An object-oriented multi-threaded software beamformation toolbox

Jens Munk Hansen, Martin Christian Hemmsen, Jørgen Arendt Jensen

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Abstract

Focusing and apodization are an essential part of signal processing in ultrasound imaging. Although the fun- damental principles are simple, the dramatic increase in computational power of CPUs, GPUs, and FPGAs motivates the development of software based beamformers, which further improves image quality (and the accu- racy of velocity estimation). For developing new imaging methods, it is important to establish proof-of-concept before using resources on real-time implementations. With this in mind, an eective and versatile Matlab toolbox written in C++ has been developed to assist in developing new beam formation strategies. It is a general 3D implementation capable of handling a multitude of focusing methods, interpolation schemes, and parametric and dynamic apodization. Despite being exible, it is capable of exploiting parallelization on a single computer, on a cluster, or on both. On a single computer, it mimics the parallization in a scanner containing multiple beam formers. The focusing is determined using the positions of the transducer elements, presence of virtual sources, and the focus points. For interpolation, a number of interpolation schemes can be chosen, e.g. linear, polyno- mial, or cubic splines. Apodization can be specied by a number of window functions of xed size applied on the individual elements as a function of distance to a reference point, or it can be dynamic with an expanding or contracting aperture to obtain a constant F-number, or both. On a standard PC with an Intel Quad-Core Xeon E5520 processor running at 2.26 GHz, the toolbox can beamform 300:000 points using 700:000 data samples in 3 seconds using a transducer with 192 elements, dynamic apodization in transmit and receive, and cubic splines for interpolation. This is 19 times faster than our previous toolbox.
Original languageEnglish
Title of host publicationProceedings of SPIE Volume
EditorsJan D'hooge, Marvin M. Doyley
Number of pages470
Volume7968
PublisherSPIE - International Society for Optical Engineering
Publication date2011
Pages79680Y-9
ISBN (Print)9780819485106
DOIs
Publication statusPublished - 2011
EventSPIE Medical Imaging : Ultrasonic Imaging, Tomography, and Therapy - Lake Buena Vista, United States
Duration: 13 Feb 201114 Feb 2011

Conference

ConferenceSPIE Medical Imaging : Ultrasonic Imaging, Tomography, and Therapy
CountryUnited States
CityLake Buena Vista
Period13/02/201114/02/2011

Keywords

  • Software
  • Beamformation
  • High-performance computing
  • Medical ultrasound
  • Toolbox

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