keyword
MENU ▼
Read by QxMD icon Read
search

speckle tracking image

keyword
https://www.readbyqxmd.com/read/28107368/multi-channel-optical-coherence-elastography-using-relative-and-absolute-shear-wave-time-of-flight
#1
Eli Elyas, Alex Grimwood, Janine T Erler, Simon P Robinson, Thomas R Cox, Daniel Woods, Peter Clowes, Ramona De Luca, Franco Marinozzi, Jérémie Fromageau, Jeffrey C Bamber
Elastography, the imaging of elastic properties of soft tissues, is well developed for macroscopic clinical imaging of soft tissues and can provide useful information about various pathological processes which is complementary to that provided by the original modality. Scaling down of this technique should ply the field of cellular biology with valuable information with regard to elastic properties of cells and their environment. This paper evaluates the potential to develop such a tool by modifying a commercial optical coherence tomography (OCT) device to measure the speed of shear waves propagating in a three-dimensional (3D) medium...
2017: PloS One
https://www.readbyqxmd.com/read/28101411/simultaneous-multimodal-ophthalmic-imaging-using-swept-source-spectrally-encoded-scanning-laser-ophthalmoscopy-and-optical-coherence-tomography
#2
Joseph D Malone, Mohamed T El-Haddad, Ivan Bozic, Logan A Tye, Lucas Majeau, Nicolas Godbout, Andrew M Rollins, Caroline Boudoux, Karen M Joos, Shriji N Patel, Yuankai K Tao
Scanning laser ophthalmoscopy (SLO) benefits diagnostic imaging and therapeutic guidance by allowing for high-speed en face imaging of retinal structures. When combined with optical coherence tomography (OCT), SLO enables real-time aiming and retinal tracking and provides complementary information for post-acquisition volumetric co-registration, bulk motion compensation, and averaging. However, multimodality SLO-OCT systems generally require dedicated light sources, scanners, relay optics, detectors, and additional digitization and synchronization electronics, which increase system complexity...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28096045/early-detection-of-left-ventricular-dysfunction-in-first-degree-relatives-of-diabetic-patients-by-myocardial-deformation-imaging-the-role-of-endothelial-glycocalyx-damage
#3
Ignatios Ikonomidis, George Pavlidis, Vaia Lambadiari, Fotini Kousathana, Maria Varoudi, Filio Spanoudi, Eirini Maratou, John Parissis, Helen Triantafyllidi, George Dimitriadis, John Lekakis
BACKGROUND: First-degree relatives of type-2 diabetes patients (FDR) present insulin resistance. We investigated whether FDR and dysglycaemic subjects demonstrate abnormal endothelial glycocalyx and LV deformation during postprandial hyperglycemia. METHODS: We studied 40 FDR with normal oral glucose test (OGTT), 40 subjects with abnormal OGTT (dysglycaemic) and 20 subjects with normal OGTT without parental history of diabetes (normoglycaemic). At 0 and 120min of OGTT we measured: a) LV longitudinal strain (LS) of subendocardial, mid-myocardial and subepicardial layers, global LS (GLS), peak twisting (pTw), untwisting velocity (pUtwVel), by speckle tracking echocardiography b) perfused boundary region (PBR) of the sublingual arterial microvessels; high PBR values represent reduced glycocalyx thickness...
January 8, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28075330/building-an-open-source-simulation-platform-of-acoustic-radiation-force-based-breast-elastography
#4
Yu Wang, Bo Peng, Jingfeng Jiang
Ultrasound-based elastography techniques including quasi-static strain elastography (SE), acoustic radiation force Impulse (ARFI) imaging, point shear wave elastography (pSWE) and supersonic shear imaging (SSI) have been used to differentiate breast tumors. The objective of this study is to extend a previously published virtual simulation platform of SE toward acoustic radiation force-based breast elastography. The proposed platform inherited four key components from the previously published virtual SE platform: an ultrasound simulator (Field II), a mesh generator (Tetgen), a finite element (FE) solver (FEBio) and a visualization and data processing package (VTK)...
January 11, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28073593/integrative-cardiopulmonary-ultrasound-for-interstitial-lung-disease-assessment-correlation-between-lung-ultrasound-performance-and-cardiac-involvement
#5
Wei-Wei Zhu, Yi-Dan Li, Hong Li, Xiu-Zhang Lu, Ling-Yun Kong, Xiao-Guang Ye, Qi-Zhe Cai, Lan-Lan Sun, Wei Jiang, Li Wang
The aims of this study were to apply integrative cardiopulmonary ultrasound (thoracic ultrasound) to the evaluation of patients with interstitial lung disease (ILD) and to determine the relationship between lung ultrasound signs and echocardiographic parameters such as systolic pulmonary artery pressure (SPAP) and various right ventricular parameters. ILD patients and healthy controls underwent lung ultrasound (LUS) and echocardiographic tests. In addition to traditional echocardiographic parameters, right ventricular free wall longitudinal strain (RVLS_FW) was measured using 2-D speckle-tracking echocardiography...
January 7, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28057097/-assessment-right-atrial-function-in-patients-with-systemic-lupus-erythematosus-by-speckle-tracking-and-three-dimensional-echocardiography
#6
X Y Ge, L Shao, Z L Zheng
Objective: To evaluate right atrial function in systemic lupus erythematosus (SLE) with normal pulmonary pressure by using two dimensional-speckle tracking imaging (2D-STI) and real-time three-dimensional echocardiography(RT-3DE). Methods: A totoal of 40 patients with SLE and 40 control subjects were collected between December 2011 and May 2014 from Ningbo Medical Treatment Center Lihuili Hospital. Right atrial global longitudinal strain (RAGLS) and all kinds of right atrium volume index (RAVI) were detected...
December 20, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28054208/is-2d-speckle-tracking-echocardiography-useful-for-detecting-and-monitoring-myocardial-dysfunction-in-adult-m-3243a-g-carriers-a-retrospective-pilot-study
#7
S Koene, J Timmermans, G Weijers, P de Laat, C L de Korte, J A M Smeitink, M C H Janssen, L Kapusta
OBJECTIVES: Cardiomyopathy is a common complication of mitochondrial disorders, associated with increased mortality. Two dimensional speckle tracking echocardiography (2DSTE) can be used to quantify myocardial deformation. Here, we aimed to determine the usefulness of 2DSTE in detecting and monitoring subtle changes in myocardial dysfunction in carriers of the 3243A>G mutation in mitochondrial DNA. METHODS: In this retrospective pilot study, 30 symptomatic and asymptomatic carriers of the mitochondrial 3243A>G mutation of whom two subsequent echocardiograms were available were included...
January 4, 2017: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/28048795/su-f-j-226-structural-similarity-based-ultrasound-image-similarity-measurement
#8
Li Zhu, Ruixing Wang, Kele Xu
PURPOSE: We explore a method to measure the global ultrasound image similarity measurement, with the aim to facilitate abnormal region detection and automatic tracking failure re-initialization in the ultrasound image sequences. METHODS: Structural similarity is used in our similarity measurement framework. The classical structural similarity assesses the visual impact of three characteristics of the ultrasound imaging region from three aspects: luminance, contrast and structure...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046050/postsystolic-shortening-is-associated-with-altered-right-ventricular-function-in-children-after-tetralogy-of-fallot-surgical-repair
#9
Radosław Pietrzak, Bożena Werner
: The aim of the study was to determine whether segmental interactions, as expressed by postsystolic shortening (PSS), affects RV mechanics and are connected with impaired systolic and diastolic function in rTOF children. PATIENTS AND METHODS: 55 rTOF adolescent (study group), and 34 healthy volunteers (control group) were examined using classical Doppler flow (Doppler), Tissue Doppler Imaging (TDI) and Speckle Tracking Echocardiography (STE). PSS was found to occur when time to peak (TTP) was longer than pulmonary valve closure time (PVCT)...
2017: PloS One
https://www.readbyqxmd.com/read/28043217/modulation-of-carotid-strain-by-statin-therapy-in-atherosclerosis-patients
#10
Christian Alexander Schaefer, Anna Katharina Blatzheim, Sebastian Gorgonius Passon, Kristin Solveig Pausewang, Nadjib Schahab, Georg Nickenig, Dirk Skowasch, Robert Schueler, Christoph Hammerstingl, Simon Pingel
BACKGROUND: The beneficial effect of statin therapy on the progress of atherosclerotic disease has been demonstrated by numerous studies. Vascular strain imaging is an arising method to evaluate arterial stiffness. Our study examined whether an influence of statin therapy on the vessel wall could be detected by vascular strain imaging. PATIENTS AND METHODS: 88 patients with recently detected atherosclerosis underwent an angiological examination including ankle-brachial index (ABI), pulse wave index (PWI), central puls ewave velocity and duplex ultrasound...
January 3, 2017: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/28031640/rheumatic-heart-disease-predisposing-to-embolic-myocardial-infarction-a-multimodality-imaging-approach
#11
Emanuele Canali, Giuseppe Cannavale, Giulia Conti, Simona Mariani, Fabrizio Proietti
We report a clinical case of a 45-year-old male with a diagnosis of inferior myocardial infarction and previous history of rheumatic fever during his childhood. Coronary angiography demonstrated normal coronary arteries. Transthoracic echocardiogram showed hypokinetic left ventricular inferolateral wall and mitral stenosis; furthermore, speckle tracking analysis revealed reduction of global longitudinal strain involving the inferior wall. A three-dimensional transesophaegeal echocardiography, performed to better characterize the anatomy of the valve and to find possible source of embolic infarct in an enlarged left atrium, showed rheumatic valvular involvement...
December 2016: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/28025463/value-of-3-dimensional-speckle-tracking-echocardiography-in-the-prediction-of-microvascular-obstruction-and-left-ventricular-remodeling-in-patients-with-st-elevation-myocardial-infarction
#12
Akinori Sugano, Yoshihiro Seo, Tomoko Ishizu, Hiroaki Watabe, Masayoshi Yamamoto, Tomoko Machino-Ohtsuka, Yui Takaiwa, Yuki Kakefuda, Hideaki Aihara, Yuko Fumikura, Hidetaka Nishina, Yuichi Noguchi, Kazutaka Aonuma
BACKGROUND: In patients with myocardial infarction (MI), microvascular obstruction (MVO) determined by cardiac magnetic resonance imaging (CMR) is associated with left ventricular (LV) remodeling and worse prognosis.Methods and Results:In 71 patients with ST-segment elevation MI (STEMI) treated by primary percutaneous coronary intervention (PCI), speckle tracking echocardiography (STE) and CMR were performed early after PCI. All patients underwent CMR at 6 months after hospital discharge to assess the occurrence of LV remodeling...
December 27, 2016: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28018834/detailed-measurement-of-wall-strain-with-3d-speckle-tracking-in-the-aortic-root-a-case-of-bionic-support-for-clinical-decision-making
#13
Sebastian Vogt, Konstantinos Karatolios, Andreas Wittek, Christopher Blasé, Anette Ramaswamy, Nikolas Mirow, Rainer Moosdorf
Three-dimensional (3D) wall motion tracking (WMT) based on ultrasound imaging enables estimation of aortic wall motion and deformation. It provides insights into changes in vascular compliance and vessel wall properties essential for understanding the pathogenesis and progression of aortic diseases. In this report, we employed the novel 3D WMT analysis on the ascending aorta aneurysm (AA) to estimate local aortic wall motion and strain in case of a patient scheduled for replacement of the aortic root. Although progression of the diameter indicates surgical therapy, at present we addressed the question for optimal surgical time point...
December 2016: Thoracic and Cardiovascular Surgeon Reports
https://www.readbyqxmd.com/read/28017389/la-strain-categorization-of-lv-diastolic%C3%A2-dysfunction
#14
Amita Singh, Karima Addetia, Francesco Maffessanti, Victor Mor-Avi, Roberto M Lang
OBJECTIVES: This study sought to observe the relationship between left atrial (LA) strain and left ventricular diastolic function and determine whether LA strain could be used to detect diastolic dysfunction (DD) and classify its degree when present. BACKGROUND: The assessment of diastolic function is complex and multiparametric because most conventional parameters do not follow the progression of DD. Strain imaging is an emerging index of LA function, with recent data demonstrating that LA strain is diminished in diastolic heart failure...
December 8, 2016: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/28013283/delayed-and-decreased-lv-untwist-and-unstrain-rate-in-mutation-carriers-for-hypertrophic-cardiomyopathy
#15
Floris Kauer, Bas M van Dalen, Michelle Michels, Arend F L Schinkel, Wim B Vletter, Marjon van Slegtenhorst, Osama I I Soliman, Marcel L Geleijnse
BACKGROUND: The echocardiographic focus to detect abnormalities in genetically hypertrophic cardiomyopathy (HCM) affected subjects without left ventricular (LV) hypertrophy (G+/LVH-) has been on diastolic abnormalities in transmitral flow and longitudinal myocardial function with tissue Doppler imaging. The aim of this study was to assess diastolic LV unstrain and untwist. METHODS AND RESULTS: Forty-one consecutive genotyped family members of HCM patients (mean age 37 ± 11 years, 16 men) and 41 age- and gender-matched healthy volunteers underwent speckle-tracking echocardiography to measure untwist and unstrain...
December 24, 2016: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28004817/assessment-of-myocardial-function-in-elite-athlete-s-heart-at-rest-2d-speckle-tracking-echocardiography-in-korean-elite-soccer-players
#16
Lucy Youngmin Eun, Hyun Wook Chae
The purpose of this study was to investigate Korean elite soccer players' myocardial function using the conventional and advanced speckle tracking imaging to compare the difference with the normal controls. We used 2D echocardiography speckle tracking echocardiography (STE) to evaluate LV regional strain in 29 elite soccer players compared to 29 age-matched healthy controls. Conventional, tissue Doppler, and STI echocardiography was performed, for strain at base and apex, rotation and torsion. There is no difference in longitudinal strain (-17...
December 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27943379/speckle-tracking-imaging-in-normal-stress-echocardiography
#17
Marina Leitman, Vladimir Tyomkin, Eli Peleg, Izhak Zyssman, Simcha Rosenblatt, Edgar Sucher, Vered Gercenshtein, Zvi Vered
OBJECTIVES: Exercise stress echocardiography is a widely used modality for the diagnosis and follow-up of patients with coronary artery disease. During the last decade, speckle tracking imaging has been used increasingly for accurate evaluation of cardiac function. This work aimed to assess speckle-tracking imaging parameters during nonischemic exercise stress echocardiography. METHODS: During 2011 to 2014 we studied 46 patients without history of coronary artery disease, who completed exercise stress echocardiography protocol, had normal left ventricular function, a nonischemic response, and satisfactory image quality...
December 10, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/27932192/dobutamine-stress-echocardiography-speckle-tracking-imaging-in-the-assessment-of-hemodynamic-significance-of-coronary-artery-stenosis-in-patients-with-moderate-and-high-probability-of-coronary-artery-disease
#18
Eglė Rumbinaitė, Diana Žaliaduonytė-Pekšienė, Mindaugas Vieželis, Indrė Čeponienė, Tomas Lapinskas, Rūta Žvirblytė, Jonė Venclovienė, Kristina Morkūnaitė, Augustinas Bielinis, Rimvydas Šlapikas, Jolanta Justina Vaškelytė
BACKGROUND AND OBJECTIVE: Myocardial deformation indices are considered as sensitive markers of ischemia and may be useful in the quantification of hemodynamic significance of coronary artery disease (CAD). We sought to determine the diagnostic value of speckle-tracking echocardiography derived myocardial deformation parameters at rest and during stress to determine hemodynamically significance coronary artery stenosis in patients with moderate and high probability of CAD. MATERIALS AND METHODS: In 81 patients (mean age, 64±8...
2016: Medicina
https://www.readbyqxmd.com/read/27916237/transesophageal-speckle-tracking-echocardiography-improves-right-ventricular-systolic-function-assessment-in-the-perioperative-setting
#19
Nicholas W Markin, Mohammed Chamsi-Pasha, Jiangtao Luo, Walker R Thomas, Tara R Brakke, Thomas R Porter, Sasha K Shillcutt
BACKGROUND: Perioperative evaluation of right ventricular (RV) systolic function is important to follow intraoperative changes, but it is often not possible to assess with transthoracic echocardiographic (TTE) imaging, because of surgical field constraints. Echocardiographic RV quantification is most commonly performed using tricuspid annular plane systolic excursion (TAPSE), but it is not clear whether this method works with transesophageal echocardiographic (TEE) imaging. This study was performed to evaluate the relationship between TTE and TEE TAPSE distances measured with M-mode imaging and in comparison with speckle-tracking TTE and TEE measurements...
December 1, 2016: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/27916236/strain-imaging-with-a-bull-s-eye-map-for-detecting-significant-coronary-stenosis-during-dobutamine-stress-echocardiography
#20
Li-Tan Yang, Yuichiro Kado, Yasufumi Nagata, Kyoko Otani, Yutaka Otsuji, Masaaki Takeuchi
BACKGROUND: Accurate visual assessment of wall motion during dobutamine stress echocardiography (DSE) requires expertise; strain stress echocardiography thus has potential for the objective and reliable evaluation of stress-induced wall motion abnormalities. The aim of this study was to test the hypothesis that strain imaging also requires expertise. Diagnostic accuracy for significant coronary artery disease was compared between visual and strain analysis with a bull's-eye map, and the effect of expertise on readers' accuracy during DSE was determined...
December 1, 2016: Journal of the American Society of Echocardiography
keyword
keyword
119989
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"