Shape context and projection geometry constrained vasculature matching for 3D reconstruction of coronary artery

2016 ◽  
Vol 195 ◽  
pp. 65-73 ◽  
Author(s):  
Ruoxiu Xiao ◽  
Jian Yang ◽  
Jingfan Fan ◽  
Danni Ai ◽  
Guangzhi Wang ◽  
...  
Keyword(s):  
Coronary Artery ◽  
3D Reconstruction ◽  
Shape Context ◽  
Projection Geometry

scholarly journals 3D Reconstruction with Coronary Artery Based on Curve Descriptor and Projection Geometry-Constrained Vasculature Matching

Information ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 38
Author(s):  
Jijun Tong ◽  
Shuai Xu ◽  
Fangliang Wang ◽  
Pengjia Qi
Keyword(s):  
Coronary Artery ◽  
3D Reconstruction ◽  
Trust Region Method ◽  
Trust Region ◽  
Geometric Transformation ◽  
Error Matrix ◽  
Point Pair ◽  
Marquardt Algorithm ◽  
Projection Geometry ◽  
Point Set

This paper presents a novel method based on a curve descriptor and projection geometry constrained for vessel matching. First, an LM (Leveberg–Marquardt) algorithm is proposed to optimize the matrix of geometric transformation. Combining with parameter adjusting and the trust region method, the error between 3D reconstructed vessel projection and the actual vessel can be minimized. Then, CBOCD (curvature and brightness order curve descriptor) is proposed to indicate the degree of the self-occlusion of blood vessels during angiography. Next, the error matrix constructed from the error of epipolar matching is used in point pairs matching of the vascular through dynamic programming. Finally, the recorded radius of vessels helps to construct ellipse cross-sections and samples on it to get a point set around the centerline and the point set is converted to mesh for reconstructing the surface of vessels. The validity and applicability of the proposed methods have been verified through experiments that result in the significant improvement of 3D reconstruction accuracy in terms of average back-projection errors. Simultaneously, due to precise point-pair matching, the smoothness of the reconstructed 3D coronary artery is guaranteed.

scholarly journals Application of an OCT-based 3D reconstruction framework to the hemodynamic assessment of an ulcerated coronary artery plaque

2020 ◽  
Vol 78 ◽  
pp. 74-81 ◽  
Author(s):  
Susanna Migliori ◽  
Claudio Chiastra ◽  
Marco Bologna ◽  
Eros Montin ◽  
Gabriele Dubini ◽  
...  
Keyword(s):  
Coronary Artery ◽  
3D Reconstruction ◽  
Coronary Artery Plaque ◽  
Hemodynamic Assessment

scholarly journals Percutaneous Transapical Access for Performing Interventional Procedures in Patients with Structural Heart Pathologies: a Single Center Experience

2020 ◽  
pp. 45-50
Author(s):  
I. O. Ditkivskyy ◽  
M. S. Petrov ◽  
N. S. Yashchuk ◽  
Y. V. Yermolovych ◽  
B. V. Cherpak ◽  
...  
Keyword(s):  
Coronary Artery ◽  
3D Reconstruction ◽  
Left Atrial ◽  
Paravalvular Leak ◽  
Structural Interventions ◽  
Overall Efficiency ◽  
Ct Data ◽  
Treatment Procedures ◽  
Transapical Access ◽  
All Treatment

The paper describes the experience of percutaneous transapical access (PTA) usage for performing transcatheter structural interventions in 7 patients. Four patients had paravalvular insufficiency of the prosthetic mitral valve, one patient had a reshunt of ventricular septal defect and a pseudoaneurysm in the area of fibrous mitral-aortic continuity. Two patients underwent PTA for diagnostic examination. The visualization methods, planning algorithm, and technique of the procedure have been described. The overall efficiency was 100%, the degree of paravalvular leak was reduced in all treatment procedures. The main reported complication was hemothorax in two cases. In one case, the occluder migrated from the paravalvular fistula channel into the left atrial cavity with subsequent endovascular extraction. The aim. This study was designed to evaluate modern outlooks about the use of PTA during interventions, enhance the available data and extrapolate the authors’ own experience with the development of their own conclusions and recommendations. Materials and methods. To differentiate structural pathology, the initial selection of patients was performed according to the findings of transthoracic and transesophageal ultrasound. The next step in planning of PTA is analysis of computed tomography (CT) data with 3D reconstruction. PTA and subsequent interventions were performed in the hybrid catheterization laboratory after evaluation of CT data, guided by transesophageal echocardiography (TEE), and with the establishment of optimal angles of the angiograph arc for the best fluoroscopic imaging. Besides, in order to avoid trauma of left anterior descending coronary artery, selective angiography was performed. Surgical team support was essential in all cases. Results. The overall efficiency was 100%, reduction of the degree of paravalvular leak was achieved in all treatment procedures. The main reported complication was hemothorax in two cases. In one case, the occluder migrated from the paravalvular fistula channel into the left atrial cavity with subsequent endovascular extraction. Discussion. The subject of our research was PTA for structural interventions. Available data of the world literature shows that this technology has been developed since the end of the last century. The main complications that can be encountered during the intervention by PTA were: hemothorax; hemopericardium/tamponade; rupture of the coronary artery; pneumothorax; arrhythmia; death. In four out of five cases, we used a Lifetech HeartR PDA occluder to close the puncture site of the left ventricular apex. In the fifth case, LifeTech mVSD occluder was used. Conclusions. Correction of structural pathology by routine use of PTA requires a comprehensive approach to the diagnosis of this pathology using transthoracic and transesophageal echocardiography, contrast-enhanced CT and 3D reconstruction. Support of a multidisciplinary team to provide transition to conventional cardiac surgery access in case of periprocedural complications is mandatory. Due to the emergence of specialized implants, as well as the development of imaging techniques, PTA requires attention and further study.

scholarly journals 3D Reconstruction of Coronary Artery Stents From Optical Coherence Tomography: Experimental Validation and Clinical Feasibility

2021 ◽  
Author(s):  
Wei Wu ◽  
Khan Behram A. ◽  
Mohammadali Sharzehee ◽  
Shijia Zhao ◽  
Saurabhi Samant ◽  
...  
Keyword(s):  
Coronary Artery ◽  
3D Reconstruction ◽  
Coronary Arteries ◽  
Side Branch ◽  
Patient Specific ◽  
Micro Computed Tomography ◽  
Stent Deployment ◽  
Structural Morphology ◽  
Stent Strut ◽  
Coronary Artery Stents

Abstract The structural morphology of stents (e.g. expansion, lumen scaffolding, strut apposition, tissue protrusion, side branch jailing, strut fracture), and the local hemodynamic environment after stent deployment in coronary arteries are key determinants of procedural success and subsequent clinical outcomes. High-resolution intracoronary imaging has the potential to enable the geometrically correct 3D reconstruction of coronary stents. The aim of this work was to present a novel algorithm for 3D stent reconstruction of coronary artery stents by OCT and angiography, and test experimentally its accuracy, reproducibility, clinical feasibility and ability to perform CFD studies. Our method has the following steps: 3D lumen reconstruction by OCT and angiography, stent strut segmentation on OCT images, packaging, rotation and straightening of the segmented struts, and planar unrolling of the segmented struts, planar stent wireframe reconstruction, rolling back of the planar stent wireframe to the 3D reconstructed lumen, and stent volume reconstruction. We tested the accuracy and reproducibility of our method in stented patient-specific silicone models using micro computed tomography and stereoscopy as reference. The clinical feasibility and CFD studies were performed in clinically stented coronary bifurcations. Our experimental and clinical studies showed that our proposed algorithm can reproduce the complex stent configuration in space with high precision and reproducibility. Furthermore, our studies showed that the algorithm is feasible in clinical cases with stents deployed in diseased, bifurcated coronary arteries, enabling CFD studies to assess the hemodynamic environment. Notably, the high accuracy of our algorithm was consistent across different stent designs and diameters. Our method coupled with patient-specific CFD studies can facilitate stenting optimization, training in stenting techniques, and stent research and development.

Spontaneous coronary artery dissection: insights from intravascular ultrasound

2020 ◽  
Vol 41 (Supplement_2) ◽  
Author(s):  
E.S Ciurica ◽  
R Jackson ◽  
D Premawardhana ◽  
A Persu ◽  
D Adlam
Keyword(s):  
Coronary Artery ◽  
3D Reconstruction ◽  
Intravascular Ultrasound ◽  
False Lumen ◽  
Artery Dissection ◽  
Spontaneous Coronary Artery Dissection ◽  
True Lumen ◽  
Coronary Artery Dissection ◽  
Key Features ◽  
Elastic Lamina

Abstract Introduction Spontaneous Coronary Artery Dissection (SCAD) may be at the origin of up to 25% of acute coronary events in women <50 yo with no or few risk factors. The diagnosis of SCAD is challenging and in some cases it may be ascertained only by intracoronary imaging such as intravascular ultrasound (IVUS) or optical coherence tomography (OCT). IVUS is widely available and has a better depth penetration compared to OCT, showing the extent of the false lumen and the aspect of the adventitia but its lower resolution does not always allow the visualization of smaller structures such as fenestrations. In a previous study we investigated the role of OCT in understanding the pathophysiology of SCAD and we reported a number of OCT complications. It is not known if these also apply to IVUS but since IVUS does not require additional contrast injection, the risk of false lumen (FL) propagation should be lower. Aim of the study To analyze the value of IVUS in the assessment of key features of SCAD and to explore the feasibility of three-dimensional (3D) reconstruction using IVUS imaging. Methods We collated the imaging findings of 15 cases of SCAD for which IVUS was used as part of routine clinical care. Images were assessed to determine the visualisation of the true lumen, the false lumen extent and its contents, the intima-media membrane, the presence of fenestrations, the external elastic lamina and underlying adventitia. Furthermore, we performed a 3D reconstruction of a type 2a dissection of the right coronary artery. The IVUS images were exported in DICOM format. The segmentation of the true and false lumens in the regions of interest was manually done using the ImageJ software. Subsequent images were processed using 3D Slicer and Paraview in order to obtain the 3D reconstruction of the dissected segment. Results The false lumen was entirely visible in 13/15 cases (87%) and the external elastic lamina in 12/15 cases (80%). In 3/15 cases (20%) the dissection was circumferential. The false lumen content had lower echogenicity compared to the surrounding tissue in all 15 cases. There was no visible fenestration. The 3D reconstruction (Figure 1) showed that the false lumen was larger than the true lumen. The general cross-sectional appearance was that of a “horseshoe” dissection but there was also a short segment of circumferential dissection and the intima-media membrane looked thickened. Conclusion Despite its resolution being lower than OCT, IVUS has a deep penetration and provides adequate imaging of the key features of SCAD. Perspectives We plan to further expand these findings in a larger series, intending to better characterize the false lumen and the adventitia in SCAD. IVUS findings in SCAD, 3D reconstruction Funding Acknowledgement Type of funding source: None

EFFECT OF THE MYOCARDIUM NON-UNIFORMITY ON THE HEART FUNCTIONAL RESERVE

2005 ◽  
Vol 05 (01) ◽  
pp. 29-37 ◽  
Author(s):  
FELIX A. BLYAKHMAN ◽  
ELENA V. MARCHENKO ◽  
SVETLANA G. KOLCHANOVA ◽  
JULIA A. ZINOVEVA ◽  
BORIS L. MIRONKOV ◽  
...  
Keyword(s):  
Coronary Artery ◽  
3D Reconstruction ◽  
Heart Diseases ◽  
Inverse Correlation ◽  
Left Ventricular ◽  
Functional Aspect ◽  
Functional Reserve ◽  
Stenotic Lesion ◽  
Strong Inverse Correlation

The goal of this study is to understand the role of structural-and-functional inhomogeneity (SFI) in the left ventricular (LV) wall. According to the peculiarities of heart diseases development, we supposed the existence of causal relationship between SFI and the heart functional reserve, i.e. an ability to maintain pump function in case of additional load. Here, we looked into the functional aspect of SFI phenomenon. Sixteen IHD patients with a different extent of coronary artery stenotic lesion were chosen for this investigation. The patients were underwent the transesophageal ultrasound examinations, and LV 3D reconstruction was performed. To estimate the extent of the functional non-uniformity, the myocardium elastic properties in LV wall regions and LV regional motion were defined. We found out a strong inverse correlation between the extent of LV functional non-uniformity and the heart functional reserve, estimated as a patients' tolerance to physical load. We concluded that the transition of functional myocardium non-uniformity due to IHD development reflects the exhaust of heart functional reserve.

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