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Four-Dimensional CT Analysis Using Sequential 3D-3D Registration
Published on: November 23, 2019
Analysis of calcaneonavicular coalitions using multi-planar three-dimensional computed tomography
Vidyadhar V Upasani1, Reid C Chambers, Scott J Mubarak
1Department of Orthopedic Surgery, University of California San Diego, San Diego, CA, USA.
Journal of Children'S Orthopaedics
|March 25, 2009
Summary
Three-dimensional CT scans help classify calcaneonavicular coalitions by revealing their 3D anatomy. This aids in diagnosing subtle cases and guides surgical resection to prevent iatrogenic injuries.
Area of Science:
- Orthopedic imaging
- Foot and ankle anatomy
- Skeletal radiology
Background:
- Calcaneonavicular coalition is a common cause of foot pain.
- Computed tomography (CT) is the standard for diagnosis.
- Understanding 3D anatomy is crucial for surgical planning.
Purpose of the Study:
- Evaluate 3D multi-planar CT images of calcaneonavicular coalitions.
- Compare coalitions to normal tarsal relationships.
- Classify coalitions and understand 3D anatomy for surgical aid.
Main Methods:
- Retrospective review of CT scans of 74 feet with suspected coalitions.
- Inclusion of 12 control feet with normal calcaneonavicular relationships.
- Seven measurements on 3D reconstructions to quantify coalition shape and size.
Main Results:
- 86% of patients had bilateral coalitions (69 total).
- Four coalition types identified: Type I (28%), Type II (23%), Type III (45%), Type IV (4%).
- Average coalition shape: curved wedge (16mm dorsal width, 7mm plantar width, 10mm length, 25mm depth).
Conclusions:
- 3D CT effectively classifies calcaneonavicular coalitions.
- Cuboid shape correlates with coalition ossification extent.
- 3D anatomical understanding is vital for diagnosing mild coalitions and preventing surgical complications.
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