SARUS: A Synthetic Aperture Real-Time Ultrasound System

Jørgen Arendt Jensen, Hans Holten-Lund, Ronnie Thorup Nilsson, Martin Hansen, Ulrik Darling Larsen, Rune Petter Domsten, Borislav Gueorguiev Tomov, Matthias Bo Stuart, Svetoslav Ivanov Nikolov, Michael Johannes Pihl, Yigang Du, Joachim Rasmussen, Morten Fischer Rasmussen

Research output: Contribution to journalJournal articleResearchpeer-review

481 Downloads (Pure)


The Synthetic Aperture Real-time Ultrasound System (SARUS) for acquiring and processing synthetic aperture (SA) data for research purposes is described. The specifications and design of the system are detailed, along with its performance for SA, nonlinear, and 3-D flow estimation imaging. SARUS acquires individual channel data simultaneously for up to 1024 transducer elements for a couple of heart beats, and is capable of transmitting any kind of excitation. The 64
boards in the system house 16 transmit and 16 receive channels each, where sampled channel data can be stored in 2 GB of RAM and processed using five field-programmable gate arrays (FPGAs). The fully parametric focusing unit calculates delays and apodization values in real time in 3-D space and can
produce 350 million complex samples per channel per second for full non-recursive synthetic aperture B-mode imaging at roughly 30 high-resolution images/s. Both RF element data and beamformed data can be stored in the system for later storage and processing. The stored data can be transferred in parallel using the system’s sixty-four 1-Gbit Ethernet interfaces at a theoretical rate of 3.2 GB/s to a 144-core Linux cluster.
Original languageEnglish
JournalI E E E Transactions on Ultrasonics, Ferroelectrics and Frequency Control
Issue number9
Pages (from-to)1838-1852
Publication statusPublished - 2013


  • Apertures
  • Field programmable gate arrays
  • Focusing
  • Real-time systems
  • Transducers
  • Ultrasonic imaging

Cite this

Jensen, J. A., Holten-Lund, H., Nilsson, R. T., Hansen, M., Larsen, U. D., Domsten, R. P., Tomov, B. G., Stuart, M. B., Nikolov, S. I., Pihl, M. J., Du, Y., Rasmussen, J., & Rasmussen, M. F. (2013). SARUS: A Synthetic Aperture Real-Time Ultrasound System. I E E E Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 60(9), 1838-1852.