10
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Ultrasound transducer and system for real-time simultaneous therapy and diagnosis for noninvasive surgery of prostate tissue.

      IEEE transactions on ultrasonics, ferroelectrics, and frequency control
      Computer Simulation, Humans, Male, Prostate, ultrasonography, Signal Processing, Computer-Assisted, Transducers, Ultrasound, High-Intensity Focused, Transrectal, instrumentation, methods

      Read this article at

      ScienceOpenPublisherPMC
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          For noninvasive treatment of prostate tissue using high-intensity focused ultrasound this paper proposes a design of an integrated multifunctional confocal phased array (IMCPA) and a strategy to perform both imaging and therapy simultaneously with this array. IMCPA is composed of triple-row phased arrays: a 6-MHz array in the center row for imaging and two 4-MHz arrays in the outer rows for therapy. Different types of piezoelectric materials and stack configurations may be employed to maximize their respective functionalities, i.e., therapy and imaging. Fabrication complexity of IMCPA may be reduced by assembling already constructed arrays. In IMCPA, reflected therapeutic signals may corrupt the quality of imaging signals received by the center-row array. This problem can be overcome by implementing a coded excitation approach and/or a notch filter when B-mode images are formed during therapy. The 13-bit Barker code, which is a binary code with unique autocorrelation properties, is preferred for implementing coded excitation, although other codes may also be used. From both Field II simulation and experimental results, we verified whether these remedial approaches would make it feasible to simultaneously carry out imaging and therapy by IMCPA. The results showed that the 13-bit Barker code with 3 cycles per bit provided acceptable performances. The measured -6 dB and -20 dB range mainlobe widths were 0.52 mm and 0.91 mm, respectively, and a range sidelobe level was measured to be -48 dB regardless of whether a notch filter was used. The 13-bit Barker code with 2 cycles per bit yielded -6 dB and -20 dB range mainlobe widths of 0.39 mm and 0.67 mm. Its range sidelobe level was found to be -40 dB after notch filtering. These results indicate the feasibility of the proposed transducer design and system for real-time imaging during therapy.

          Related collections

          Author and article information

          Journal
          19811994
          2760052
          10.1109/TUFFC.2009.1267

          Chemistry
          Computer Simulation,Humans,Male,Prostate,ultrasonography,Signal Processing, Computer-Assisted,Transducers,Ultrasound, High-Intensity Focused, Transrectal,instrumentation,methods

          Comments

          Comment on this article