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López-Linares K, García I, García A, Cortes C, Piella G, Macía I, Noailly J, González Ballester MA. Image-Based 3D Characterization of Abdominal Aortic Aneurysm Deformation After Endovascular Aneurysm Repair. Front Bioeng Biotechnol 2019; 7:267. [PMID: 31737613 PMCID: PMC6838223 DOI: 10.3389/fbioe.2019.00267] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 09/27/2019] [Indexed: 12/30/2022] Open
Abstract
An abdominal aortic aneurysm (AAA) is a focal dilation of the abdominal aorta, that if not treated, tends to grow and may rupture. The most common treatment for AAAs is the endovascular aneurysm repair (EVAR), which requires that patients undergo Computed Tomography Angiography (CTA)-based post-operative lifelong surveillance due to the possible appearance of complications. These complications may again lead to AAA dilation and rupture. However, there is a lack of advanced quantitative image-analysis tools to support the clinicians in the follow-up. Currently, the approach is to evaluate AAA diameter changes along time to infer the progress of the patient and the post-operative risk of AAA rupture. An increased AAA diameter is usually associated with a higher rupture risk, but there are some small AAAs that rupture, whereas other larger aneurysms remain stable. This means that the diameter-based rupture risk assessment is not suitable for all the cases, and there is increasing evidence that the biomechanical behavior of the AAA may provide additional valuable information regarding the progression of the disease and the risk of rupture. Hence, we propose a promising methodology for post-operative CTA time-series registration and subsequent aneurysm biomechanical strain analysis. From these strains, quantitative image-based descriptors are extracted using a principal component analysis of the tensile and compressive strain fields. Evaluated on 22 patients, our approach yields a mean area under the curve of 88.6% when correlating the strain-based quantitative descriptors with the long-term patient prognosis. This suggests that the strain information directly extracted from the CTA images is able to capture the biomechanical behavior of the aneurysm without relying on finite element modeling and simulation. Furthermore, the extracted descriptors set the basis for possible future imaging biomarkers that may be used in clinical practice. Apart from the diameter, these biomarkers may be used to assess patient prognosis and to enable informed decision making after an EVAR intervention, especially in difficult uncertain cases.
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Affiliation(s)
- Karen López-Linares
- Vicomtech Foundation, San Sebastián, Spain.,Bioengineering Area, Biodonostia Health Research Institute, San Sebastián, Spain.,BCN Medtech, Department of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain
| | - Inmaculada García
- Vicomtech Foundation, San Sebastián, Spain.,Bioengineering Area, Biodonostia Health Research Institute, San Sebastián, Spain
| | - Ainhoa García
- Bioengineering Area, Biodonostia Health Research Institute, San Sebastián, Spain.,Donostia University Hospital, San Sebastián, Spain
| | - Camilo Cortes
- Vicomtech Foundation, San Sebastián, Spain.,Bioengineering Area, Biodonostia Health Research Institute, San Sebastián, Spain
| | - Gemma Piella
- BCN Medtech, Department of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain
| | - Iván Macía
- Vicomtech Foundation, San Sebastián, Spain.,Bioengineering Area, Biodonostia Health Research Institute, San Sebastián, Spain
| | - Jérôme Noailly
- BCN Medtech, Department of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain
| | - Miguel A González Ballester
- BCN Medtech, Department of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain.,ICREA, Barcelona, Spain
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Legarreta JH, Boto F, Macía I, Maiora J, García G, Paloc C, Graña M, de Blas M. Hybrid Decision Support System for Endovascular Aortic Aneurysm Repair Follow-Up. LECTURE NOTES IN COMPUTER SCIENCE 2010. [DOI: 10.1007/978-3-642-13769-3_61] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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