نتایج جستجو برای: ecg gated

تعداد نتایج: 53460  

Journal: :AJR. American journal of roentgenology 2009
Wenhui Wu Joseph Budovec W Dennis Foley

OBJECTIVE The objective of our study was to compare radiation dose, contrast load, thoracic aortic attenuation value, and image quality parameters of MDCT thoracic aortography performed with prospective and retrospective cardiac gating. MATERIALS AND METHODS Studies were performed on 80 patients (prospective ECG gating, n = 40; retrospective ECG gating, n = 40) either being evaluated for thor...

Journal: :Aorta 2016
Alan S Chou Bulat A Ziganshin John A Elefteriades

Contrast-enhanced computed tomography (CT) is an effective tool for assessment of thoracic aortic disease in the modern era. Here, we describe a case of Type A aortic dissection incidentally detected by CT in a 63-year old man. Upon more precise imaging with electrocardiography (ECG)-gated CT, the dissection vanished, revealing it to be an aortic motion artifact. This report highlights the impo...

2018
Lei Wang Yushu Chen Bing Zhang Wei Chen Chunhua Wang Li Song Ziqian Xu Jie Zheng Fabao Gao

Objective A failed electrocardiography (ECG)-trigger often leads to a long acquisition time (TA) and deterioration in image quality. The purpose of this study was to evaluate and optimize the technique of self-gated (SG) cardiovascular magnetic resonance (CMR) for cardiac late gadolinium enhancement (LGE) imaging of rats with myocardial infarction/reperfusion. Materials and Methods Cardiovasc...

Journal: :Folia morphologica 2011
M Kantarci I Yuce A Yalcin S Arslan M Bozkurt F Gundogdu

A 19-year-old female patient was admitted to our hospital with dyspnea, chest pain, and shortness of breath. A chest radiograph showed mild cardiomegaly. Echocardiography revealed an extra chamber in the heart. To evaluate this abnormality, ECG-gated 16-detector-row computed tomography angiography was performed. Multidetector computed tomography (MDCT), showing cor triatriatum with total anomal...

Journal: :JACC. Cardiovascular imaging 2015
Rey P Vivo Mahwash Kassi Jerry D Estep Arvind Bhimaraj Barry H Trachtenberg Carlos M Orrego Matthias Loebe Brian A Bruckner Faisal Nabi John J Mahmarian William A Zoghbi Su Min Chang

THE RISING NUMBEROF PATIENTSWITH ADVANCED HEART FAILUREWHO RECEIVE DURABLE MECHANICAL CIRCULATORY SUPPORT (MCS) DEVICES requires improved recognition of device complications (1). Imaging is invariably needed because the clinical presentation is nonspecific. In our institution, we perform both a baseline echocardiographic study and a pump speed optimization test when left ventricular assist devi...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 1991
M W Groch J R Domnanovich W D Erwin A Ali D A Turner

A method to trigger multigated blood-pool (MGBP) acquisition using both the first and second heart sound has been developed. The heart sound gating (HSG) circuitry identifies, individually, both the first (S1) and second (S2) heart sounds from their timing relationship alone, and provides two trigger points during the cardiac cycle. First heart sound gating may be performed to assess the systol...

2011
Alla Gopala Krishna Gokhale Lakshmi Kiran Chelluri K. Kumaresan G. Subramanyam K. Sudhakar Sathish Vemuri Tanya Debnath K. S. Ratnakar

A 62-year-old male patient with previous history of myocardial infarction, akinetic myocardial segments, and an ejection fraction of 31% with the NYHA class III category was selected for the autologous bone marrow (ABM)-derived mononuclear cell fraction injection during CABG surgery. Nitrate augmented myocardial tracer uptake was imaged by ECG gated SPECT pre- and 1 year post-ABM therapy, using...

2015
Tendoh Timoh Ruth P Lim Mary Bruno Gary R McNeal Yutaka Natsuaki Monvadi B Srichai

Background 3D T1-weighted contrast-enhanced MRA (CE-MRA) is routinely used for non-invasive evaluation of the thoracic aorta. However, competing demands of high spatial resolution and fast (breath-hold) acquisition often preclude ECG-gating, leading to motion artifact at the aortic root. Standard Cartesian-sampled ECG-gated CE-MRA acquires 1 partition per heartbeat resulting in long scan times,...

2005
B Hiba M Janier

ECG-gated cardiac MRI in the mouse is hindered by many technical difficulties in ECG signal recording inside static and variable high magnetic scanner fields. The present study proposes an alternative robust method of acquiring auto-gated cine images in mouse heart. In our approach, a motion synchronization signal is extracted from the echo peak MR signal of a nontriggered radial acquisition. T...

Journal: :Journal of Biomechanics 2021

Quantifying local aortic stiffness properties in vivo is acknowledged as essential to assess the severity of an ascending thoracic aneurysm (ATAA). Recently, LESI (local extensional identification) methodology has been established quantify non-invasively ATAAs using electrocardiographic-gated computed tomography (ECG-gated CT) scans. The aim current study was determine most sensitive markers AT...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید