Abstract
Our main objective is to investigate how the structural information of intraluminal thrombus (ILT) can be used to predict abdominal aortic aneurysms (AAA) growth status through an automated workflow. Fifty-four human subjects with ILT in their AAAs were identified from our database; those AAAs were categorized as slowly- (< 5 mm/year) or fast-growing (≥ 5 mm/year) AAAs. In-house deep-learning image segmentation models were used to generate 3D geometrical AAA models, followed by automated analysis. All features were fed into a support vector machine classifier to predict AAA’s growth status.
The most accurate prediction model was achieved through four geometrical parameters measuring the extent of ILT, two parameters quantifying the constitution of ILT, antihypertensive medication, and the presence of co-existing coronary artery disease. The predictive model achieved an AUROC of 0.89 and a total accuracy of 83%. When ILT was not considered, our prediction’s AUROC decreased to 0.75 (P-value < 0.001).
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Data Availability
Derived Data supporting the findings of this study are available from the corresponding author (JJ) on request.
Abbreviations
- AAA:
-
Abdominal Aortic Aneurysm
- AUROC:
-
Area Under the Receiver Operator Curve
- CFD:
-
Computational Fluid Dynamics
- CTA:
-
Computed Tomography Angiography
- CACU-Net:
-
Context-Aware Cascaded U-Net
- GLM:
-
Generalized Linear Model
- GLMnet:
-
Generalized Linear Model Lasso
- ILT:
-
Intraluminal Thrombosis
- KNN:
-
K-nearest neighbor
- PHI:
-
Patient Health Information
- LoG:
-
Laplacian of Gaussian
- GLCM:
-
Gray Level Co-occurrence Matrix
- GLRLM:
-
Gray Level Run Length Matrix
- GLSZM:
-
Gray Level Size Zone Matrix
- NTT2:
-
Normalized Thrombosis Thickness 2
- ML:
-
Machine Learning
- NTTD:
-
Normalized Thrombosis Thickness Differences
- RF:
-
Random Forest (RF)
- SVM:
-
Support Vector Machine
- WSS:
-
Wall Shear Stress
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Acknowledgements
Mr. Mostafa Rezaeitaleshmahalleh is partially supported by research fellowship awards from the Health Research Institute of Michigan Technological University and Blue Cross Blue Shield of Michigan Foundation. A post-doctoral fellowship from the American Heart Association (23POST1022454) supports Dr. Nan Mu. The study benefitted from technologies developed under a research grant from NIH/NIBIB (R01-EB029570-A1).
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Rezaeitaleshmahalleh, M., Mu, N., Lyu, Z. et al. Radiomic-based Textural Analysis of Intraluminal Thrombus in Aortic Abdominal Aneurysms: A Demonstration of Automated Workflow. J. of Cardiovasc. Trans. Res. 16, 1123–1134 (2023). https://doi.org/10.1007/s12265-023-10404-7
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DOI: https://doi.org/10.1007/s12265-023-10404-7