Open the segmentation mode
  3. Create a segmentation
  4. Select the brush tool
  5. Draw on the viewport

it is probably because your data is oblique acquired, use the sphere tool it has the correct logic, until we fix the circle in oblique

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