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