High-resolution real-time 3-D acoustic imaging system with a reflector

Hirofumi Taki, Toru Sato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Typical acoustic 3-D imaging systems use 1-D transducer array and lenses with fixed focal distance, so the spatial resolution deteriorates in front and behind the focus point. Furthermore, the time resolution is much lower than that of 2-D imaging system. For acoustic real-time 3-D diagnostic imaging systems, we propose a system based on a hybrid array-reflector configuration which realizes high time and spatial resolutions with modest computional load. All elements on a small dense array excite with proper time delays in order to transmit a broad beam similar to that of a single transmitter element. The reflected echo is first focused by a concave reflector, and then received by the same small dense sensor array. Widely distributed images on the array are reconstructed by numerical back projection. With this scheme, images of the whole measuring area can be reconstructed from a single transmit and receive event, which enables a real-time 3-D imaging. The maximum theoretical flame rate is 5000 flames/s, and the number of elements can be reduced to about 1/7 of the dense 2-D array of the synthetic aperture system having the same spatial resolution. This method has higher signal-to-noise ratio than defocused multi-element synthetic aperture methods, overcoming conventional phased array performance.

Original languageEnglish
Title of host publicationProceedings of the 3rd IASTED International Conference on Biomedical Engineering 2005
EditorsM.H. Hamza
Pages112-117
Number of pages6
Publication statusPublished - 2005 Nov 28
Event3rd IASTED International Conference on Medical Engineering 2005 - Innsbruck, Austria
Duration: 2005 Feb 162005 Feb 18

Other

Other3rd IASTED International Conference on Medical Engineering 2005
CountryAustria
CityInnsbruck
Period05/2/1605/2/18

Keywords

  • And real-time
  • Hybrid method
  • Phased array
  • Reflector mirror
  • Synthetic aperture
  • Ultrasound

ASJC Scopus subject areas

  • Engineering(all)

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