Title :
Nonlinear Bessel Beam and Its Application in Tissue Harmonic Imaging
Author :
Du, Hong-wei ; Feng, Huan-Qing
Author_Institution :
Dept. of Electron. Sci. & Technol., Univ. of Sci. & Technol. of China, Hefei, China
Abstract :
Bessel beam has a large depth of field and has been applied in high frame rate (HFR) ultrasonic imaging. In order to improve the spatial resolution in HFR imaging, a theoretical and numerical study for the second harmonic component of J0 Bessel beam is presented, based on the nonlinear KZK equation. B-mode fundamental and second harmonic images of scatters in typical tissue-like medium are constructed using a computation imaging model. The result shows that the second harmonic of Bessel beam is limited diffracting and has a narrower mainlobe beyond the near-field. Harmonic imaging with Bessel beam can provide better spatial resolution than fundamental imaging. Thus an imaging method with high time and spatial resolution is feasible.
Keywords :
acoustic signal processing; biomedical ultrasonics; harmonic generation; medical signal processing; nonlinear acoustics; ultrasonic imaging; B-mode fundamental images; Bessel beam second harmonic component; HFR imaging spatial resolution; HFR ultrasonic imaging; Khokhlov-Zabolotskaya-Kuznetsov equation; computational imaging model; high frame rate imaging; nonlinear Bessel beam; nonlinear KZK equation; second harmonic images; tissue harmonic imaging; tissue like medium; Absorption; Apertures; Computational modeling; Diffraction; Focusing; High-resolution imaging; Information science; Nonlinear equations; Spatial resolution; Ultrasonic imaging;
Conference_Titel :
Information Science and Engineering (ICISE), 2009 1st International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4909-5
DOI :
10.1109/ICISE.2009.786
