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Burris NS, Bian Z, Dominic J, Zhong J, Houben IB, van Bakel TMJ, Patel HJ, Ross BD, Christensen GE, Hatt CR. Vascular Deformation Mapping for CT Surveillance of Thoracic Aortic Aneurysm Growth. Radiology 2021; 302:218-225. [PMID: 34665030 PMCID: PMC8717815 DOI: 10.1148/radiol.2021210658] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Background Aortic diameter measurements in patients with a thoracic aortic aneurysm (TAA) show wide variation. There is no technique to quantify aortic growth in a three-dimensional (3D) manner. Purpose To validate a CT-based technique for quantification of 3D growth based on deformable registration in patients with TAA. Materials and Methods Patients with ascending and descending TAA with two or more CT angiography studies between 2006 and 2020 were retrospectively identified. The 3D aortic growth was quantified using vascular deformation mapping (VDM), a technique that uses deformable registration to warp a mesh constructed from baseline aortic anatomy. Growth assessments between VDM and clinical CT diameter measurements were compared. Aortic growth was quantified as the ratio of change in surface area at each mesh element (area ratio). Manual segmentations were performed by independent raters to assess interrater reproducibility. Registration error was assessed using manually placed landmarks. Agreement between VDM and clinical diameter measurements was assessed using Pearson correlation and Cohen κ coefficients. Results A total of 38 patients (68 surveillance intervals) were evaluated (mean age, 69 years ± 9 [standard deviation]; 21 women), with TAA involving the ascending aorta (n = 26), descending aorta (n = 10), or both (n = 2). VDM was technically successful in 35 of 38 (92%) patients and 58 of 68 intervals (85%). Median registration error was 0.77 mm (interquartile range, 0.54-1.10 mm). Interrater agreement was high for aortic segmentation (Dice similarity coefficient = 0.97 ± 0.02) and VDM-derived area ratio (bias = 0.0, limits of agreement: -0.03 to 0.03). There was strong agreement (r = 0.85, P < .001) between peak area ratio values and diameter change. VDM detected growth in 14 of 58 (24%) intervals. VDM revealed growth outside the maximally dilated segment in six of 14 (36%) growth intervals, none of which were detected with diameter measurements. Conclusion Vascular deformation mapping provided reliable and comprehensive quantitative assessment of three-dimensional aortic growth and growth patterns in patients with thoracic aortic aneurysms undergoing CT surveillance. Published under a CC BY 4.0 license Online supplemental material is available for this article. See also the editorial by Wieben in this issue.
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Dux-Santoy L, Rodríguez-Palomares JF, Teixidó-Turà G, Ruiz-Muñoz A, Casas G, Valente F, Servato ML, Galian-Gay L, Gutiérrez L, González-Alujas T, Fernández-Galera R, Evangelista A, Ferreira-González I, Guala A. Registration-based semi-automatic assessment of aortic diameter growth rate from contrast-enhanced computed tomography outperforms manual quantification. Eur Radiol 2021; 32:1997-2009. [PMID: 34655311 DOI: 10.1007/s00330-021-08273-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 07/29/2021] [Accepted: 08/14/2021] [Indexed: 12/25/2022]
Abstract
OBJECTIVES Manual assessment of aortic diameters on double-oblique reformatted computed tomography angiograms (CTA) is considered the current standard, although the reproducibility for growth rates has not been reported. Deformable registration of CTA has been proposed to provide 3D aortic diameters and growth maps, but validation is lacking. This study aimed to quantify accuracy and inter-observer reproducibility of registration-based and manual assessment of aortic diameters and growth rates. METHODS Forty patients with ≥ 2 CTA acquired at least 6 months apart were included. Aortic diameters and growth rate were obtained in the aortic root and the entire thoracic aorta using deformable image registration by two independent observers, and compared with the current standard at typical anatomical landmarks. RESULTS Compared with manual assessment, the registration-based technique presented low bias (0.46 mm), excellent agreement (ICC = 0.99), and similar inter-observer reproducibility (ICC = 0.99 for both) for aortic diameters; and low bias (0.10 mm/year), good agreement (ICC = 0.82), and much higher inter-observer reproducibility for growth rates (root: ICC = 0.96 vs 0.68; thoracic aorta: ICC = 0.96 vs 0.80). Registration-based growth rate reproducibility over a 6-month-long follow-up was similar to that obtained by manual assessment after 2.7 years (LoA = [- 0.01, 0.33] vs [- 0.13, 0.21] mm/year, respectively). Mapping of diameter and growth rate was highly reproducible (ICC > 0.9) in the whole thoracic aorta. CONCLUSIONS Registration-based assessment of aortic dilation on CTA is accurate and substantially more reproducible than the current standard, even at follow-up as short as 6 months, and provides robust 3D mapping of aortic diameters and growth rates beyond the pre-established anatomic landmarks. KEY POINTS • Registration-based semi-automatic assessment of progressive aortic dilation on CTA is accurate and substantially more reproducible than the current standard. • The registration-based technique allows robust growth rate assessment at follow-up as short as 6 months, with a similar reproducibility to that obtained by manual assessment at around 3 years. • The use of image registration provides robust 3D mapping of aortic diameters and growth rates beyond the pre-established anatomic landmarks.
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Affiliation(s)
| | - Jose F Rodríguez-Palomares
- Vall d'Hebron Institut de Recerca (VHIR), Barcelona, Spain.
- CIBER-CV, Instituto de Salud Carlos III, Madrid, Spain.
- Department of Cardiology, Hospital Universitari Vall D'Hebron, Paseo Vall d'Hebron 119-129, 08035, Barcelona, Spain.
- Universitat Autònoma de Barcelona, Bellaterra, Spain.
| | - Gisela Teixidó-Turà
- Vall d'Hebron Institut de Recerca (VHIR), Barcelona, Spain
- CIBER-CV, Instituto de Salud Carlos III, Madrid, Spain
- Department of Cardiology, Hospital Universitari Vall D'Hebron, Paseo Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Aroa Ruiz-Muñoz
- Vall d'Hebron Institut de Recerca (VHIR), Barcelona, Spain
- CIBER-CV, Instituto de Salud Carlos III, Madrid, Spain
| | - Guillem Casas
- Department of Cardiology, Hospital Universitari Vall D'Hebron, Paseo Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Filipa Valente
- Department of Cardiology, Hospital Universitari Vall D'Hebron, Paseo Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Maria Luz Servato
- Department of Cardiology, Hospital Universitari Vall D'Hebron, Paseo Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Laura Galian-Gay
- Department of Cardiology, Hospital Universitari Vall D'Hebron, Paseo Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Laura Gutiérrez
- Department of Cardiology, Hospital Universitari Vall D'Hebron, Paseo Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Teresa González-Alujas
- Department of Cardiology, Hospital Universitari Vall D'Hebron, Paseo Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Rubén Fernández-Galera
- Department of Cardiology, Hospital Universitari Vall D'Hebron, Paseo Vall d'Hebron 119-129, 08035, Barcelona, Spain
| | - Arturo Evangelista
- Vall d'Hebron Institut de Recerca (VHIR), Barcelona, Spain
- CIBER-CV, Instituto de Salud Carlos III, Madrid, Spain
- Department of Cardiology, Hospital Universitari Vall D'Hebron, Paseo Vall d'Hebron 119-129, 08035, Barcelona, Spain
- Instituto del Corazón. Quirónsalud-Teknon, Barcelona, Spain
| | - Ignacio Ferreira-González
- Vall d'Hebron Institut de Recerca (VHIR), Barcelona, Spain.
- Department of Cardiology, Hospital Universitari Vall D'Hebron, Paseo Vall d'Hebron 119-129, 08035, Barcelona, Spain.
- Universitat Autònoma de Barcelona, Bellaterra, Spain.
- CIBER de Epidemiología y Salud Pública, CIBERESP, Instituto de Salud Carlos III, Madrid, Spain.
| | - Andrea Guala
- Vall d'Hebron Institut de Recerca (VHIR), Barcelona, Spain
- CIBER-CV, Instituto de Salud Carlos III, Madrid, Spain
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Aortic Intimo-intimal Intussusception: A Pooled Analysis of Published Reports. Ann Vasc Surg 2021; 75:471-478. [PMID: 33831523 DOI: 10.1016/j.avsg.2021.02.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 02/18/2021] [Accepted: 02/19/2021] [Indexed: 11/20/2022]
Abstract
AIM Aortic intimo-intimal intussusception (AoII) is a rare manifestation of aortic dissection with high mortality. This study aimed to obtain a comprehensive understanding of AoII. METHODS Three databases (PubMed, Scopus, Embase) were searched with predefined search terms ["intimal intussusception", "aortic intussusception", "(circumferential) AND (intimal dissection)" and "(circumferential) AND (aortic dissection)"]. Demographics, clinical manifestations, imaging methods, therapies, and follow-up data were recorded and analyzed. RESULTS The literature search finally identified 81 papers comprising 87 patients (Mean age: 53.7 ± 14.9 years old; male: n = 63). According to morphologic criteria (orientation of AoII intimal flap), patients were divided into three groups: antegrade (n = 37), retrograde (n = 49) and bidirectional (n = 1) orientation. The most frequent symptoms in antegrade group were chest pain (62.2%), syncope (27%), and unconsciousness (21.6%), while in retrograde group, they were chest pain (71.4%), dyspnea (20.4%), and back pain (16.3%). Regarding applied imaging modalities, 67.5% of patients in antegrade group were diagnosed with≥2 methods, comparing with 87.7% in retrograde group. A total of 21 patients (24.1%) with AoII finally died, among which 13.8% (12/87) died before surgery. CONCLUSION AoII is a rare form of aortic dissection with high mortality. Antegrade orientation of the intima flap was more accompanied with neurological disorders and asymmetric blood pressure, while retrograde orientation mostly manifested with aortic regurgitation. Application of multiple imaging examinations may detect this rare entity in time.
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Ahmed Y, Nama N, Houben IB, van Herwaarden JA, Moll FL, Williams DM, Figueroa CA, Patel HJ, Burris NS. Imaging surveillance after open aortic repair: a feasibility study of three-dimensional growth mapping. Eur J Cardiothorac Surg 2021; 60:651-659. [PMID: 33779717 DOI: 10.1093/ejcts/ezab142] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 02/01/2021] [Accepted: 02/14/2021] [Indexed: 12/28/2022] Open
Abstract
OBJECTIVES Confident growth assessment during imaging follow-up is often limited by substantial variability of diameter measurements and the fact that growth does not always occur at standard measurement locations. There is a need for imaging-based techniques to more accurately assess growth. In this study, we investigated the feasibility of a three-dimensional aortic growth assessment technique to quantify aortic growth in patients following open aortic repair. METHODS Three-dimensional aortic growth was measured using vascular deformation mapping (VDM), a technique which quantifies the localized rate of volumetric growth at the aortic wall, expressed in units of Jacobian (J) per year. We included 16 patients and analysed 6 aortic segments per patient (96 total segments). Growth was assessed by 3 metrics: clinically reported diameters, Jacobian determinant and targeted diameter re-measurements. RESULTS VDM was able to clearly depict the presence or absence of localized aortic growth and allows for an assessment of the distribution of growth and its relation to anatomic landmarks (e.g. anastomoses, branch arteries). Targeted diameter change showed a stronger and significant correlation with J (r = 0.20, P = 0.047) compared to clinical diameter change (r = 0.15, P = 0.141). Among 20/96 (21%) segments with growth identified by VDM, growth was confirmed by clinical measurements in 7 and targeted re-measurements in 11. Agreement of growth assessments between VDM and diameter measurements was slightly higher for targeted re-measurements (kappa = 0.38) compared to clinical measurements (kappa = 0.25). CONCLUSIONS Aortic growth is often uncertain and underappreciated when assessed via standard diameter measurements. Three-dimensional growth assessment with VDM offers a more comprehensive assessment of growth, allows for targeted diameter measurements and could be an additional tool to determine which post-surgical patients at high and low risk for future complications.
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Affiliation(s)
- Yunus Ahmed
- Department of Cardiac Surgery, University of Michigan, Ann Arbor, MI, USA.,Department of Vascular Surgery, University Medical Center Utrecht, Utrecht, Netherlands
| | - Nitesh Nama
- Department of Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Ignas B Houben
- Department of Vascular Surgery, University Medical Center Utrecht, Utrecht, Netherlands
| | | | - Frans L Moll
- Department of Vascular Surgery, University Medical Center Utrecht, Utrecht, Netherlands
| | - David M Williams
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA
| | - C Alberto Figueroa
- Department of Surgery, University of Michigan, Ann Arbor, MI, USA.,Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Himanshu J Patel
- Department of Cardiac Surgery, University of Michigan, Ann Arbor, MI, USA
| | - Nicholas S Burris
- Department of Radiology, University of Michigan, Ann Arbor, MI, USA.,Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
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