Accuracy of ZedView, the Software for Three-Dimensional Measurement and Preoperative Planning: A Basic Study

Area of Science:

• Orthopedic Surgery
• Medical Imaging
• Biomechanical Engineering

Background:

• Three-dimensional (3D) shape modeling from 2D tomographic images is crucial in orthopedic surgery for bone measurements, surgical planning, and evaluation.
• ZedView® software was developed for 3D measurement and preoperative planning in orthopedic procedures.
• The software is utilized for precise implant placement and osteotomy in pre- and postoperative assessments.

Purpose of the Study:

• To evaluate the measurement error of ZedView® surgical planning software.
• To compare the software's accuracy against a three-dimensional measuring instrument (3DMI) using human bones.

Main Methods:

• The study used three human cadaver bones: pelvis, femur, and tibia, with attached markers.
• Study 1 involved measuring marker coordinates and inter-marker distances/angles with 3DMI as true values.
• Study 2 measured distances from a plane to markers with 3DMI as true values.
• Bones were imaged with computed tomography and measured using ZedView®; errors were calculated against true values.

Main Results:

• In Study 1, length measurement error was <0.3 mm and angle error was <0.25° when comparing ZedView® to 3DMI.
• In Study 2, the average error in distance from the retrocondylar plane to markers was 0.43 mm.
• The mean diameter of markers measured by 3DMI was 23.951 ± 0.055 mm.

Conclusions:

• ZedView® surgical planning software demonstrates high accuracy in measuring distances and angles between marker centers.
• The software's precision makes it highly valuable for both pre- and postoperative evaluations in orthopedic surgery.
• The study confirms the software's utility for accurate implant placement and osteotomy planning.