ECG-triggered snapshot MR imaging of the heart

A method is described for imaging the heart using magnetic resonance (MR) in which a new image is formed in real-time every cardiac cycle. Scan parameters like the electrocardiogram (ECG) trigger delay, enabling/disabling presaturation pulses and interactive adjustment of oblique angulation are cont...

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Bibliographic Details
Main Authors: Liu, Y., Riederer, S.J., Brown, D.G., Wright, R.C., Holsinger, A.E., Grimm, R.C., Ehman, R.L.
Format: Conference Proceeding
Language:English
Subjects:
Blood
Data acquisition
Delay
Electrocardiography
Heart
Image coding
Image reconstruction
Magnetic resonance
Magnetic resonance imaging
Myocardium
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Summary:A method is described for imaging the heart using magnetic resonance (MR) in which a new image is formed in real-time every cardiac cycle. Scan parameters like the electrocardiogram (ECG) trigger delay, enabling/disabling presaturation pulses and interactive adjustment of oblique angulation are controlled by the operator while the scan is proceeding. An image acquisition time under 400 msec is attained via a GRASS pulse sequence using an ultra-short TR time of 8.1 msec, and 48 phase encoding views. Myocardium/blood contrast is enhanced via application of saturation pulses prior to data acquisition. Reconstruction is performed instantaneously using instrumentation developed in the authors' laboratory. Additional equipment modifications enable real-time interactive control of oblique angulation and other imaging parameters.< >
DOI:10.1109/CIC.1990.144239