Freehand Scissors Tool
How to set up the FreehandScissors tool:
// Init cornerstone tools
cornerstoneTools.init();
// Enable any elements, and display images
// ...
// Add our tool, and set it's mode
const FreehandScissorsTool = cornerstoneTools.FreehandScissorsTool;
cornerstoneTools.addTool(FreehandScissorsTool)
cornerstoneTools.setToolActive('FreehandScissors', { mouseButtonMask: 1 })