On identification of the arterial model parameters from experiments applicable “in vivo”

Cimrman, Robert; Rohan, Eduard

doi:10.1016/j.matcom.2009.02.006

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…Reconstruction of plaque elasticity is difficult since atherosclerotic lesions are highly heterogeneous; nevertheless, this is a challenge that has been approached by a rather large diversity of methods (Vorp et al 1995, Soualmi et al 1997, Vonesh et al 1997, Beattie et al 1998, Chandran et al 2003, Khalil et al 2006, Cimrman and Rohan 2010, Pazos et al 2010. Generally, elasticity maps (or modulograms) are computed with a priori knowledge on the strain field (or elastogram) of atheromatous plaques and used either direct (Kim et al 2004, Kanai et al 2003 or iterative approaches (Fehrenbach et al 2006, Karimi et al 2008, Baldewsing et al 2008 to minimize the error between measured and computed plaque strains.…”

Section: Introductionmentioning

confidence: 99%

On the potential of a new IVUS elasticity modulus imaging approach for detecting vulnerable atherosclerotic coronary plaques:in vitrovessel phantom study

Floc’h¹,

Cloutier²,

Finet³

et al. 2010

Phys. Med. Biol.

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Peak cap stress amplitude is recognized as a good indicator of vulnerable plaque (VP) rupture. However, such stress evaluation strongly relies on a precise, but still lacking, knowledge of the mechanical properties exhibited by the plaque components. As a first response to this limitation, our group recently developed, in a previous theoretical study, an original approach, called iMOD, which reconstructs elasticity maps (or modulograms) of atheroma plaques from the estimation of strain fields. In the present in vitro experimental study, conducted on PVA-C arterial phantoms, we investigate the benefit of coupling the iMOD procedure with the acquisition of intravascular ultrasound (IVUS) measurements for detection of VP. Our results show that the combined iMOD-IVUS strategy : 1) successfully detected and quantified soft inclusion contours with high positive predictive values and sensitivities of 89.7 ± 3.9% and 81.5 ± 8.8 %, respectively, 2) estimated reasonably cap thicknesses larger than ~300 µm, but underestimated thinner caps, and 3) quantified satisfactorily Young's modulus of hard medium (mean value of 109.7 ± 23.7 kPa instead of 145.4 ± 31.8 kPa), but overestimated the stiffness of soft inclusions (mean Young`s moduli of 31.4 ± 9.7 kPa instead of 17.6 ± 3.4 kPa). All together, these results demonstrate a promising benefit of the new iMOD-IVUS clinical imaging method for in vivo VP detection.

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Section: Introductionmentioning

confidence: 99%

On the potential of a new IVUS elasticity modulus imaging approach for detecting vulnerable atherosclerotic coronary plaques:in vitrovessel phantom study

Floc’h¹,

Cloutier²,

Finet³

et al. 2010

Phys. Med. Biol.

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“…elastogram) obtained from various ultrasound-based techniques (Wan et al 2001; de Korte et al 2002; Kim et al 2004; Maurice et al 2007; Zhang et al 2010; Hu et al 2011) and OCT (Chan 2004; Rogowska et al 2004; van Soest et al 2007) remains a difficult task that has been tackled by a rather large diversity of approaches (Vorp et al 1995; Soualmi et al 1997; Vonesh et al 1997; Beattie et al 1998; Kim et al 2004; Fehrenbach et al 2006; Baldewsing et al 2008; Cimrman and Rohan 2010; Pazos et al 2010; Franquet et al 2011; Doyley 2012). Our group recently proposed a robust IVUS elasticity modulus approach for plaque imaging that combined a dynamic watershed segmentation (DWS) method with an optimization procedure (Le Floc'h et al 2009).…”

Section: Introductionmentioning

confidence: 99%

A Four-Criterion Selection Procedure for Atherosclerotic Plaque Elasticity Reconstruction Based on in Vivo Coronary Intravascular Ultrasound Radial Strain Sequences

Floc’h

Cloutier

Saijo

et al. 2012

Ultrasound in Medicine & Biology

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Plaque elasticity (i.e. modulogram) and morphology are good predictors of plaque vulnerability. Recently, our group developed an intravascular ultrasound (IVUS) elasticity reconstruction method which was successfully implemented in vitro using vessel phantoms. In vivo IVUS modulography, however, remains a major challenge as the motion of the heart prevents accurate strain field estimation. We therefore designed a technique to extract accurate strain fields and modulograms from recorded IVUS sequences. We identified a set of four criteria based on tissue overlapping, RF-correlation coefficient between two successive frames, performance of the elasticity reconstruction method to recover the measured radial strain, and reproducibility of the computed modulograms over the cardiac cycle. This 4-CSP was successfully tested on IVUS sequences obtained in twelve patients referred for a directional coronary atherectomy intervention. This study demonstrates the potential of the IVUS modulography technique based on the proposed 4-CSP to detect vulnerable plaques in vivo.

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Structural and Mechanical Properties of Gastropod Connective and Smooth Muscle Tissue

Kochová

Tonar

2014

Exp Mech

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On identification of the arterial model parameters from experiments applicable “in vivo”

Cited by 5 publications

References 8 publications

On the potential of a new IVUS elasticity modulus imaging approach for detecting vulnerable atherosclerotic coronary plaques:in vitrovessel phantom study

On the potential of a new IVUS elasticity modulus imaging approach for detecting vulnerable atherosclerotic coronary plaques:in vitrovessel phantom study

A Four-Criterion Selection Procedure for Atherosclerotic Plaque Elasticity Reconstruction Based on in Vivo Coronary Intravascular Ultrasound Radial Strain Sequences

Structural and Mechanical Properties of Gastropod Connective and Smooth Muscle Tissue

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