원호형 선배열 트랜스듀서를 이용한 빈사-투과형 역산란 초음파 토모그래피

Reflection - Transmission Type Inverse Scattering Ultrasonic Computed Tomography Using Cirucular Arc Linear Array Transducers

  • 발행 : 2004.05.01

초록

본 연구에서는 원호의 내부벽면에 1열로 배열된 어레이 트랜스듀서를 이용한 반사-투과형 생체진단용 역산란 초음파 단층화상법을 제안하였다. 제안된 방법에서는 대상 물체의 배면에 반사판을 배치하여 경면효과를 이용하였고, 유한 대역을 갖는 펄스파를 송신파로 사용하여 다중 주파수 성분을 이용함으로써 데이터 관측 범위를 줄일 수 있었다. 제안된 방법의 성능 평가를 위하여 컴퓨터 시뮬레이션을 이용한 모의 생체 조직에 대한 유효성을 검토한 격과, 트랜스듀서군의 송수신 각도 범위가 30도로 극히 좁은 범위로 제한되었음에도 불구하고 정량적인 화상재현이 가능함을 확인할 수 있다.

A method of reflection-transmission type ultrasonic inverse scattering image was presented using linearly arrayed transducers in inner surface of half-cylinder. In this method, to reduce the number of data, the mirror effect using a reflector behind object and pulse wave with finite frequency band, To verify the proposed method, a computer simulation was performed for organic phantom specimen, As the results. it was verified that the reconstructed image was satisfactory even when the limitation view angle was limited to around 30 deg.

키워드

참고문헌

  1. Acoustical Holography v.6 Algebraic reconstruction of spatial distributions of acoustic absorption within tissue from their two-dimensional acoustic projections J.F.Greenleaf;S.A.Jonson(et al.)
  2. Proc. IEEE v.67 Reconstructive tomography and application to ultrasonics K.Muller;M.Kaveh;Wade https://doi.org/10.1109/PROC.1979.11284
  3. Principle of Computerized Tomographic Imaging A.C.Kak;M.Slaney
  4. Jpn. J. Appl. Phys. v.39 Inverse scattering image reconstruction from reflection and transmission data observation by the mirror image theory J.S.Kim;A.Yamada https://doi.org/10.1143/JJAP.39.3252
  5. Jpn. J. Appl. Phys. v.40 Inverse scattering image reconstruction from reflection and transmission observation with fixed transmitter/reeiver pair transducer J.S.Kim;A.Yamada https://doi.org/10.1143/JJAP.40.3912
  6. Jpn. J. Appl. Phys. v.41 Inverse scattering image reconstruction based on the multi-frequency reflection and transmission observation data from limited views J.S.Kim;A.Yamada https://doi.org/10.1143/JJAP.41.3592
  7. IEEE Trans. Ultrason. Ferroelectr. Frequ. Control v.48 A k-space method for large-scale models of wave propagation in tissue T.D.Mast;L.P.Souriau;D.L.Liu;M.Tabei;A.I.Nachman;R.C.Wagg https://doi.org/10.1109/58.911717