Validation of a Three-Dimensional Computed Tomography Reconstruction Tool for Aortic Valve Calcium Quantification

Area of Science:

• Cardiology
• Medical Imaging
• Computational Analysis

Background:

• Aortic valve calcification severity correlates with aortic stenosis.
• High calcium scores predict complications like conduction disturbances and paravalvular leakage post-transcatheter aortic valve replacement (TAVR).
• Multislice computed tomography (MSCT) is crucial for preprocedural planning in TAVR.

Purpose of the Study:

• To validate a semiautomated calcium quantification tool (3mensio Structural Heart) against a conventional manual method.
• To assess the accuracy and reliability of the 3mensio Structural Heart software for aortic valve calcium scoring.

Main Methods:

• Retrospective analysis of 50 patients undergoing MSCT for TAVR planning.
• Comparison of semiautomated Agatston calcium scores from 3mensio Structural Heart with manually obtained scores from IntelliSpace Portal.
• Statistical analysis including intraclass correlation coefficient (ICC) and inter/intraobserver variability.

Main Results:

• Excellent correlation (ICC=0.995) between semiautomated (3mensio) and manual (IntelliSpace) Agatston calcium scores.
• Minimal mean difference (-0.18) between the two scoring methods.
• High interobserver (0.993) and intraobserver (0.995) reliability for the semiautomated tool.

Conclusions:

• The semiautomated calcium quantification module in 3mensio Structural Heart is a highly reliable tool.
• It demonstrates excellent correlation with conventional manual calcium scoring methods.
• This validated tool can aid in assessing aortic valve stenosis severity and guiding TAVR procedures.