Speckle Tracking in Intracardiac Echocardiography for the Assessment of Myocardial Deformation

Yue, Yong; Clark, John W.; Khoury, Dirar S.

doi:10.1109/tbme.2008.2006036

Cited by 31 publications

(3 citation statements)

References 40 publications

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“…In clinical practice, it may prove challenging to manipulate and align the imaging and ablation catheters in close proximity during the procedure. ICE has also been used for mechanical characterization of the myocardium using strain [21], [22] and strain rate imaging[23], [24].…”

Section: Introductionmentioning

confidence: 99%

Cardiac Lesion Mapping <italic>In Vivo</italic> Using Intracardiac Myocardial Elastography

Bunting

Papadacci

Wan

et al. 2018

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Radio frequency (RF) ablation of the myocardium is used to treat various cardiac arrhythmias. The size, spacing, and transmurality of lesions have been shown to affect the success of the ablation procedure; however, there is currently no method to directly image the size and formation of ablation lesions in real time. Intracardiac myocardial elastography (ME) has been previously used to image the decrease in cardiac strain during systole in the ablated region as a result of the lesion formation. However, the feasibility of imaging multiple lesions and identifying the presence of gaps between lesions has not yet been investigated. In this paper, RF ablation lesions ( ) were generated in the left ventricular epicardium in three anesthetized canines. Two sets of two lesions each were created in close proximity to one another with small gaps (1.5 and 4 cm), while one set of two lesions was created directly next to each other with no gap. A clinical intracardiac echocardiography system was programmed to transmit a custom diverging beam sequence at 600 Hz and used to image the ablation site before and after the induction of ablation lesions. Cumulative strains were estimated over systole using a normalized cross-correlational displacement algorithm and a least-squares strain kernel. Afterward, lesions were excised and subjected to tetrazolium chloride staining. Results indicate that intracardiac ME was capable of imaging the reduction in systolic strain associated with the formation of an ablation lesion. Furthermore, lesion sets containing gaps were able to be distinguished from lesion sets created with no gaps. These results indicate that the end-systolic strain measured using intracardiac ME may be used to image the formation of lesions induced during an RF ablation procedure, in order to provide critical assessment of lesion viability during the interventional procedure.

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Section: Introductionmentioning

confidence: 99%

Cardiac Lesion Mapping <italic>In Vivo</italic> Using Intracardiac Myocardial Elastography

Bunting

Papadacci

Wan

et al. 2018

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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“…Another previous study, assessed strain rate from M-mode tissue velocity from ICE imaging in the porcine model [21], but this study presented similar shortcomings as the previous one. Yue et al have assessed myocardial strain in a canine model using speckle tracking on B-mode images [22]. This method suffered nevertheless both from the loss of phase information due to envelope detection and from a low frame rate (30 fps) which affected the quality of motion estimation.…”

Section: Introductionmentioning

confidence: 99%

Intracardiac myocardial elastography in canines and humans in vivo

Grondin

Wan

Gambhir

et al. 2015

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Intracardiac echocardiography (ICE) is a useful imaging modality which is used during radiofrequency (RF) ablation procedures to help identify anatomical structures. Utilizing ICE in adjunct with myocardial elastography (ME) can provide additional information on the mechanical properties of cardiac tissue and provide information on mechanical changes due to ablation. The objective of this study was to demonstrate that ICE can be used at high frame rate using a diverging beam transmit sequence to image myocardial strain and differentiate myocardial tissue properties before, during and after ablation for a clinical ablation procedure. In this feasibility study, three normal canines and eight patients with atrial fibrillation (AF) were studied in vivo. A 5.8-MHz ICE transducer was used to image the heart with a diverging beam transmit method achieving 1200 frames per second (fps). Cumulative axial displacement estimation was performed using 1-D cross-correlation with a window size of 2.7mm and 95% overlap. Axial cumulative strains were estimated in left atrium (LA) and right atrium (RA) using a least-squares estimator with a kernel of 2mm on the axial displacements. In the canine case, radial thickening was detected in the lateral wall and in the interatrial septum during LA emptying. For AF patients, mean absolute strain in the ablated region was lower (6.7±3.1%) than before the ablation (17.4±9.3%) in LA at end LA emptying. In the cavotricuspid isthmus (CTI) region, mean absolute strain magnitude at end RA emptying was found to be higher during ablation (43.0±18.1%) compared to after ablation (33.7±15.8%). Myocardial strains in the LA of an AF patient were approximately 2.6 times lower in the ablated region than before ablation. This initial feasibility may suggest ME as a new imaging modality to be used in adjunct with ICE in RF ablation guidance and lesion monitoring.

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“…It is known that the speckle tracking method is being widely utilized in 2-D echocardiographic image analysis, [3][4][5][6][7][8] although Kallel et al have reported that speckle motion does not perfectly represent tissue motion. 9 Particularly, foregoing researchers have investigated the block-matching based speckle tracking method so as to measure LV torsion using 2-D echocardiographic images; 10,11 but our implementation of the method is different from the previous ones.…”

Section: Introductionmentioning

confidence: 99%

Measurement of left ventricular torsion using block-matching-based speckle tracking for two-dimensional echocardiography

Sun

Wang²,

et al. 2013

J. Electron. Imaging

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Left ventricular (LV) torsion is a sensitive and global index of LV systolic and diastolic function, but how to noninvasively measure it is challenging. Two-dimensional echocardiography and the block-matching based speckle tracking method were used to measure LV torsion. Main advantages of the proposed method over the previous ones are summarized as follows: (1) The method is automatic, except for manually selecting some endocardium points on the end-diastolic frame in initialization step. (2) The diamond search strategy is applied, with a spatial smoothness constraint introduced into the sum of absolute differences matching criterion; and the reference frame during the search is determined adaptively. (3) The method is capable of removing abnormal measurement data automatically. The proposed method was validated against that using Doppler tissue imaging and some preliminary clinical experimental studies were presented to illustrate clinical values of the proposed method.

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Speckle Tracking in Intracardiac Echocardiography for the Assessment of Myocardial Deformation

Cited by 31 publications

References 40 publications

Cardiac Lesion Mapping <italic>In Vivo</italic> Using Intracardiac Myocardial Elastography

Cardiac Lesion Mapping <italic>In Vivo</italic> Using Intracardiac Myocardial Elastography

Intracardiac myocardial elastography in canines and humans in vivo

Measurement of left ventricular torsion using block-matching-based speckle tracking for two-dimensional echocardiography

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