Fast left ventricle tracking using localized anatomical affine optical flow

Queirós, Sandro; Vilaça, João L.; Morais, Pedro; Fonseca, Jaime C.; D’hooge, Jan; Barbosa, Daniel

doi:10.1002/cnm.2871

Cited by 21 publications

(19 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A supplementary constraint based on tissue Doppler can very likely reduce biases. Finally the addition of physiological constraints or deformation models [41] could further reduce errors due to out-of-plane motions, for example.…”

Section: Possible Improvements Of the Optical Flow Methodsmentioning

confidence: 99%

High-Frame-Rate Speckle-Tracking Echocardiography

Joos

Porée

Liebgott

et al. 2018

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

View full text Add to dashboard Cite

Conventional echocardiography is the leading modality for noninvasive cardiac imaging. It has been recently illustrated that high-frame-rate echocardiography using diverging waves could improve cardiac assessment. The spatial resolution and contrast associated with this method are commonly improved by coherent compounding of steered beams. However, owing to fast tissue velocities in the myocardium, the summation process of successive diverging waves can lead to destructive interferences if motion compensation (MoCo) is not considered. Coherent compounding methods based on MoCo have demonstrated their potential to provide high-contrast B-mode cardiac images. Ultrafast speckle-tracking echocardiography (STE) based on common speckle-tracking algorithms could substantially benefit from this original approach. In this paper, we applied STE on high-frame-rate B-mode images obtained with a specific MoCo technique to quantify the 2-D motion and tissue velocities of the left ventricle. The method was first validated in vitro and then evaluated in vivo in the four-chamber view of 10 volunteers. High-contrast high-resolution B-mode images were constructed at 500 frames/s. The sequences were generated with a Verasonics scanner and a 2.5-MHz phased array. The 2-D motion was estimated with standard cross correlation combined with three different subpixel adjustment techniques. The estimated in vitro velocity vectors derived from STE were consistent with the expected values, with normalized errors ranging from 4% to 12% in the radial direction and from 10% to 20% in the cross-range direction. Global longitudinal strain of the left ventricle was also obtained from STE in 10 subjects and compared to the results provided by a clinical scanner: group means were not statistically different ( value = 0.33). The in vitro and in vivo results showed that MoCo enables preservation of the myocardial speckles and in turn allows high-frame-rate STE.

show abstract

Section: Possible Improvements Of the Optical Flow Methodsmentioning

confidence: 99%

High-Frame-Rate Speckle-Tracking Echocardiography

Joos

Porée

Liebgott

et al. 2018

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

View full text Add to dashboard Cite

show abstract

“…2-E). The final ED myocardial segmentation is then propagated frame to frame using a localized anatomical affine optical flow (lAAOF) strategy [25] (Fig. 2-F) and a final refinement of the ES segmentation is performed using first the ES endocardial SSM (Fig.…”

Section: D Left Ventricular Myocardial Segmentationmentioning

confidence: 99%

Non-invasive myocardial performance mapping using 3D echocardiographic stress–strain loops

Pedrosa¹,

Duchenne²,

Queirós³

et al. 2019

Phys. Med. Biol.

Self Cite

View full text Add to dashboard Cite

Regional contribution to left ventricular ejection is of much clinical importance but its assessment is notably challenging. While deformation imaging is often used, this does not take into account loading conditions. Recently, a method for intraventricular pressure estimation was proposed, thus allowing for loading conditions to be taken into account in a non-invasive way. In this work, a method for 3D automatic myocardial performance mapping in echocardiography is proposed by performing 3D myocardial segmentation and tracking, thus giving access to local geometry and strain. This is then used to assess local left ventricular stress-strain relationships which can be seen as a measure of local myocardial work. The proposed method was validated against 18F-fluorodeoxyglucose positron emission tomography, the reference method to clinically assess local metabolism. Averaged over all patients, the mean correlation between FDG-PET and the proposed method was 0.67 ± 0.18. In conclusion, stressstrain loops were, for the first time, estimated from 3D echocardiography and correlated to the clinical gold standard for local metabolism, showing the future potential of RT3DE for the assessment of local metabolic activity of the heart.

show abstract

“…Several methods have been used to estimate the optical flow of the endocardial wall motion [40]. In [41], a global anatomically constrained affine optical flow tracking was used to track the end-diastole left ventricle surface throughout the cardiac cycle. For [42], this approach first performs 3D segmentation at the end-diastolic frame and then performs tracking over the cardiac cycle using both global (optical flow) and local (block matching) methods.…”

Section: Introductionmentioning

confidence: 99%

3D Hermite Transform Optical Flow Estimation in Left Ventricle CT Sequences

Mira

Moya-Albor

Escalante-Ramı́rez

et al. 2020

Sensors

View full text Add to dashboard Cite

Heart diseases are the most important causes of death in the world and over the years, the study of cardiac movement has been carried out mainly in two dimensions, however, it is important to consider that the deformations due to the movement of the heart occur in a three-dimensional space. The 3 D + t analysis allows to describe most of the motions of the heart, for example, the twisting motion that takes place on every beat cycle that allows us identifying abnormalities of the heart walls. Therefore, it is necessary to develop algorithms that help specialists understand the cardiac movement. In this work, we developed a new approach to determine the cardiac movement in three dimensions using a differential optical flow approach in which we use the steered Hermite transform (SHT) which allows us to decompose cardiac volumes taking advantage of it as a model of the human vision system (HVS). Our proposal was tested in complete cardiac computed tomography (CT) volumes ( 3 D + t ), as well as its respective left ventricular segmentation. The robustness to noise was tested with good results. The evaluation of the results was carried out through errors in forwarding reconstruction, from the volume at time t to time t + 1 using the optical flow obtained (interpolation errors). The parameters were tuned extensively. In the case of the 2D algorithm, the interpolation errors and normalized interpolation errors are very close and below the values reported in ground truth flows. In the case of the 3D algorithm, the results were compared with another similar method in 3D and the interpolation errors remained below 0.1. These results of interpolation errors for complete cardiac volumes and the left ventricle are shown graphically for clarity. Finally, a series of graphs are observed where the characteristic of contraction and dilation of the left ventricle is evident through the representation of the 3D optical flow.

show abstract

Fast left ventricle tracking using localized anatomical affine optical flow

Cited by 21 publications

References 61 publications

High-Frame-Rate Speckle-Tracking Echocardiography

High-Frame-Rate Speckle-Tracking Echocardiography

Non-invasive myocardial performance mapping using 3D echocardiographic stress–strain loops

3D Hermite Transform Optical Flow Estimation in Left Ventricle CT Sequences

Contact Info

Product

Resources

About