Effects of transducer position on backscattered intensity in coronary arteries

Courtney, Brian K.; Robertson, Abel L.; Maehara, Akiko; Luna-Guerra, Jorge; Kitamura, Katsuhiro; Morino, Yoshihiro; Achalu, Radha; Kirti, Shailaja; Yock, Paul G.; Fitzgerald, Peter J.

doi:10.1016/s0301-5629(01)00474-4

Cited by 20 publications

(12 citation statements)

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“…According to that report, although there was no crossover of IB values between fibrous and fibrofatty within an angle span of 10°, or between fibrous and fatty within an angle span of 14°, this angle-dependence of the ultrasound signal might be partially responsible for the variation of IB values obtained from each tissue component. There was also a report that demonstrated the degree of angle-dependence of 30 MHz ultrasound in detail (Courtney et al, 2002). In that report, the angle-dependence of 30 MHz ultrasound in the www.intechopen.com arterial intima and media was 1.11dB/10°.…”

Section: Limitationsmentioning

confidence: 94%

Integrated Backscatter Intravascular Ultrasound

Kawasaki¹

2012

Intravascular Ultrasound

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Section: Limitationsmentioning

confidence: 94%

Integrated Backscatter Intravascular Ultrasound

Kawasaki¹

2012

Intravascular Ultrasound

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“…Similar region selection criteria have been used by Courtney on IVUS images. 7 The statistical results show that the amount of light that enters the artery wall is significantly related to the catheter position. In the linear model, an anglerelated transmission ratio has been used to model the trend.…”

Section: Hierarchical Linear Regressionmentioning

confidence: 97%

“…Courtney et al 7 showed that the IVUS image intensities are significantly related to the catheter position. 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.…”

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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“…31 According to this report, although there was no crossover of the IB values between fibrous and fibrofatty within an angle span of 10°, or between fibrous and fatty within an angle span of 14°, this angle-dependency of the ultrasound signal might be partially responsible for the variation of IB values obtained for each tissue component. There is a report 32 that demonstrated the degree of angle-dependence of 30-MHz ultrasound in detail: the angle-dependence in the arterial intima and media was 1.11dB/10°. Because we used a 40-MHz catheter, the angle dependence in the arterial tissue would be increased and may decrease the diagnostic accuracy for differentiating the tissue components.…”

Section: Study Limitationsmentioning

confidence: 99%