Study of sidelobe reduction for limited diffraction beams

Jian yu Lu, James F Greenleaf

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

Limited diffraction beams have a large depth of field and are approximately depth-independent, even if they are produced with a finite aperture. Therefore, they may have applications in medical imaging, tissue characterization, nondestructive evaluation of materials, as well as other physical branches such as optics and electromagnetics. However, limited diffraction beams have larger sidelobes than those of conventional beams at their focuses. A method has been proposed for reducing the sidelobes of limited diffraction beams at the expense of frame rate. In this paper, we study the efficacy of the method when stepwise aperture weighting functions are used to produce the beams. Results show that the method works well with a transducer of only 14 rings and 16 sectors. The transducer has a 25 mm diameter and 3.5 MHz central frequency, and can produce a pulse-echo response that maintains a -6-dB mainlobe width of about 1.83 mm over a depth of field of about 150 mm.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE Ultrasonics Symposium
Place of PublicationPiscataway, NJ, United States
PublisherPubl by IEEE
Pages1077-1082
Number of pages6
Volume2
ISBN (Print)0780312783
StatePublished - 1993
EventProceedings of the IEEE 1993 Ultrasonics Symposium - Baltimore, MD, USA
Duration: Oct 31 1993Nov 3 1993

Other

OtherProceedings of the IEEE 1993 Ultrasonics Symposium
CityBaltimore, MD, USA
Period10/31/9311/3/93

Fingerprint

Diffraction
Transducers
Medical imaging
Optics
Tissue

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Lu, J. Y., & Greenleaf, J. F. (1993). Study of sidelobe reduction for limited diffraction beams. In Proceedings of the IEEE Ultrasonics Symposium (Vol. 2, pp. 1077-1082). Piscataway, NJ, United States: Publ by IEEE.

Study of sidelobe reduction for limited diffraction beams. / Lu, Jian yu; Greenleaf, James F.

Proceedings of the IEEE Ultrasonics Symposium. Vol. 2 Piscataway, NJ, United States : Publ by IEEE, 1993. p. 1077-1082.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Lu, JY & Greenleaf, JF 1993, Study of sidelobe reduction for limited diffraction beams. in Proceedings of the IEEE Ultrasonics Symposium. vol. 2, Publ by IEEE, Piscataway, NJ, United States, pp. 1077-1082, Proceedings of the IEEE 1993 Ultrasonics Symposium, Baltimore, MD, USA, 10/31/93.
Lu JY, Greenleaf JF. Study of sidelobe reduction for limited diffraction beams. In Proceedings of the IEEE Ultrasonics Symposium. Vol. 2. Piscataway, NJ, United States: Publ by IEEE. 1993. p. 1077-1082
Lu, Jian yu ; Greenleaf, James F. / Study of sidelobe reduction for limited diffraction beams. Proceedings of the IEEE Ultrasonics Symposium. Vol. 2 Piscataway, NJ, United States : Publ by IEEE, 1993. pp. 1077-1082
@inproceedings{917e11a4a7614c07a305c7a78a52af06,
title = "Study of sidelobe reduction for limited diffraction beams",
abstract = "Limited diffraction beams have a large depth of field and are approximately depth-independent, even if they are produced with a finite aperture. Therefore, they may have applications in medical imaging, tissue characterization, nondestructive evaluation of materials, as well as other physical branches such as optics and electromagnetics. However, limited diffraction beams have larger sidelobes than those of conventional beams at their focuses. A method has been proposed for reducing the sidelobes of limited diffraction beams at the expense of frame rate. In this paper, we study the efficacy of the method when stepwise aperture weighting functions are used to produce the beams. Results show that the method works well with a transducer of only 14 rings and 16 sectors. The transducer has a 25 mm diameter and 3.5 MHz central frequency, and can produce a pulse-echo response that maintains a -6-dB mainlobe width of about 1.83 mm over a depth of field of about 150 mm.",
author = "Lu, {Jian yu} and Greenleaf, {James F}",
year = "1993",
language = "English (US)",
isbn = "0780312783",
volume = "2",
pages = "1077--1082",
booktitle = "Proceedings of the IEEE Ultrasonics Symposium",
publisher = "Publ by IEEE",

}

TY - GEN

T1 - Study of sidelobe reduction for limited diffraction beams

AU - Lu, Jian yu

AU - Greenleaf, James F

PY - 1993

Y1 - 1993

N2 - Limited diffraction beams have a large depth of field and are approximately depth-independent, even if they are produced with a finite aperture. Therefore, they may have applications in medical imaging, tissue characterization, nondestructive evaluation of materials, as well as other physical branches such as optics and electromagnetics. However, limited diffraction beams have larger sidelobes than those of conventional beams at their focuses. A method has been proposed for reducing the sidelobes of limited diffraction beams at the expense of frame rate. In this paper, we study the efficacy of the method when stepwise aperture weighting functions are used to produce the beams. Results show that the method works well with a transducer of only 14 rings and 16 sectors. The transducer has a 25 mm diameter and 3.5 MHz central frequency, and can produce a pulse-echo response that maintains a -6-dB mainlobe width of about 1.83 mm over a depth of field of about 150 mm.

AB - Limited diffraction beams have a large depth of field and are approximately depth-independent, even if they are produced with a finite aperture. Therefore, they may have applications in medical imaging, tissue characterization, nondestructive evaluation of materials, as well as other physical branches such as optics and electromagnetics. However, limited diffraction beams have larger sidelobes than those of conventional beams at their focuses. A method has been proposed for reducing the sidelobes of limited diffraction beams at the expense of frame rate. In this paper, we study the efficacy of the method when stepwise aperture weighting functions are used to produce the beams. Results show that the method works well with a transducer of only 14 rings and 16 sectors. The transducer has a 25 mm diameter and 3.5 MHz central frequency, and can produce a pulse-echo response that maintains a -6-dB mainlobe width of about 1.83 mm over a depth of field of about 150 mm.

UR - http://www.scopus.com/inward/record.url?scp=0027867058&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027867058&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0027867058

SN - 0780312783

VL - 2

SP - 1077

EP - 1082

BT - Proceedings of the IEEE Ultrasonics Symposium

PB - Publ by IEEE

CY - Piscataway, NJ, United States

ER -