Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

A prototype low-cost handheld ultrasound imaging system

[+] Author Affiliations
Karthik Ranganathan, Mary K. Santy, Michael I. Fuller, Shiwei Zhou, Travis N. Blalock, John A. Hossack, William F. Walker

Univ. of Virginia (USA)

Proc. SPIE 5373, Medical Imaging 2004: Ultrasonic Imaging and Signal Processing, 24 (April 28, 2004); doi:10.1117/12.537724
Text Size: A A A
From Conference Volume 5373

  • Medical Imaging 2004: Ultrasonic Imaging and Signal Processing
  • William F. Walker; Stanislav Y. Emelianov
  • San Diego, CA | February 14, 2004

abstract

We describe a very low cost handheld ultrasound system that we are currently developing for routine applications such as image guided needle insertion. We provide a system overview and focus discussion on our beamforming strategy, direct sampled I/Q (DSIQ) beamforming. DSIQ beamforming is a low cost approach that relies on phase rotation of in-phase/quadrature (I/Q) data to implement focusing. The I/Q data are generated by directly sampling the received radio frequency (RF) signal, rather than through conventional baseband demodulation. We describe our efficient hardware implementation of the beamformer, which results in significant reductions in beamformer size and cost. We also present the results of experiments and simulations that compare the DSIQ beamformer to more conventional approaches, namely time delay beamforming and traditional complex demodulated I/Q beamforming. Results that show the effect of an error in the direct sampling process, as well as dependence on signal bandwidth and system f number (f#) are presented. These results indicate that the image quality and robustness of the DSIQ beamformer are adequate for routine applications.

© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Karthik Ranganathan ; Mary K. Santy ; Michael I. Fuller ; Shiwei Zhou ; Travis N. Blalock, et al.
"A prototype low-cost handheld ultrasound imaging system", Proc. SPIE 5373, Medical Imaging 2004: Ultrasonic Imaging and Signal Processing, 24 (April 28, 2004); doi:10.1117/12.537724; http://dx.doi.org/10.1117/12.537724


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.