Performance of SARUS: A Synthetic Aperture Real-time Ultrasound System

Jørgen Arendt Jensen, Hans Holten-Lund, Ronnie Thorup Nielson, Borislav Gueorguiev Tomov, Matthias Bo Stuart, Svetoslav Ivanov Nikolov, Martin Hansen, Ulrik Darling Larsen

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The SARUS scanner (Synthetic Aperture Real-time Ultrasound System) for research purposes is described. It can acquire individual channel data for multi-element transducers for a couple of heart beats, and is capable of transmitting any kind of excitation. It houses generous and flexible processing resources that can be reprogrammed and tailored to many kinds of algorithms. The 64 boards in the system house 16 transmit and 16 receive channels each, where data can be stored in 2 GB of RAM and processed using four Virtex 4FX100 and one FX60 FPGAs. The VHDL code can acquire data for 16 channels and perform real-time processing for four channels per board. The receive processing chain consists of three FPGAs. The beamformer FPGA houses 24 focusing units (6 x 4-way) each working in parallel at 220 MHz for parallel four-channel beamforming. The fully parametric focusing unit calculates delays and apodization values in real time in 3D space and can produce 630 million complex samples per second. The processing can, thus, beamform 192 image lines consisting of 1024 complex samples for each emission at a rate of 3200 frames a second yielding full nonrecursive synthetic aperture B-mode imaging at more than 30 high resolution images a second.
Original languageEnglish
Title of host publicationProceedings of the 2010 IEEE International Ultrasonics Symposium
Publication date2010
ISBN (Print)978-1-4577-0380-5
Publication statusPublished - 2010
Event2010 IEEE International Ultrasonics Symposium - San Diego, United States
Duration: 11 Oct 201014 Oct 2010


Conference2010 IEEE International Ultrasonics Symposium
Country/TerritoryUnited States
CitySan Diego
Internet address

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