Theoretical and numerical aspects of transmit SENSE

The ideas of parallel imaging techniques, designed to shorten the acquisition time by the simultaneous use of multiple receive coils, can be adapted for parallel transmission of a spatially selective multidimensional RF pulse. In analogy to data acquisition, a multidimensional RF pulse follows a cer...

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Bibliographic Details
Published in:IEEE transactions on medical imaging 2004-04, Vol.23 (4), p.520-525
Main Authors: Katscher, U., Bornert, P., van den Brink, J.S.
Format: Article
Language:English
Subjects:
Coils
Computer Simulation
Computer-Aided Design
Data acquisition
Equations
Equipment Design
Equipment Failure Analysis - methods
Feasibility Studies
Image Enhancement - instrumentation
Image Enhancement - methods
Magnetic resonance imaging
Magnetic Resonance Imaging - instrumentation
Magnetic Resonance Imaging - methods
Magnetization
Multidimensional systems
Navigation
Pulse shaping methods
Radio frequency
Signal generators
Signal Processing, Computer-Assisted - instrumentation
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Summary:The ideas of parallel imaging techniques, designed to shorten the acquisition time by the simultaneous use of multiple receive coils, can be adapted for parallel transmission of a spatially selective multidimensional RF pulse. In analogy to data acquisition, a multidimensional RF pulse follows a certain trajectory in k-space. Shortening this trajectory shortens the pulse duration. The use of multiple transmit coils, each with its own time-dependent waveform and spatial sensitivity, compensates for the missing parts of k-space. This results in a maintained spatial definition of the pulse profile while its duration is reduced. This paper describes the basic equations of parallel transmission with arbitrarily shaped transmit coils ("Transmit SENSE") focusing on two-dimensional RF pulses. Results of numerical studies are presented demonstrating the theoretical feasibility of the approach.
ISSN:0278-0062
1558-254X
DOI:10.1109/TMI.2004.824151