Australian doctors use 4D printing and CT scanning techniques for preoperative planning
Release date: 2016-05-25
Earlier this month, thousands of doctors from the Royal Australian College of Surgeons and the Royal College of Surgeons gathered at the Brisbane Convention and Exhibition Center for an annual scientific conference. Each year, the annual conference will hold a series of seminars, workshops, forums, etc. around the current hot issues in the field of surgical medicine. There was a discussion in the middle of this discussion that looked at a case where a group of doctors used dynamic 4D printing techniques for pre-operative planning of hand surgery.
Responsible for this research is Dr. Michael Chae, a plastic surgeon and a Ph.D. student at Monash University in Melbourne. The research team described how they added time dimensions to the tactile model to help provide improved anatomical information about hand bone movement. The team used 4D computed tomography (CT) to scan the bones of the patient's hand to help shape the accurate representation of their hands while performing actions such as thumb abduction, palm and side pinch.
“In the past decade, 3D printing has changed the way surgeons plan for preoperative planning. So here we can explore how to apply 4D printing to surgical planning.†Dr. Chae said: “We show how 4D printing works. Accurately show the corresponding changes in the metacarpal bone during various thumb movements. With the increase of 4D CT scanning equipment, 4D printing will become a commonly accepted method in surgery and improve the clinical treatment of patients."
A 3D printed tactile model representing the performance of the carpal and metacarpal bones in various hand movements: thumb extension (left), palm (center) and side pinch (right)
According to Tiangong, the research team used an Aquilion ONE 320-row CT device from Toshiba that captures three different thumb movements from the patient and uploads it to the OsiriX software, where the image is Render and get ready for 3D printing. The research team then exported the 3D haptic models as STL files and printed them out using a Cube 2 desktop 3D printer from 3D Systems. To validate their study, Dr. Chae and his colleagues compared the angle between the first metacarpal and the second metacarpal with 4D CT data and a 4D printed model to help ensure anatomical accuracy.
Scan data from CT to STL file
The title of this case study is "4D Printing: A New Development, Principle and Application of Light Curing Modeling Based on CT Imaging (Four-Dimensional (4D) Printing: A New Evolution in Computed Tomography-Guided Stereolithographic Modeling. Principles and Application) 》. The study was published last year in the Journal of Reconstructive Microsurgery.
Fundamentally, Dr. Chae's research team called "4D printing", which actually adds a time dimension to the 3D printed surgical model to help show the change in metacarpal position during thumb movement. Therefore, these 4D printed models provide more dynamic information about the patient's anatomy to help the surgeon obtain accurate and detailed information before performing the procedure. (Compiled from 3DPrint.com)
Source: Tiangongshe
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