2001
DOI: 10.1117/12.431153
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<title>Four-dimensional coronary morphology and computational hemodynamics</title>

Abstract: Conventional reconstructions from intravascular ultrasound (IVUS) stack the frames as acquired during the pullback of the catheter to form a straight three-dimensional volume, thus neglecting the vessel curvature and merging images from different heart phases. We are developing a comprehensive system for fusion of the IVUS data with the pullback path as determined from x-ray angiography, to create a geometrically accurate 4-D (3-D plus time) model of the coronary vasculature as basis for computational hemodyna… Show more

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Cited by 19 publications
(18 citation statements)
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“…The angiography and IVUS data are retrospectively ECG-gated and segmented. In order to obtain a 4-D model as a set of 3-D models (one per phase), angiographic and IVUS data corresponding to the end diastole form the phase#0; using constant offsets (in % R -R or in milliseconds from phase#0), further phases are extracted (Wahle et al, 2001). Fusion leads to the 3-D/4-D plain model, consisting of the lumen/plaque and media/adventitia contours oriented relative to the IVUS catheter.…”
Section: Multi-modality Fusion Of X-ray Angiography and Intravascularmentioning
confidence: 99%
“…The angiography and IVUS data are retrospectively ECG-gated and segmented. In order to obtain a 4-D model as a set of 3-D models (one per phase), angiographic and IVUS data corresponding to the end diastole form the phase#0; using constant offsets (in % R -R or in milliseconds from phase#0), further phases are extracted (Wahle et al, 2001). Fusion leads to the 3-D/4-D plain model, consisting of the lumen/plaque and media/adventitia contours oriented relative to the IVUS catheter.…”
Section: Multi-modality Fusion Of X-ray Angiography and Intravascularmentioning
confidence: 99%
“…D 1 is the distance between s 1 and the center of image A and D 2 is the distance between s 2 and the center of image B. According to (2) and (3), (u 1 , v 1 ) and (u 2 , v 2 ) can, respectively, be represented as the function of (x 1 , y 1 , z 1 ) and (x 2 , y 2 , z 2 ). Furthermore, according to (1), (x 2 , y 2 , z 2 ) can be represented with (x 1 , y 1 , z 1 ).…”
Section: Sequential Reconstruction Of Vessel Skeletonsmentioning
confidence: 99%
“…Furthermore, estimation of coronary arterial displacement fields from CAG image sequences is an important step for quantitatively analyzing and evaluating hemodynamic shear stress distribution on arterial vessel wall based on fusion of CAG and intravascular ultrasound (IVUS) image sequences [2,3].…”
Section: Backgrounds and Medical Contextmentioning
confidence: 99%
“…The fusion process automatically locates the IVUS frames along the 3-D pullback path and finds the optimum match of the segmented lumen surface in the IVUS frames with the 3-D lumen surface reconstructed from the angiograms [9]. When the 3-D models of all heart phases are combined [12], the 4-D model describes two tubular surfaces moving in 3-D space. To perform the hemodynamic analyses, the lumen is modeled as a finite-element tetrahedral mesh, as shown in Fig.…”
Section: Spatio-temporal Modeling By Data Fusionmentioning
confidence: 99%