[2] Matthew O′Donnell, L J Thomas. Efficient synthetic aperture imaging from a circular aperture with possible application to catheter-based imaging[J]. IEEE Trans Ultrasonics, Ferroelectrics and Frequency Control, 1992, 39(3): 366-380.
[3] L J Cutrona, W E Vivian, E N Leith, et al.. A high resolution radar combatsurveillance system[J]. IRE Trans Military Electronics, 1961, 5(2): 127-131.
[4] Mustafa Karaman, Pai-Chi Li, Matthew O′ Donnell. Synthetic aperture imaging for small scale systems[J]. IEEE Trans Ultrasonics, Ferroelectrics and Frequency Control, 1995, 42(3): 429-442.
[5] Svetoslav Nikolov, Kim Gammelmark, Jrgen Arendt Jensen.Recursive ultrasound imaging[C]. IEEE Ultrasonics Symposium,1999, 2: 1621-1625.
[6] Jose J Mijares Chan, Jason R B Taylor, G Thomas. Ultrasound high resolution imaging using a modified synthetic aperture focusing method[C]. Manchester: IEEE Int Conf Imaging Systems and Techniques (IST), 2012, 7: 611-615.
[7] Seungsoo Kim, Salavat R Aglyamov, Stanislav Y Emelianov. Display pixel-based synthetic aperture focusing method for intravascular ultrasound imaging[C]. Conf Proc IEEE Eng Med Biol Soc, 2009, 9: 475-478.
[8] Nikolov S I, Jensen J A, Tomov B G. Fast parametric beamformer for synthetic aperture imaging[J]. IEEE Trans Ultrasonics, Ferroelectrics and Frequency Control, 2008, 55(8): 1755-1767.
[9] Bae M H, Jeong M K. A study of synthetic-aperture imaging with virtual source elements in B-mode ultrasound imaging systems[J]. IEEE Tran Ultrasonics, Ferroelectrics and Frequency Control, 2000, 47(6): 1510-1519.
[10] Babak Mohammadzadeh Asl, Ali Mahloojifar. Minimum variance beamforming combined with adaptive coherence weighting applied to medical ultrasound imaging[J]. IEEE Tran Ultrasonics, Ferroelectrics and Frequency Control, 2009, 56(9): 1923-1931.
[11] Iben Kraglund Holfort, Fredrik Gran, Jrgen Arendt Jensen. P2B-12 minimum variance beamforming for high frame-rate ultrasound imaging[C]. IEEE Ultrasonics Symposium, 2007, 10: 1541-1544.
[12] O′Donnell M, Flax S W. Phase-aberration correction using signals from point reflectors and diffuse scatterers: measurements[J]. IEEE Tran Ultrasonics, Ferroelectrics and Frequency Control, 1988, 35(6): 768-774.