A synthetic aperture focusing method for three-way dynamic focusing
A Synthetic Aperture Focusing Method for Three-way Dynamic Focusing
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
A novel synthetic aperture method for real-time three-way dynamic focusing is proposed, which provides lateral beam patterns represented as the product of Fourier transforms of transmit subaperture, receive subaperture, and a synthetic window function. In the proposed method, all array elements are fired individually and for each firing echo signals are recorded from all elements of a receive subaperture moving along an array with the transmit element. The three-way dynamic focusing is then achieved by employing a synthetic aperture algorithm for two-way dynamic focusing and a synthetic focusing method for transmit dynamic focusing. Both theoretical analysis and computer simulation results show that the proposed method produces ultrasound beams with improved lateral resolution at all depths compared to the conventional phased array imaging and synthetic aperture focusing methods.
Abstract
A novel synthetic aperture method for real-time three-way dynamic focusing is proposed, which provides lateral beam patterns represented as the product of Fourier transforms of transmit subaperture, receive subaperture, and a synthetic window function. In the proposed method, all array elements are fired individually and for each firing echo signals are recorded from all elements of a receive subaperture moving along an array with the transmit element. The three-way dynamic focusing is then achieved by employing a synthetic aperture algorithm for two-way dynamic focusing and a synthetic focusing method for transmit dynamic focusing. Both theoretical analysis and computer simulation results show that the proposed method produces ultrasound beams with improved lateral resolution at all depths compared to the conventional phased array imaging and synthetic aperture focusing methods.
참고문헌 (10)
- "Synthetic Receive Aperture Imaging with Phase Correction for Motion and for Tissue Inhomogeneities-Part Ⅰ", 39, pp.489~495 (1992), Basic Principles
- "Synthetic Aperture Techniques with a Virtual Source Element", 45(1), pp.196~207 (1998)
- "Synthetic Aperture Imaging for Small Scale Systems", 42(3), pp.429~442 (1995)
- "Subaperture Processing for Ultrasonic Imaging", 45(1), pp.126~135 (1998)
- "Array Imaging with Spatially-Encoded Transmits", pp.1679~1682 (1997)
- "A Study of Synthetic-Aperture Imaging with Virtual Source Elements in B-Mode Ultrasound Imaging Systems", 47(6), pp.1510~1519 (2000)
- "Real-Time 3-D Ultrasound Imaging Using Sparse Synthetic Aperture Beamforming", 45(4), pp.980~988 (1998)
- "Phase-Aberration Correction Using Signals From Point Reflectors and Diffuse Scatterers", 35, pp.758~767 (1988), Basic Principles
- "Synthetic Receive Aperture Imaging with Phase Correction for Motion and for Tissue Inhomogenities-Part Ⅱ Effects of and Correction for Motion", 39, pp.496~501 (1992)
- "Principals of Aperture and Array System Design. New York" (1976)