One of the more interesting applications for 3D printing in the medical industry is the use of 3D software and 3D printers in surgical preplanning. It has been used to help doctors in a wide variety of complicated medical cases and probably saved many of the lives involved. The process involves converting a combination of CT scan, MRI or ultrasound data into a 3D model and then 3D printing it using a high-quality 3D printer. The 3D printed replica, usually an organ, can then be studied by doctors who can visualize what the inside of the patient’s body will look like, and give them the chance to plan the best way to perform any complicated procedures.