- MR Puncture is an app for HoloLens2 that guides 3D needle puncture using the Bull's eye method and displays 3D organs (for research purposes, for free). First, use [Fix On Screen] mode of the virtual protractor. - [Simple] includes a virtual protractor which can be fixed in the center of the screen by [Fix On Screen] or placed at any place by [Tap To Place] or [QR Tracking]. - [Advanced] includes the virtual protractor, a target and needle trajectory placed by using the coordinate system of CT images, and three points registration method. - [3D Organ] imports and places 3D images of organs created from workstations by [Tap To Place] or [QR Tracking]. - For HoloLens1, use our different app “MR Needle Guide”. - Our smartphone app “AR Puncture” has similar functions to this app.