Partially coherent imaging for large-aperture phased arrays

Details Partially coherent imaging for large-aperture phased arrays Partially coherent imaging for large-aperture phased arrays

1995-02-13

1995-12-19

Manuel, George

Surgery

Truss

Pad

73597, A61B 800

Patent

active

054760984

ABSTRACT:
Ultrasonic imaging performed with a large aperture phased array employs partially coherent processing to provide an improved real-time ultrasound image compared to that obtainable using either fully coherent or fully incoherent processing. Partially coherent processing is achieved by computing different sums across the imaging aperture and using a weighted total of the computed sums to generate a real-time image, enabling the operator to choose the extent of coherent summation versus incoherent summation across the aperture. Since coherent summation affects spatial resolution and incoherent summation affects contrast resolution, a trade-off between spatial and contrast resolution results in an optimal image for a given application.

REFERENCES:
patent: 5278757 (1994-01-01), Hoctor et al.
patent: 5345939 (1994-09-01), Engeler et al.
patent: 5388461 (1995-02-01), Rigby
O'Donnell et al., "Optimum Displacement for Compound Image Generation in Medical Ultrasound", IEEE Trans. on Ultrasonics, Ferroelectronics and Frequency Control, vol. 35, No. 4, pp. 470-476.

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