Cone beam computed tomography-based models versus multislice spiral computed tomography-based models for assessing...

Area of Science:

• Medical Imaging
• Radiology
• Biomedical Engineering

Background:

• Quantitative comparison of condylar morphology is crucial for treatment planning in reconstructive surgery.
• Virtual three-dimensional (3D) surface models offer advanced visualization and analysis of complex anatomical structures.
• Cone beam computed tomography (CBCT) and multislice spiral computed tomography (MSCT) are advanced imaging modalities with distinct characteristics.

Purpose of the Study:

• To quantitatively compare the accuracy of condylar morphology assessment using virtual 3D surface models generated from CBCT and MSCT imaging.
• To determine if CBCT-derived models are a reliable alternative to MSCT-derived models for condylar morphology analysis.

Main Methods:

• Secondary data analysis of CBCT and MSCT scans from 74 patients undergoing condylar resection and prosthetic joint replacement.
• Construction of 146 homologous 3D condylar surface models from each imaging modality.
• Voxel-based registration and SPHARM-PDM software for model approximation and matching, followed by ShapeAnalysisMANCOVA for statistical comparison.

Main Results:

• No statistically significant difference was found between the average CBCT- and MSCT-based condylar models (P > .68).
• Pairwise comparisons revealed a mean difference of 0.406 mm (SD, 0.173).
• One-sample t-tests confirmed that the mean differences between paired models were not clinically significant (P = .411).

Conclusions:

• 3D surface models derived from CBCT images are comparable to those generated from MSCT scans.
• CBCT imaging provides reliable virtual 3D models for assessing condylar morphology.
• CBCT can be considered a dependable tool for condylar morphology evaluation in clinical practice.