Abstract
Techniques for accurate measurements of peak power, average power, and spatial intensity distribution are described, especially with respect to large surface transducers such as commonly used in acoustical imaging devices. The radiation force technique, using a reflecting target and a microbalance, was used as a primary standard to measure peak and average power. A secondary standard in form of an electronic power meter was developed for displaying average power output. The sound field was mapped at several distances from the transducer by means of a scanning miniature hydrophone, and the intensity field for square and circular transducers was studied theoretically using computer generated field maps.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Woodward, B. et al., “How safe is diagnostic sonar?” Br. J. Radiol., Vol. 43, 1970, p. 719–725.
Dunn, F., Summary paper for session on “Effects on tissue and organs,” Interaction of Ultrasound and Biological Tissues, p. 103–107.
Fry, F.J. and Dunn, F., “Interaction of ultrasound and tissue,” Interaction of Ultrasound and Biological Tissue, p. 109–114.
Myers, G.H. et al., “Preliminary proposal on ultrasonic diagnostic dosimetry measurements,” Interaction of Ultrasound and Biological Tissue, p. 207–210.
Smith, S.W. and Steward, H.F., “A discussion of ultrasonic intensity measurements,” Interaction of Ultrasound and Biological Tissue, p. 211–214.
Kossoff, G., “Calibration of Ultrasonic Therapeutic Equipment,” Acustica, Vol. 12, 1962, p. 84–90.
Borgnis, F.E., “Acoustical radiation pressure of plane compressional waves,” Rev. Mod. Phys., Vol. 25, 1953, p. 653–664.
Rooney, J.A., personal communication.
Sokollu, A., “On the measurement of ultrasound intensity in tissue: Reservations of radiation force and the case for calorimetry,” Interaction of Ultrasound and Biological Tissue, p. 165–170.
Wells, P.N.T. et al., “Milliwatt ultrasonic radio- metry,” Ultrasonics, July-September, 1964.
Hill, C.R. et al., “Calibration of ultrasonic beams for biomedical applications,” Phys. Med. Biol., Vol. 15, No. 2, 1970.
Rooney, J.A., “Determination of acoustic power outputs in the microwatt-milliwatt range,” Ultrasound in Med. & Biol., Vol. 1, 1973, p. 13–16.
Marini, F. and Rivenez, F., “Acoustical fields from rectangular ultrasonic transducers for nondestructive testing and medical diagnosis,” Ultrasonics, November, 1974.
Hill, C.R., “Ultrasound dosimetry,” Interaction of Ultrasound and Biological Tissues, p. 153–158.
Heuter, Th. F. and Bolt, R.H., Sonics, d. 59–72.
Freedman, A., “Sound field of a rectangular piston,” JASA, Vol. 32, February 1960, p. 197–209.
Handbook of mathematical functions, NBS, Applied Mathematics Series 55, ninth printing.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1975 Springer Science+Business Media New York
About this chapter
Cite this chapter
Pedersen, P.C., Christensen, D.A. (1975). Power Measurement Techniques Applied to Imaging Systems. In: Booth, N. (eds) Acoustical Holography. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-8216-8_38
Download citation
DOI: https://doi.org/10.1007/978-1-4615-8216-8_38
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4615-8218-2
Online ISBN: 978-1-4615-8216-8
eBook Packages: Springer Book Archive