An Optical Fiber-Based Gating Device for Prospective Mouse Cardiac MRI
نویسندگان
چکیده
منابع مشابه
Prospective synchronization of small animal cardiac MRI: a quantitative comparison of an optical device, pressure sensor and ECG
Introduction Prospective synchronization on living organisms of MRI acquisitions to reduce the motion artifacts involves the monitoring of both respiratory and heart motions in the thorax and abdominal region. The signal conventionally used to measure cardiac cycle is the electrocardiograph (ECG) signal. Because of the weak amplitude of the ECG signal recorded on small animals, to obtain an unc...
متن کاملMouse cardiac MRI: comparison of prospective synchronization using optical and ECG signals with a retrospective technique
Introduction Prospective synchronization on living organisms of MRI acquisitions to reduce the motion artifacts involves the monitoring of both respiratory and heart motions in the thorax and abdominal region. The signal conventionally used to measure cardiac cycle is the electrocardiograph (ECG) signal. Respiratory motion can be derived from low frequency modulation of ECG signal [1]. Because ...
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We propose the design of an all-optical 2R regenerator capable of handling multiple wavelength-division-multiplexed channels simultaneously. It extends the known concept of off-center filtering of self-phase-modulation-broadened signal spectra. The novel feature of the proposed device is a dispersion map that strongly suppresses interchannel impairments. The map employs several sections of nonl...
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INTRODUCTION Cardiac motion is a common source of artifacts when imaging the chest with methods such as pulmonary perfusion MRI and pulmonary MR angiography (MRA). To minimize these artifacts, the MR sequence is often ECG-gated such that data are only acquired during a portion of the cardiac cycle when the heart is relatively quiescent; typically during diastole. However, this reduces scan effi...
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Background Cardiac gating in ultra high field (UHF) MRI is a challenging task due to the magnetohydrodynamic (MHD) effect [1]. The MHD effect is particularly severe at such field strengths and severely distorts the electrocardiogram (ECG). State-of-the-art ECG based gating methods which use the vectorcardiogram (VCG) [2] are thus prone to errors [1]. This work presents an approach which separat...
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ژورنال
عنوان ژورنال: IEEE Transactions on Biomedical Engineering
سال: 2014
ISSN: 0018-9294,1558-2531
DOI: 10.1109/tbme.2013.2278712