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Real-time MR imaging would allow essentially instantaneous viewing
of dynamic processes, interventional procedures, and the
effects of changes to variables associated with MR image quality and
slice positioning.
No dedicated system has been capable of producing
true real-time MRI imaging (reconstructing at least 30
frames per second).
A digital reconstruction system capable of
true real-time Magnetic
Resonance Imaging (MRI) was demonstrated in this project.
The demonstration included contributions to the design
of the system, constructing the system,
interfacing to a MRI acquisition system, writing pulse programs
to produce MRI data, and providing an analysis
of the results.
The system, as configured in this project, reconstructed 128-by-128 pixel
images at 122 frames per second using the
two-dimensional (2-D) fast Fourier transform (FFT)
reconstruction algorithm.
The system consisted of four boards that plug into the
bus of a personal computer (PC).
The PC's purpose was to provide an initial
configuration for the boards, which then performed
their functions independent of the PC.
Real-time MR imaging could be accomplished
with this system when
real-time data acquisition (at least 30
frames per second) is provided.
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