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BART Streams: Real-Time Reconstruction Using a Modular Framework for Pipeline Processing
Philip Schaten1,2, Moritz Blumenthal1,3, Bernhard Rapp1
1Institute of Biomedical Imaging, Graz University of Technology, Graz, Austria.
Purpose:
To create modular solutions for interactive real-time MRI using reconstruction algorithms implemented in BART.
Methods:
A new protocol for streaming of multidimensional arrays is presented and integrated into BART. The new functionality is demonstrated using examples for cardiac interactive real-time MRI based on radial FLASH, where iterative reconstruction is combined with advanced features such as dynamic coil compression and gradient-delay correction. We analyze the latency of the reconstruction and measure end-to-end latency of the full imaging process.
Results:
Reconstruction pipelines with iterative reconstruction and advanced functionality were built in a modular way using scripting. Latency measurements demonstrate latency sufficient for interactive real-time MRI, on the order of 30 ms for BART processing and network transfer time, or 200 ms for end-to-end latency including acquisition, vendor processing, and display.
Conclusion:
With the new streaming capabilities, real-time reconstruction pipelines can be assembled using BART in a flexible way, enabling rapid prototyping of advanced applications such as interactive real-time MRI.
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