The angle of incidence of the ultrasonic beam: A critical factor for the image quality in intravascular ultrasonography

Mario, Carlo Di; Madretsma, Stanley; Linker, David T.; Bom, N.; Serruys, Patrick W.; Gussenhoven, Elma J.; Roelandt, Jos R.T.C.

doi:10.1016/0002-8703(93)90024-4

Cited by 63 publications

(19 citation statements)

References 20 publications

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“…Nonuniform transducer rotation of mechanical ICUS catheters, eccentric catheter position, or vascular curvatures may affect the accuracy of 3-D reconstruction and analysis [21][22][23]. Approaches that combine both radiographic and ICUS data have been proposed to solve most of these problems, but these techniques are laborious and still restricted to research [21,24].…”

Section: Limitations and Potential Sources Of Errormentioning

confidence: 99%

ECG-gated versus nongated three-dimensional intracoronary ultrasound analysis: Implications for volumetric measurements

Bruining

Birgelen

Feyter

et al. 1998

Cathet. Cardiovasc. Diagn.

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The quantitative analysis of a three‐dimensional (3‐D) intracoronary ultrasound (ICUS) image data set permits a more comprehensive assessment of coronary arterial segments. The 3‐D image sets are generally acquired during continuous motorized pullbacks. However, the cyclic changes of vascular dimensions and the cyclic spatial displacement of the ICUS transducer relative to the vessel wall can result in characteristic image artifacts, which may limit the applicability of quantitative automated analysis systems. This limitation may be overcome by an ECG‐gated image acquisition. In the present study we acquired in vivo (1) nongated and (2) ECG‐gated 3‐D ICUS image sets of 15 human atherosclerotic coronary arteries and performed a computer‐assisted contour detection of the lumen and total vessel boundaries. Total vessel and lumen volumes measured significantly larger in the nongated versus ECG‐gated end‐diastolic image sets (753 ± 307 mm3 vs. 705 ± 305 mm3; 411 ± 154 mm3 vs. 388 ± 165 mm3, both: P < 0.05). Both end‐diastolic and systolic measurements were available in nine arteries, showing a larger total vessel and lumen volume at systole (664 ± 221 mm3 vs. 686 ± 227 mm3, P = 0.03; 384 ± 164 mm3 vs. 393 ± 170 mm3, P = 0.08). The differences observed may be of particular interest for volumetric ICUS studies, addressing presumably small differences in vessel or lumen dimensions. Cathet. Cardiovasc. Diagn. 43:254–260, 1998. © 1998 Wiley‐Liss, Inc.

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Section: Limitations and Potential Sources Of Errormentioning

confidence: 99%

ECG-gated versus nongated three-dimensional intracoronary ultrasound analysis: Implications for volumetric measurements

Bruining

Birgelen

Feyter

et al. 1998

Cathet. Cardiovasc. Diagn.

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“…(12) et al 5 When the incident angle becomes equal or even larger than a critical angle, there is hardly light entering the artery wall, and the transmission ratio will approximate to zero. This results in the appearance of disconnecting tissue along the arterial wall, which has been reported as dissection artifacts in an IVUS study by Mario et al 10 Due to the lack of valid signal, these artifacts cannot be compensated.…”

Section: Hierarchical Linear Regressionmentioning

confidence: 99%

“…Their study concluded that when the distance or the angle toward the luminal wall increases, the intensity will decrease for both intimamedia tissue and adventitia tissue. Earlier work [8][9][10] shows that the reflected ultrasound signal is critically dependent on the angle of incidence and varies for different types of arterial plaques.…”

Section: Introductionmentioning

confidence: 99%

Analysis and compensation for the effect of the catheter position on image intensities in intravascular optical coherence tomography

et al. 2016

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, "Analysis and compensation for the effect of the catheter position on image intensities in intravascular optical coherence tomography," J. Abstract. Intravascular optical coherence tomography (IVOCT) is an imaging technique that is used to analyze the underlying cause of cardiovascular disease. Because a catheter is used during imaging, the intensities can be affected by the catheter position. This work aims to analyze the effect of the catheter position on IVOCT image intensities and to propose a compensation method to minimize this effect in order to improve the visualization and the automatic analysis of IVOCT images. The effect of catheter position is modeled with respect to the distance between the catheter and the arterial wall (distance-dependent factor) and the incident angle onto the arterial wall (angle-dependent factor). A light transmission model incorporating both factors is introduced. On the basis of this model, the interaction effect of both factors is estimated with a hierarchical multivariant linear regression model. Statistical analysis shows that IVOCT intensities are significantly affected by both factors with p < 0.001, as either aspect increases the intensity decreases. This effect differs for different pullbacks. The regression results were used to compensate for this effect. Experiments show that the proposed compensation method can improve the performance of the automatic bioresorbable vascular scaffold strut detection. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…Oblique and eccentric positioning and vessel curvature can produce measurement errors by overestimating the CSA of the vessel and by reducing image quality [15,16]. Image interpretation and measurement of vessel dimensions are based on the experience derived from studies comparing IVUS findings to histopathology.…”

Section: Clinical Interpretation and Quantitation Of Ivus Studiesmentioning

confidence: 99%

Use of Intravascular Ultrasound in Clinical Trials

Kuecherer¹

2002

Heart Drug

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Intravascular ultrasound (IVUS) permits detailed, high-resolution tomographic imaging of coronary architecture and enables the characterization of atherosclerotic lesions and plaque distribution. This unique value of IVUS easily explains and justifies why IVUS has found easy access to the clinical repertoire of a standard catheterization laboratory. Despite this fact, the contribution of IVUS findings relative to the total number of procedures performed in clinical catheterization laboratories can be considered small, and IVUS is seen primarily as an optional tool accompanying diagnostic or interventional procedures and as a mandatory tool mostly in angiographically ambiguous ostial or bifurcational lesions. In clinical trials, IVUS is used to assess changes that occur in vascular dimensions (remodeling) and plaque distribution during the disease process, during percutaneous interventions and at follow-up. One of the unique features of IVUS is that it is the only method to study remodeling in vivo. A standard image acquisition protocol is commonly applied to ensure premium quality of images and quantitative data. Motorized pullback devices are necessary to obtain reproducible length and volumetric measurements and provide uniform image acquisition. Ultrasound images are analyzed using manual tracing of acoustic interfaces. Since manual tracing is subjective, objective methods are currently being developed to minimize observer involvement. Fully automated segmentation of luminal and medial-adventitial boundaries has recently been demonstrated, but is still regarded as an experimental method. In the design of stent trials, IVUS is partially used to evaluate the effects of stent deployment on patient outcome. IVUS-guided stent implantation has been shown to result in less frequent clinically driven target vessel revascularization than angiographic guidance alone, although mortality and infarct rate are not affected. A current focus is on serial observation of plaque burden in lipid-lowering therapy.

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The angle of incidence of the ultrasonic beam: A critical factor for the image quality in intravascular ultrasonography

Cited by 63 publications

References 20 publications

ECG-gated versus nongated three-dimensional intracoronary ultrasound analysis: Implications for volumetric measurements

ECG-gated versus nongated three-dimensional intracoronary ultrasound analysis: Implications for volumetric measurements

Analysis and compensation for the effect of the catheter position on image intensities in intravascular optical coherence tomography

Use of Intravascular Ultrasound in Clinical Trials

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