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Using Photogrammetry for Interactive, 3D Modeling of an Open Reduction and Internal Fixation of an Elbow

November 20, 2020

Using Photogrammetry for Interactive, 3D Modeling of an Open Reduction and Internal Fixation of an Elbow

Who: Dylan S. Isaacson, MD, MPH; Kara S. Tanaka, MFA; Nigel K. Wang; Dora A.R. Storelli, MD; Lisa L. Lattanza, MD

Journal: Journal of the American Academy of Orthopaedic Surgeons Global Research

Overview: A team of researchers including Lisa. L. Lattanza, MD, Chair of Orthopaedics & Rehabilitation, have developed an inexpensive way to create 3D models of surgical anatomy and instructions on how to do it.

The team worked to create “photogrammetry” models – models that use more than one image to derive an object’s shape and size – using equipment largely available to the public. The team used a DSLR camera, taking photos of the open reduction from a variety of angles and then used specialized software to develop the image.

“Photographs are aligned based on shared points and are used to estimate the locations of the cameras during photography,” they wrote. “Next, a dense cloud of points is generated based on depth information calculated from the estimated camera positions. A polygon mesh approximating the object's surface is built from the cloud of common points. Finally, texture is applied to the mesh, giving the model a realistic appearance. The model can be navigated in all coordinate planes and used to do distance and volume measurements when calibrated to a scale object.”

The full article is available via the link.

Submitted by Matt O'Rourke on November 20, 2020