What steps are involved in enabling the ROI Threshold Tool for CT images on the Basic Viewer OHIF v3 stable?

We have a requirement to enable the ROI Threshold Tool on the Basic Viewer, allowing the user to draw regions of interest (ROI) on CT images. While we have successfully added the tool to the Toolbar and the right-side panel of the Basic Viewer, we are now seeking guidance on the implementation process to enable users to interactively draw ROIs on the CT images. We would appreciate any assistance or solution you can provide to fulfill this requirement.