Generation of CFD meshes from biplane angiograms: an example of image-based mesh generation and simulation

Quatember, Bernhard; Mühlthaler, Hannes

doi:10.1016/s0168-9274(03)00043-6

Cited by 14 publications

(7 citation statements)

References 23 publications

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“…e quality and quantity of the mesh division will affect the calculation time and calculation accuracy. e unit's complex structure is divided by an unstructured grid with good adaptability, and the mesh of critical parts is locally refined [26]. Different numbers of grids are divided to verify the grid's independence, as shown in Table 3.…”

Section: 2mentioning

confidence: 99%

Research on Multiobjective Optimization of Bulb Tubular Turbine Based on Orthogonal Test

Sun

Zhou

et al. 2021

Shock and Vibration

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The bulb tubular unit has advantages over other units in the low head, large discharge, and tidal energy. The development and utilization of low head and ultralow head hydraulic resources can increase the runner’s energy parameters, make up for the defects of large size and low speed of the unit, and reduce the construction investment. The bulb tubular turbine’s operation stability and structural strength are compared and analyzed by the orthogonal test method to improve the perfomance of bulb tubular turbine. The results show that the optimal design scheme can be obtained when the number of guide vane is 16, the distance between the guide vane and the blade is 1995 mm, the hub ratio is 0.31, the relative twist angle of the blade is 27°, and the cascade density is 0.72. After optimization, the bulb tubular turbine’s efficiency and output are increased by 5.72% and 2.86% at a low flow rate, respectively. The vortex at the tailpipe is reduced, and the blade work effect and the cavitation performance are well. The maximum pressure pulsation amplitude in the flow passage is reduced by 73.15%, the maximum blade deformation is reduced by 39.59%, and the maximum blade static stress is reduced by 13.16%. Finally, the reliability of numerical simulation results is verified by the model test.

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Section: 2mentioning

confidence: 99%

Research on Multiobjective Optimization of Bulb Tubular Turbine Based on Orthogonal Test

Sun

Zhou

et al. 2021

Shock and Vibration

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“…It will serve as the basis for our registration and motion-tracking tasks. For further details of our segmentation method, please refer to [17,20].…”

Section: Reconstruction Of the Skeletonised Epicardial Artery Trees (mentioning

confidence: 99%

Geometric modeling and motion analysis of the epicardial surface of the heart

Quatember

Mayr

Recheis

et al. 2010

Mathematics and Computers in Simulation

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“…Several authors (WAHLE et al, 1995;QUATEMBER and MUEHLTHALER, 2003) have considered the problem of the correct orientation of the ellipse in the face of this systematic loss of information. We defined two radius vectors whose magnitude was equal to the two radii, and the angle between them was equal to the angle between the two image planes.…”

Section: Elliptical Cross-section O F Arteriesmentioning

confidence: 99%

Construction of realistic branched, three-dimensional arteries suitable for computational modelling of flow

Corney

Johnston

Kilpatrick

2004

Med. Biol. Eng. Comput.

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Routinely performed biplane digital coronary angiograms were used to construct a three-dimensional model of the coronary arteries. The technique took the images and automatically picked the centreline and radii in each. By reading the information contained in the DICOM format, the rotation angle between the two images could be ascertained, and the centreline in three dimensions could be determined. Once the centreline and radii had been calculated, a finite volume mesh of the artery was constructed that could be used as input into a fluid dynamics package that solves Navier-Stokes equations. A four-section method was adopted for constructing the mesh, utilising three tubular segments and a small junction section. The tubes were constructed automatically, and the junction procedure was semi-automated, maximising user-control over this region. A structured mesh was used for the tubes, and an unstructured mesh was used to model accurately the irregular shape of the junction. The accuracy of the reconstruction method was established by projection of a mesh onto an independent image of the same artery and the use of a coronary phantom. These tests, along with calibration of the edge detection, established an error of less than 2% in the model.

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Generation of CFD meshes from biplane angiograms: an example of image-based mesh generation and simulation

Cited by 14 publications

References 23 publications

Research on Multiobjective Optimization of Bulb Tubular Turbine Based on Orthogonal Test

Research on Multiobjective Optimization of Bulb Tubular Turbine Based on Orthogonal Test

Geometric modeling and motion analysis of the epicardial surface of the heart

Construction of realistic branched, three-dimensional arteries suitable for computational modelling of flow

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