نتایج جستجو برای: strain imaging

تعداد نتایج: 669097  

Journal: :Medical physics 2010
N Rubert S Bharat R J DeWall A Andreano C Brace J Jiang L Sampson T Varghese

PURPOSE Percutaneous thermal ablation is increasingly being used to destroy hepatic tumors in situ. The success of ablative techniques is highly dependent on adequate ablation zone monitoring, and ultrasound-based strain imaging could become a convenient and cost-effective means to delineate ablation zone boundaries. This study investigates in vivo electrode displacement-based strain imaging fo...

Journal: :European heart journal cardiovascular Imaging 2015
Jens-Uwe Voigt Gianni Pedrizzetti Peter Lysyansky Tom H Marwick Hélène Houle Rolf Baumann Stefano Pedri Yasuhiro Ito Yasuhiko Abe Stephen Metz Joo Hyun Song Jamie Hamilton Partho P Sengupta Theodore J Kolias Jan d'Hooge Gerard P Aurigemma James D Thomas Luigi Paolo Badano

Recognizing the critical need for standardization in strain imaging, in 2010, the European Association of Echocardiography (now the European Association of Cardiovascular Imaging, EACVI) and the American Society of Echocardiography (ASE) invited technical representatives from all interested vendors to participate in a concerted effort to reduce intervendor variability of strain measurement. As ...

2015
Christian T Stoeck Constantin von Deuster Nikola Cesarovic Martin Genet Maximilian Y Emmert Sebastian Kozerke

Background Spin-echo based cardiac diffusion tensor imaging (DTI) is highly sensitive to myocardial strain [1]. Imaging during systolic contraction requires precise planning of the sequence timing [2]. Second order motion compensated diffusion encoding has recently been proposed for small animal imaging [3] to reduce the impact of myocardial strain on the diffusion tensor. It is the objective o...

Journal: :Circulation. Cardiovascular imaging 2008
Geneviève Derumeaux Fumito Ichinose Michael J Raher John G Morgan Tereza Coman Candace Lee Jose Maria Cuesta Hélène Thibault Kenneth D Bloch Michael H Picard Marielle Scherrer-Crosbie

BACKGROUND Aging is accompanied by an alteration in myocardial contractility. However, its noninvasive detection is difficult. The effect of chronic exercise on this decrease is unknown. Murine models of senescence are increasingly used to test therapies in aging. We tested whether strain rate imaging detected left ventricular (LV) systolic dysfunction in aging mice and was able to assess a pot...

Journal: :Current opinion in cardiology 2010
Andre La Gerche Ruxandra Jurcut Jens-Uwe Voigt

PURPOSE OF REVIEW Right ventricular (RV) function is an independent determinant of prognosis in a number of pathologies, but its accurate quantification by echocardiography remains a challenge. With the evolving clinical utility of RV strain and strain imaging, several studies have used it to investigate normal and pathologic conditions. However, marked shape adaptations of the RV and the wide ...

Journal: :Experimental and clinical transplantation : official journal of the Middle East Society for Organ Transplantation 2017
Hazim Alper Gursu Birgul Varan Elif Sade Ilkay Erdogan Atilla Sezgin Sait Aslamaci

OBJECTIVES Asymptomatic rejection after heart transplant is difficult to detect by noninvasive methods. The present study investigated the efficacy of echocardiographic strain and the strain rate imaging method in detecting rejection after pediatric heart transplant. MATERIALS AND METHODS Fourteen pediatric patients with heart transplant were examined both with endomyocardial biopsy and strai...

Journal: :Cellular microbiology 2006
Régis Tournebize Bich-Thuy Doan Marie-Agnès Dillies Sabine Maurin Jean-Claude Beloeil Philippe J Sansonetti

In vivo imaging of small animals is a rapidly developing field. However, the potential of global imaging of infectious processes in animal models remains poorly explored. We used magnetic resonance imaging (MRI) to follow the development and regression of inflammatory lesions caused by infection by Klebsiella pneumoniae in mouse lungs. A virulent strain caused an intense inflammation within 2 d...

Journal: :Circulation. Cardiovascular imaging 2012
Salman Azam Candida L Desjardins Mark Schluchter Anna Liner Julian E Stelzer Xin Yu Brian D Hoit

BACKGROUND Myocardial strain imaging using echocardiography can be a cost-effective method to quantify ventricular wall motion objectively, but few studies have compared strain measured with echocardiography against magnetic resonance imaging (MRI) in small animals. METHODS AND RESULTS We compared circumferential strain (CS) and radial strain (RS) measured with echocardiography (velocity vect...

2010
S. Soleimanifard K. Z. Abd-Elmoniem E. Z. Murano M. R. Abraham T. P. Abraham J. L. Prince

INTRODUCTION: Comprehensive characterization of myocardial viability continues to be of diagnostic interest to clinicians. Magnetic resonance (MR) tagging is considered the gold standard imaging tool for noninvasive assessment of functional viability in the form of mechanical strain tensors [1]. Principal strain orientations, which correspond to directions of maximal deformations (stretching, c...

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