title: Generalized sidelobe canceller beamforming method for ultrasound imaging.
abstract: A modified generalized sidelobe canceller (IGSC) algorithm is proposed to enhance the resolution and robustness against the noise of the traditional generalized sidelobe canceller (GSC) and coherence factor combined method (GSC-CF). In the GSC algorithm, weighting vector is divided into adaptive and non-adaptive parts, while the non-adaptive part does not block all the desired signal. A modified steer vector of the IGSC algorithm is generated by the projection of the non-adaptive vector on the signal space constructed by the covariance matrix of received data. The blocking matrix is generated based on the orthogonal complementary space of the modified steer vector and the weighting vector is updated subsequently. The performance of IGSC was investigated by simulations and experiments. Through simulations, IGSC outperformed GSC-CF in terms of spatial resolution by 0.1 mm regardless there is noise or not, as well as the contrast ratio respect. The proposed IGSC can be further improved by combining with CF. The experimental results also validated the effectiveness of the proposed algorithm with dataset provided by the University of Michigan.
authors.affiliation: State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, China.
authors.forename: Na
authors.initials: N
authors.lastname: Li
authors.affiliation: East Inner Mongolia Electric Power Company Limited, Hohhot, China.
authors.forename: Han-Wu
authors.initials: HW
authors.lastname: Luo
authors.affiliation: East Inner Mongolia Electric Power Company Limited, Hohhot, China.
authors.forename: Yong-Kun
authors.initials: YK
authors.lastname: Zhu
authors.affiliation: East Inner Mongolia Electric Power Company Limited, Hohhot, China.
authors.forename: Shi-Gang
authors.initials: SG
authors.lastname: Cui
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D003560:Cysts / Q000000981:diagnostic imaging*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008962:Models, Theoretical; D009038:Motion; D019047:Phantoms, Imaging; D000069453:Ultrasonic Waves; D014463:Ultrasonography / Q000295:instrumentation / Q000379:methods*