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"Feature-tracking"

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https://www.readbyqxmd.com/read/29783986/impact-of-the-cone-operation-on-left-ventricular-size-function-and-dyssynchrony-in-ebstein-anomaly-a-cardiovascular-magnetic-resonance-study
#1
Rebecca S Beroukhim, Linyuan Jing, David M Harrild, Brandon K Fornwalt, Abba Mejia-Spiegeler, Jonathan Rhodes, Sitaram Emani, Andrew J Powell
BACKGROUND: In addition to tricuspid regurgitation (TR) and right ventricular (RV) enlargement, patients with Ebstein anomaly are at risk for left ventricular (LV) dysfunction and dyssynchrony. We studied the impact of the cone tricuspid valve reconstruction operation on LV size, function, and dyssynchrony. METHODS: All Ebstein anomaly patients who had both pre- and postoperative cardiovascular magnetic resonance (CMR) studies were retrospectively identified. From cine images, RV and LV volumes and ejection fractions (EF) were calculated, and LV circumferential and longitudinal strain were measured by feature tracking...
May 21, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29748699/longitudinal-deformation-of-the-right-ventricle-in-hypoplastic-left-heart-syndrome-a-comparative-study-of-2d-feature-tracking-magnetic-resonance-imaging-and-2d-speckle-tracking-echocardiography
#2
Mona Salehi Ravesh, Carsten Rickers, Finn Jonathan Bannert, David Hautemann, Abdullah Al Bulushi, Dominik Daniel Gabbert, Philip Wegner, Eva Kis, Jan Hinnerk Hansen, Michaeal Jerosch-Herold, H-H Kramer, Jana Logoteta
In hypoplastic left heart syndrome (HLHS), long-term outcome is closely related to right ventricular function. Echocardiography and magnetic resonance imaging (MRI) are routinely used for functional assessment. MRI 2D-tissue feature tracking (2D-FT) allows quantification of myocardial deformation but has not yet been applied to HLHS patients. We sought to investigate the feasibility of this technique and to compare the results to 2D-speckle tracking echocardiography (2D-STE). In routine MRI 2D anatomical four chamber view, cine images were recorded in 55 HLHS patients (median age 4...
May 10, 2018: Pediatric Cardiology
https://www.readbyqxmd.com/read/29747569/systolic-characteristics-and-dynamic-changes-of-the-mitral-valve-in-different-grades-of-ischemic-mitral-regurgitation-insights-from-3d-transesophageal-echocardiography
#3
Caroline Morbach, Diego Bellavia, Stefan Störk, Lissa Sugeng
BACKGROUND: Mitral regurgitation in ischemic heart disease (IMR) is a strong predictor of outcome but until now, pathophysiology is not sufficiently understood and treatment is not satisfying. We aimed to systematically evaluate structural and functional mitral valve leaflet and annular characteristics in patients with IMR to determine the differences in geometric and dynamic changes of the MV between significant and mild IMR. METHODS: Thirty-seven patients with IMR (18 mild (m)MR, 19 significant (moderate+severe) (s)MR) and 33 controls underwent TEE...
May 10, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29733684/mri-feature-tracking-strain-is-prognostic-for-all-cause-mortality-in-al-amyloidosis
#4
Jeffery E Illman, Shivaram P Arunachalam, Arvin Arani, Ian Cheng-Yi Chang, James F Glockner, Angela Dispenzieri, Martha Grogan, Philip A Araoz
OBJECTIVES: Cardiac involvement is a major determinate of mortality in light chain (AL) amyloidosis. Cardiac magnetic resonance imaging (MRI) feature tracking (FT) strain is a new method for measuring myocardial strain. This study retrospectively evaluated the association of MRI FT strain with all-cause mortality in AL amyloidosis. MATERIALS AND METHODS: Seventy-six patients with newly diagnosed AL amyloidosis underwent cardiac MRI. 75 had images suitable for MRI FT strain analysis...
May 7, 2018: Amyloid: the International Journal of Experimental and Clinical Investigation
https://www.readbyqxmd.com/read/29720088/three-dimensional-thoracic-aorta-principal-strain-analysis-from-routine-ecg-gated-computerized-tomography-feasibility-in-patients-undergoing-transcatheter-aortic-valve-replacement
#5
Alessandro Satriano, Zachary Guenther, James A White, Naeem Merchant, Elena S Di Martino, Faisal Al-Qoofi, Carmen P Lydell, Nowell M Fine
BACKGROUND: Functional impairment of the aorta is a recognized complication of aortic and aortic valve disease. Aortic strain measurement provides effective quantification of mechanical aortic function, and 3-dimenional (3D) approaches may be desirable for serial evaluation. Computerized tomographic angiography (CTA) is routinely performed for various clinical indications, and offers the unique potential to study 3D aortic deformation. We sought to investigate the feasibility of performing 3D aortic strain analysis in a candidate population of patients undergoing transcatheter aortic valve replacement (TAVR)...
May 2, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29685551/the-effects-of-flip-angle-optimization-on-the-precision-and-reproducibility-of-feature-tracking-derived-strain-assessment-in-contrast-enhanced-bssfp-cine-images
#6
Daniel L R Kuetting, Andreas Feisst, Darius Dabir, Julian Luetkens, Rami Homsi, Daniel Thomas, Hans H Schild, Alois M Sprinkart
OBJECTIVES: The aim of this study was to investigate whether a flip angle adaptation, which is known to improve SNR and CNR in post contrast SSFP imaging, improves the precision and reproducibility of Feature Tracking (FT) derived strain assessments in post contrast bSSFP imaging. METHODS AND RESULTS: At 1.5T balanced SSFP midventricular short axis cine images were acquired with various flip angles (FA) before (FA = 50°) and 5 min after (FAs = 50°, 80°, 90°, 100°) injection of double dose Gadobutrol...
May 2018: European Journal of Radiology
https://www.readbyqxmd.com/read/29673853/biventricular-dyssynchrony-on-cardiac-magnetic-resonance-imaging-and-its-correlation-with-myocardial-deformation-ventricular-function-and-objective-exercise-capacity-in-patients-with-repaired-tetralogy-of-fallot
#7
Pantelis Kalaitzidis, Stefan Orwat, Aleksander Kempny, Radke Robert, Brigitte Peters, Samir Sarikouch, Philipp Beerbaum, Helmut Baumgartner, Gerhard-Paul Diller
BACKGROUND: Electrical dyssynchrony and prolonged QRS duration are common in patients with repaired tetralogy of Fallot (ToF). It has been linked to increased risk of sudden cardiac death and right ventricular (RV) dysfunction. We investigated myocardial dyssynchrony using cardiac magnetic resonance imaging (CMR) and feature tracking analysis (FT) in this setting and compared it to myocardial deformation, conventional parameters of ventricular dysfunction and clinical parameters. METHODS AND RESULTS: Patients underwent standardized CMR investigations as part of a nationwide study...
April 12, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29669563/a-comparison-of-both-dense-and-feature-tracking-techniques-with-tagging-for-the-cardiovascular-magnetic-resonance-assessment-of-myocardial-strain
#8
J Jane Cao, Nora Ngai, Lynette Duncanson, Joshua Cheng, Kathleen Gliganic, Qizhi Chen
BACKGROUND: Myocardial strain is increasingly recognized as an important assessment for myocardial function. In addition, it also improves outcome prediction. However, there is lack of standardization in strain evaluation by cardiovascular magnetic resonance (CMR). In this study we compared strain values using multiple techniques and multiple vendor products. METHODS: Prospectively recruited patients with cardiomyopathy of diverse etiology (N = 77) and healthy controls (N = 10) underwent CMR on a 1...
April 19, 2018: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/29614750/feature-tracking-for-high-speed-afm-imaging-of-biopolymers
#9
Brett Hartman, Sean B Andersson
The scanning speed of atomic force microscopes continues to advance with some current commercial microscopes achieving on the order of one frame per second and at least one reaching 10 frames per second. Despite the success of these instruments, even higher frame rates are needed with scan ranges larger than are currently achievable. Moreover, there is a significant installed base of slower instruments that would benefit from algorithmic approaches to increasing their frame rate without requiring significant hardware modifications...
March 31, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29559027/cardiac-deformation-parameters-and-rotational-mechanics-by-cardiac-magnetic-resonance-feature-tracking-in-pre-adolescent-male-soccer-players
#10
Łukasz A Małek, Marzena Barczuk-Falęcka, Michał Brzewski
The purpose of the study was to analyse whether prolonged and regular physical training in children leads to changes in myocardial systolic deformation and rotational mechanics. For that purpose, cardiac MRI feature tracking was performed retrospectively in 35 pre-adolescent male soccer players and 20 matched controls. There were no changes in global strain, but left ventricular twist and apical rotation were greater in soccer players, which adds to the features of paediatric athlete's heart.
June 2018: Cardiology in the Young
https://www.readbyqxmd.com/read/29552419/bounded-kalman-filter-method-for-motion-robust-non-contact-heart-rate-estimation
#11
Sakthi Kumar Arul Prakash, Conrad S Tucker
The authors of this work present a real-time measurement of heart rate across different lighting conditions and motion categories. This is an advancement over existing remote Photo Plethysmography (rPPG) methods that require a static, controlled environment for heart rate detection, making them impractical for real-world scenarios wherein a patient may be in motion, or remotely connected to a healthcare provider through telehealth technologies. The algorithm aims to minimize motion artifacts such as blurring and noise due to head movements (uniform, random) by employing i) a blur identification and denoising algorithm for each frame and ii) a bounded Kalman filter technique for motion estimation and feature tracking...
February 1, 2018: Biomedical Optics Express
https://www.readbyqxmd.com/read/29538467/inter-vendor-reproducibility-of-left-and-right-ventricular-cardiovascular-magnetic-resonance-myocardial-feature-tracking
#12
Roman Johannes Gertz, Torben Lange, Johannes Tammo Kowallick, Sören Jan Backhaus, Michael Steinmetz, Wieland Staab, Shelby Kutty, Gerd Hasenfuß, Joachim Lotz, Andreas Schuster
AIM: Since cardiovascular magnetic resonance feature-tracking (CMR-FT) has been demonstrated to be of incremental clinical merit we investigated the interchangeability of global left and right ventricular strain parameters between different CMR-FT software solutions. MATERIAL AND METHODS: CMR-cine images of 10 patients without significant reduction in LVEF and RVEF and 10 patients with a significantly impaired systolic function were analyzed using two different types of FT-software (TomTec, Germany; QStrain, Netherlands)...
2018: PloS One
https://www.readbyqxmd.com/read/29492650/inter-and-intra-ventricular-dyssynchrony-in-the-systemic-right-ventricle-is-a-surrogate-marker-of-major-cardiac-events-in-mildly-symptomatic-patients
#13
Yumi Shiina, Kei Inai, Tatsunori Takahashi, Kota Taniguchi, Eri Watanabe, Kenji Fukushima, Koichiro Niwa, Michinobu Nagao
The aim of the study was to evaluate systemic right ventricular (RV) dyssynchrony in patients with congenitally corrected transposition of the great arteries (CCTGA) and transposition of the great arteries (TGA) with New York Heart Association functional class (NYHA FC) < III. We used cardiac magnetic resonance (CMR) to evaluate the dyssynchrony and assessed whether RV dyssynchrony can be predictive of major cardiac events in their early stages in these patients. We enrolled 71 consecutive, NYHA FC < III patients with systemic RV who underwent CMR between April 1995 and December 2016...
February 28, 2018: Heart and Vessels
https://www.readbyqxmd.com/read/29454776/cardiac-magnetic-resonance-myocardial-feature-tracking-for-optimized-prediction-of-cardiovascular-events-following-myocardial-infarction
#14
Ingo Eitel, Thomas Stiermaier, Torben Lange, Karl-Philipp Rommel, Alexander Koschalka, Johannes T Kowallick, Joachim Lotz, Shelby Kutty, Matthias Gutberlet, Gerd Hasenfuß, Holger Thiele, Andreas Schuster
OBJECTIVES: The aims of the study were to assess the prognostic significance of cardiac magnetic resonance myocardial feature tracking (CMR-FT) in a large multicenter study and to evaluate the most potent CMR-FT predictor of hard clinical events following myocardial infarction (MI). BACKGROUND: CMR-FT is a new method that allows accurate assessment of global and regional circumferential, radial, and longitudinal myocardial strain. The prognostic value of CMR-FT in patients with reperfused MI is unknown...
February 9, 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29430166/riemannian-nonlinear-mixed-effects-models-analyzing-longitudinal-deformations-in-neuroimaging
#15
Hyunwoo J Kim, Nagesh Adluru, Heemanshu Suri, Baba C Vemuri, Sterling C Johnson, Vikas Singh
Statistical machine learning models that operate on manifold-valued data are being extensively studied in vision, motivated by applications in activity recognition, feature tracking and medical imaging. While non-parametric methods have been relatively well studied in the literature, efficient formulations for parametric models (which may offer benefits in small sample size regimes) have only emerged recently. So far, manifold-valued regression models (such as geodesic regression) are restricted to the analysis of cross-sectional data, i...
July 2017: Proceedings
https://www.readbyqxmd.com/read/29402525/atrio-ventricular-deformation-and-heart-failure-in-ebstein-s-anomaly-a-cardiovascular-magnetic-resonance-study
#16
Michael Steinmetz, Marike Broder, Olga Hösch, Pablo Lamata, Shelby Kutty, Johannes T Kowallick, Wieland Staab, Christian Oliver Ritter, Gerd Hasenfuß, Thomas Paul, Joachim Lotz, Andreas Schuster
PURPOSE: We aimed to quantify atrial and ventricular myocardial deformation in Ebstein's Anomaly (EA) in a case-control study with cardiovascular magnetic resonance (CMR) feature tracking and to correlate changes in cardiac performance with the severity of disease and clinical heart failure parameters. MATERIALS AND METHODS: Atrial and ventricular deformation was measured using CMR feature tracking in 30 EA and 20 healthy control subjects. Atrial performance was characterized using longitudinal strain and strain rate parameters for reservoir function, conduit function and booster pump function...
April 15, 2018: International Journal of Cardiology
https://www.readbyqxmd.com/read/29361479/feature-tracking-global-longitudinal-strain-predicts-death-in-a-multicenter-population-of-patients-with-ischemic-and-nonischemic-dilated-cardiomyopathy-incremental-to-ejection-fraction-and-late-gadolinium-enhancement
#17
Simone Romano, Robert M Judd, Raymond J Kim, Han W Kim, Igor Klem, John F Heitner, Dipan J Shah, Jennifer Jue, Brent E White, Raksha Indorkar, Chetan Shenoy, Afshin Farzaneh-Far
OBJECTIVES: The aim of this study was to evaluate the prognostic value of cardiac magnetic resonance (CMR) feature-tracking-derived global longitudinal strain (GLS) in a large multicenter population of patients with ischemic and nonischemic dilated cardiomyopathy. BACKGROUND: Direct assessment of myocardial fiber deformation with GLS using echocardiography or CMR feature tracking has shown promise in providing prognostic information incremental to ejection fraction (EF) in single-center studies...
January 12, 2018: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/29313213/effects-of-hyperaemia-on-left-ventricular-longitudinal-strain-in-patients-with-suspected-coronary-artery-disease-a-first-pass-stress-perfusion-cardiovascular-magnetic-resonance-imaging-study
#18
P Garg, R Aziz, T Al Musa, D P Ripley, P Haaf, J R J Foley, P P Swoboda, G J Fent, L E Dobson, J P Greenwood, S Plein
AIMS: Myocardial perfusion imaging during hyperaemic stress is commonly used to detect coronary artery disease. The aim of this study was to investigate the relationship between left ventricular global longitudinal strain (GLS), strain rate (GLSR), myocardial early (E') and late diastolic velocities (A') with adenosine stress first-pass perfusion cardiovascular magnetic resonance (CMR) imaging. METHODS AND RESULTS: 44 patients met the inclusion criteria and underwent CMR imaging...
February 2018: Netherlands Heart Journal
https://www.readbyqxmd.com/read/29311562/imaging-4d-morphology-and-dynamics-of-mitral-annulus-in-humans-using-cardiac-cine-mr-feature-tracking
#19
Shuang Leng, Shuo Zhang, Meng Jiang, Xiaodan Zhao, Rui Wu, John Allen, Ben He, Ru San Tan, Liang Zhong
Feature tracking in cine cardiac magnetic resonance (CMR) is a quantitative technique to assess heart structure and function. We investigated 4-dimensional (4D) dynamics and morphology of the mitral annulus (MA) using a novel tracking system based on radially rotational long-axis cine CMR series. A total of 30 normal controls and patients with mitral regurgitation were enrolled. The spatiotemporal changes of the MA were characterized by an in-house developed program. Dynamic and morphological parameters extracted from all 18 radial slices were used as references and were compared with those from subsequently generated sub-datasets with different degrees of sparsity...
January 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29283466/improved-segmental-myocardial-strain-reproducibility-using-deformable-registration-algorithms-compared-with-feature-tracking-cardiac-mri-and-speckle-tracking-echocardiography
#20
Jie Wang, Weihao Li, Jiayu Sun, Hong Liu, Yu Kang, Dan Yang, Liuyu Yu, Andreas Greiser, Xiaoyue Zhou, Yuchi Han, Yucheng Chen
BACKGROUND: Segmental myocardial strain using feature tracking (FT) cardiac MRI is not acceptable due to poor reproducibility. PURPOSE: To assess the reproducibility of left ventricle (LV) segmental myocardial strain measured by deformation registration algorithm (DRA). STUDY TYPE: Prospective clinical trial. SUBJECTS: Sixteen healthy volunteers and 28 hypertrophic cardiomyopathy (HCM) patients. FIELD STRENGTH/SEQUENCE: Retrospective ECG gating cardiac MRI imaging was performed at 3...
December 28, 2017: Journal of Magnetic Resonance Imaging: JMRI
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