Search Results - "Grondin, Julien"

4D cardiac electromechanical activation imaging by Grondin, Julien, Wang, Dafang, Grubb, Christopher S., Trayanova, Natalia, Konofagou, Elisa E.

“…Cardiac abnormalities, a major cause of morbidity and mortality, affect millions of people worldwide. Despite the urgent clinical need for early diagnosis,…”
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Validation of electromechanical wave imaging in a canine model during pacing and sinus rhythm by Grondin, Julien, PhD, Costet, Alexandre, MS, Bunting, Ethan, MS, Gambhir, Alok, MD, PhD, Garan, Hasan, MD, Wan, Elaine, MD, Konofagou, Elisa E., PhD

“…Background Accurate determination of regional areas of arrhythmic triggers is of key interest to diagnose arrhythmias and optimize their treatment…”
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Quantitative ultrasound of cortical bone in the femoral neck predicts femur strength: Results of a pilot study by Grimal, Quentin, Grondin, Julien, Guérard, Sandra, Barkmann, Reinhard, Engelke, Klaus, Glüer, Claus‐C, Laugier, Pascal

“…A significant risk of femoral neck (FN) fracture exists for men and women with an areal bone mineral density (aBMD) higher than the osteoporotic range, as…”
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Relative contributions of porosity and mineralized matrix properties to the bulk axial ultrasonic wave velocity in human cortical bone by Grondin, Julien, Grimal, Quentin, Yamamoto, Kazufumi, Matsukawa, Mami, Saïed, Amena, Laugier, Pascal

“…► Bulk wave velocity measured with quantitative ultrasound (QUS) reflects bone quality. ► We measured velocity at 5MHz, matrix impedance and porosity in four…”
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Abstract 11452: Full 3D Single Heartbeat Electromechanical Wave Imaging of the Heart in Vivo with Coherent Compounding of Diverging Waves by Grondin, Julien, Weber, Rachel, Konofagou, Elisa E

“…IntroductionElectromechanical wave imaging (EWI) is a new ultrasound-based technique that can noninvasively map myocardial activation of all four chambers at…”
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Using singular value distribution of backscattered ultrasound waves for tracking the pulmonary edema caused by COVID-19 in lung: A phantom-based study by Yousefian, Omid, Grondin, Julien, Konofagou, Elisa

“…A condition caused by COVID-19, pulmonary edema is an abnormal buildup of fluid in lungs. B-lines tracking of ultrasound images is a common way to track lung…”
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Cardiac Strain Imaging With Coherent Compounding of Diverging Waves by Grondin, Julien, Sayseng, Vincent, Konofagou, Elisa E.

“…Current methods of cardiac strain imaging at high frame rate suffer from motion matching artifacts or poor lateral resolution. Coherent compounding has been…”
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Myocardial strain imaging with ECG-gated and coherent compounding for early diagnosis of coronary artery disease by Grondin, Julien, Lee, Changhee, Weber, Rachel, Konofagou, Elisa E.

“…Myocardial elastography (ME) is an ultrasound-based technique that uses radiofrequency (RF) signals for 2D cardiac motion tracking and strain imaging at a high…”
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Myocardial Strain Imaging With Electrocardiogram-Gated and Coherent Compounding for Early Diagnosis of Coronary Artery Disease by Grondin, Julien, Lee, Changhee, Weber, Rachel, Konofagou, Elisa E.

“…Myocardial elastography (ME) is an ultrasound-based technique that uses radiofrequency signals for 2-D cardiac motion tracking and strain imaging at a high…”
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Efficient Blood-Brain Barrier Opening in Primates with Neuronavigation-Guided Ultrasound and Real-Time Acoustic Mapping by Wu, Shih-Ying, Aurup, Christian, Sanchez, Carlos Sierra, Grondin, Julien, Zheng, Wenlan, Kamimura, Hermes, Ferrera, Vincent P., Konofagou, Elisa E.

“…Brain diseases including neurological disorders and tumors remain under treated due to the challenge to access the brain, and blood-brain barrier (BBB)…”
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Abstract 14321: A Validation Study of Myocardial Elastography Against Coronary Computed Tomography Angiography in Patients With Coronary Artery Disease by El Harake, Jad, Sayseng, Vincent, Grondin, Julien, Weber, Rachel, Lee, Changhee, Einstein, Andrew J, Konofagou, Elisa

“…IntroductionMyocardial Elastography (ME) is a new quantitative strain imaging method capable of detecting ischemia due to Coronary Artery Disease (CAD). ME has…”
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Compressed sensing reconstruction of synthetic transmit aperture dataset for volumetric diverging wave imaging by Chen, Yinran, Liu, Jing, Grondin, Julien, Konofagou, Elisa E, Luo, Jianwen

“…A high volume rate and high performance ultrasound imaging method based on a matrix array is proposed by using compressed sensing (CS) to reconstruct the…”
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Preliminary Feasibility of Stress Myocardial Elastography for the Detection of Coronary Artery Disease by El Harake, Jad, Sayseng, Vincent, Grondin, Julien, Weber, Rachel, Einstein, Andrew J., Konofagou, Elisa

“…Myocardial elastography (ME) is a cardiac strain imaging technique that has been found capable of detecting a decrease in radial strain caused by ischemia or…”
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A comparison between unfocused and focused transmit strategies in cardiac strain imaging by Sayseng, Vincent, Grondin, Julien, Weber, Rachel A, Konofagou, Elisa

“…Unfocused ultrasound imaging, particularly coherent compounding with diverging waves, is a commonly employed high-frame rate transmit strategy in cardiac…”
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Optimization of Transmit Parameters in Cardiac Strain Imaging With Full and Partial Aperture Coherent Compounding by Sayseng, Vincent, Grondin, Julien, Konofagou, Elisa E.

“…Coherent compounding methods using the full or partial transmit aperture have been investigated as a possible means of increasing strain measurement accuracy…”
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Electromechanical wave imaging (EWI) validation in all four cardiac chambers with 3D electroanatomic mapping in canines in vivo by Costet, Alexandre, Wan, Elaine, Bunting, Ethan, Grondin, Julien, Garan, Hasan, Konofagou, Elisa

“…Characterization and mapping of arrhythmias is currently performed through invasive insertion and manipulation of cardiac catheters. Electromechanical wave…”
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Adaptive Wall Shear Stress Imaging in Phantoms, Simulations and In Vivo by Karageorgos, Grigorios M., Kemper, Paul, Lee, Changhee, Weber, Rachel, Kwon, Nancy, Meshram, Nirvedh, Mobadersany, Nima, Grondin, Julien, Marshall, Randolph S., Miller, Eliza C., Konofagou, Elisa E.

“…WSS measurement is challenging since it requires sensitive flow measurements at a distance close to the wall. The aim of this study is to develop an ultrasound…”
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Non-invasive Characterization of Focal Arrhythmia with Electromechanical Wave Imaging in Vivo by Costet, Alexandre, Wan, Elaine, Melki, Lea, Bunting, Ethan, Grondin, Julien, Garan, Hasan, Konofagou, Elisa

“…There is currently no established method for the non-invasive characterization of arrhythmia and differentiation between endocardial and epicardial triggers at…”
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Evaluation of Coronary Artery Disease Using Myocardial Elastography with Diverging Wave Imaging: Validation against Myocardial Perfusion Imaging and Coronary Angiography by Grondin, Julien, Waase, Marc, Gambhir, Alok, Bunting, Ethan, Sayseng, Vincent, Konofagou, Elisa E

“…Abstract Myocardial elastography (ME) is an ultrasound-based technique that can image 2-D myocardial strains. The objectives of this study were to illustrate…”
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Intracardiac myocardial elastography in canines and humans in vivo by Grondin, Julien, Wan, Elaine, Gambhir, Alok, Garan, Hasan, Konofagou, Elisa

“…Intracardiac echocardiography (ICE) is a useful imaging modality which is used during RF ablation procedures to identify anatomical structures. Utilizing ICE…”
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