Method and apparatus for ultrasound imaging using acoustic impedance reconstruction

摘要: An ultrasound imaging system employs acoustic impedance reconstruction to produce high-resolution images of anatomical structures, which are virtually free speckle. Determination the profile involves prefiltering incident signal and reflected from specimen be imaged. A time domain window function is applied both signals, an N-point FFT computed for digitized signals obtain spectrums. complex division spectrum by performed transfer function. having a sharp, low-frequency cutoff prior performing inverse estimated impulse response. The individual A-scans calculated response using plane wave Born approximation, involving integration exponentiation By mechanically or electronically scanning transducer along line, series A-scan profiles used two-dimensional, grey-scale B-scan image.