Accurate Three-Dimensional Reconstruction of Intravascular Ultrasound Data

Evans, James L.; Ng, K H; Wiet, Stephen G.; Vonesh, Michael J.; Burns, William B.; Radvany, Martin G.; Kane, Bonnie J.; Davidson, Charles J.; Roth, Sanford I.; Kramer, Barry; Meyers, Sheridan N.; McPherson, David D.

doi:10.1161/01.cir.93.3.567

Cited by 84 publications

(35 citation statements)

References 13 publications

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“…Thus, several groups have introduced 3D transducer navigation or tracking techniques. This can be accomplished by reconstruction of the 3D pullback trajectory with biplane radiographic recordings of the transducer 21 or by real-time tracking of a miniaturized electromagnetic position sensor mounted in the catheter tip ( Figure 6). …”

Section: Evolving Technical Advancements Three-dimensional Image Regimentioning

confidence: 99%

Frontiers in Intravascular Imaging Technologies

Honda

Fitzgerald

2008

Circulation

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I n 1971, Bom et al 1 developed one of the first catheterbased real-time imaging techniques for use in the cardiac system. In placing a set of phased-array ultrasound transducers within the cardiac chambers, Bom and colleagues showed that higher frequencies than those used in transthoracic ultrasound imaging could be used to produce high-resolution images of cardiac structures. By the late 1980s, Yock et al 2 had successfully miniaturized a single-transducer system to enable transducer placement within coronary arteries. Since then, intravascular ultrasound (IVUS) has become a pivotal catheter-based imaging technology, having provided practical guidance for percutaneous interventions and scientific insights into vascular biology in clinical settings. Technical developments currently being explored consist of further device improvements, a variety of advanced image analyses, and the extension of this ultrasound-based approach to diverse intravascular imaging techniques with other energy sources. Principles and Device DevelopmentsUltrasound-Based Approaches IVUS systems produce tomographic images by performing a series of pulse/echo sequences, or vectors, in which an acoustic pulse is emitted and the subsequent reflections from the tissue are detected. Each vector is acquired by directing the ultrasound beam from the catheter in a slightly different direction from the previous vector by mechanical or electrical means. A gray-scale IVUS image is made with all the vectors (commonly 256 vectors), with each vector acquired at a different angle of rotation.Several clinically relevant properties of the ultrasound image, such as the resolution, depth of penetration and attenuation of the acoustic pulse by tissue, are dependent on the geometric and frequency properties of the transducer. A crystal transducer emits a signal that spans a range of frequencies. The higher the center frequency, the better the radial resolution (Figure 1) but the lower the depth of penetration. Conventional IVUS catheters used in the coronary arteries have center frequencies that range from 20 MHz to 40 MHz, thus providing theoretical lower limits of resolution (calculated as half the wavelength) of 39 and 19 m, respectively. In practice, the radial resolution is at least 2 to 5 times poorer, as determined by factors such as the length of the emitted pulse and the position of the imaged structures relative to the transducer.For peripheral and intracardiac echocardiographic (ICE) applications, larger imaging catheters with lower center frequencies (8 to 20 MHz) are produced in both mechanical and electrical configurations. In addition, a phased-array intracardiac echocardiography catheter is available that provides a sector image with color/spectral Doppler and multiple frequency imaging (5.0 to 10 MHz) capabilities. Optical Approaches AngioscopyIntracoronary angioscopy is an endoscopic technology that allows direct visualization of the surface color and superficial morphology of atherosclerotic plaque, thrombus, neointima, or stent struts. The ...

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Section: Evolving Technical Advancements Three-dimensional Image Regimentioning

confidence: 99%

Frontiers in Intravascular Imaging Technologies

Honda

Fitzgerald

2008

Circulation

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“…Some fusion systems require constant angiographic supervision of the catheter during pullback to reconstruct the respective position of the IVUS frame from the projections of the transducer (Evans et al, 1996;Pellot et al, 1996;Shekhar et al, 1996). Instead, just a single pair of angiograms, depicting the IVUS catheter in its most distal location, suffices to reconstruct the pullback path in 3-D and then follow it during the pullback (Laban et al, 1995;.…”

Section: Fusion Of the Image Datamentioning

confidence: 99%

Plaque development, vessel curvature, and wall shear stress in coronary arteries assessed by X-ray angiography and intravascular ultrasound

Wahle

López

Olszewski

et al. 2006

Medical Image Analysis

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The relationships among vascular geometry, hemodynamics, and plaque development in the coronary arteries are complex and not yet well understood. This paper reports a methodology for the quantitative analysis of in vivo coronary morphology and hemodynamics, with particular emphasis placed on the critical issues of image segmentation and the automated classification of disease severity. We were motivated by the observation that plaque more often developed at the inner curvature of a vessel, presumably due to the relatively lower wall shear stress at these locations. The presented studies are based on our validated methodology for the three-dimensional fusion of intravascular ultrasound (IVUS) and X-ray angiography, introducing a novel approach for IVUS segmentation that incorporates a robust, knowledge-based cost function and a fully optimal, threedimensional segmentation algorithm. Our first study shows that circumferential plaque distribution depends on local vessel curvature in the majority of vessels. The second study analyzes the correlation between plaque distribution and wall shear stress in a set of 48 in vivo vessel segments. The results were conclusive for both studies, with a stronger correlation of circumferential plaque thickness with local curvature than with wall shear stress. The inverse relationship between local wall shear stress and plaque thickness was significantly more pronounced (p < 0.025) in vessel cross sections exhibiting compensatory enlargement (positive remodeling) without luminal narrowing than when the full spectrum of disease severity was considered. The inverse relationship was no longer observed in vessels where less than 35% of vessel cross sections remained without luminal narrowing. The findings of this study confirm, in vivo, the hypothesis that relatively lower wall shear stress is associated with early plaque development.

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“…7,8 To determine the required mathematical descriptions, Ն6 noncoplanar 3D calibration points are needed. We used the 8 corner points of the calibration cube, extrapolating these from the cube edges.…”

Section: Reconstruction Of the Catheter Centerline (Coreline)mentioning

confidence: 99%

“…4 -6 More realistic 3D reconstruction methods have been devised that take into account the curved path of the transducer during pullback. 7,8 These methods reconstructed the 3D path from multiple biplane x-ray recordings of successive transducer locations 8 or used the vessel centerline as an approximation. 7 However, some important reconstruction problems related to determination of the true orientation of the IVUS cross sections and susceptibility to respiratory motion remained to be solved.…”

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confidence: 99%

True 3-Dimensional Reconstruction of Coronary Arteries in Patients by Fusion of Angiography and IVUS (ANGUS) and Its Quantitative Validation

et al. 2000

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Background-True 3D reconstruction of coronary arteries in patients based on intravascular ultrasound (IVUS) may be achieved by fusing angiographic and IVUS information (ANGUS). The clinical applicability of ANGUS was tested, and its accuracy was evaluated quantitatively. Methods and Results-In 16 patients who were investigated 6 months after stent implantation, a sheath-based catheter was used to acquire IVUS images during an R-wave-triggered, motorized stepped pullback. First, a single set of end-diastolic biplane angiographic images documented the 3D location of the catheter at the beginning of pullback. From this set, the 3D pullback trajectory was predicted. Second, contours of the lumen or stent obtained from IVUS were fused with the 3D trajectory. Third, the angular rotation of the reconstruction was optimized by quantitative matching of the silhouettes of the 3D reconstruction with the actual biplane images. Reconstructions were obtained in 12 patients. The number of pullback steps, which determines the pullback length, closely agreed with the reconstructed path length (rϭ0.99). Geometric measurements in silhouette images of the 3D reconstructions showed high correlation (0.84 to 0.97) with corresponding measurements in the actual biplane angiographic images. Conclusions-With

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Accurate Three-Dimensional Reconstruction of Intravascular Ultrasound Data

Abstract: These preliminary data support the use of this new method of 3D reconstruction of vascular structures with use of combined vascular ultrasound data and simultaneous ECG-gated biplane cinefluoroscopy.

Cited by 84 publications

References 13 publications

Frontiers in Intravascular Imaging Technologies

Frontiers in Intravascular Imaging Technologies

Plaque development, vessel curvature, and wall shear stress in coronary arteries assessed by X-ray angiography and intravascular ultrasound

True 3-Dimensional Reconstruction of Coronary Arteries in Patients by Fusion of Angiography and IVUS (ANGUS) and Its Quantitative Validation

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