VHF/UHF range bioultrasonic spectroscopy system and method

Kuskibiki, J.; Akashi, Naoyuki; Sannomiya, T.; Chubachi, Noriyoshi; Dunn, F.

doi:10.1109/58.476547

Cited by 57 publications

(31 citation statements)

References 31 publications

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“…This method requires one transducer connected to a buffer, which again connects with the air or the sample liquid [6]- [9].…”

Section: B the Air/liquid Methodsmentioning

confidence: 99%

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Acoustic methods for obtaining the pressure reflection coefficient from a buffer rod based measurement cell

Bjorndal¹,

Frøysa

2008

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Abstract-The known acoustic methods for obtaining the pressure reflection coefficient from a buffer rod based measurement cell are presented, along with 2 new generic approaches for measuring the pressure reflection coefficient using 2 buffer rods enclosing the liquid to be characterized in a symmetrical arrangement. An acoustic transducer is connected to each of the buffer rods. The generic approaches are divided into a relative amplitude approach and a mixed amplitude approach. For the relative amplitude approach, families of 4, 5, or 6 echo signals can be used to obtain the pressure reflection coefficient. The mixed amplitude approach uses specific information about the transducers and/or the electronics sensitivities in receive mode to obtain the pressure reflection coefficient using families of 3, 4, 5, or 6 echo signals. Some of the new methods from the relative amplitude approach imply a reduced uncertainty relative to the previously known ABC method. The effect of the liquid attenuation, digitizer bit resolution, and the signal-to-noise ratio on the uncertainty characteristics of the pressure reflection coefficient are discussed, along with a discussion of the suitability of the various methods for different buffer materials.

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“…This method requires one transducer connected to a buffer, which again connects with the air or the sample liquid [6]- [9].…”

Section: B the Air/liquid Methodsmentioning

confidence: 99%

“…Quite a few methods for the measurement of the reflection coefficient in connection with buffers are known. One method designated here as the air/liquid method [6]- [9] uses a transducer in pulse-echo mode with the transducer element fixed to a buffer. Then, during the calibration phase, 2 measurements are needed.…”

Section: Introductionmentioning

confidence: 99%

Acoustic methods for obtaining the pressure reflection coefficient from a buffer rod based measurement cell

Bjorndal¹,

Frøysa

2008

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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“…Kushibiki et al (1995) applied a one-pulse RRM to investigate the acoustic properties of biological tissue and liquid specimen. Instead of air, water was used as the reference medium.…”

Section: Reference Reflection Methods (Rrm)mentioning

confidence: 99%

Ultrasound-based density determination via buffer rod techniques: a review

Hoche¹,

Hussein²,

Becker³

2013

J. Sens. Sens. Syst.

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Abstract. The review presents the fundamental ideas, assumptions and methods of non-invasive density measurements via ultrasound at solid-liquid interface. Since the first investigations in the 1970s there has been steady progress with regard to both the technological and methodical aspects. In particular, the technology in electronics has reached such a high level that industrial applications come within reach. In contrast, the accuracies have increased slowly from 1-2 % to 0.15 % for constant temperatures and to 0.4 % for dynamic temperature changes. The actual work reviews all methodical aspects, and highlights the lack of clarity in major parts of the measurement principle: simplifications in the physical basics, signal generation and signal processing. With respect to process application the accuracy of the temperature measurement and the presence of temperature gradients have been identified as a major source of uncertainty. In terms of analytics the main source of uncertainty is the reflection coefficient, and as a consequence of this, the amplitude accuracy in time or frequency domain.

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“…Longitudinal and shear wave velocities of water were reported as 1492.6 m/s (Kushibiki et al, 1995) and 35 m/s (Matsumoto et al, 2000), respectively, at 100 MHz. Attenuations of longitudinal and shear wave in the water were also measured to be α/f 2 = 2.26×10 -14 neper·s 2 /m (Kushibiki et al, 1995) and α/f 2 = 2.12×10 -9 neper·s 2 /m, (Matsumoto et al, 2000) respectively.…”

Section: Shear Mode Bulk Acoustic Wave Devices and Sensorsmentioning

confidence: 99%

“…Attenuations of longitudinal and shear wave in the water were also measured to be α/f 2 = 2.26×10 -14 neper·s 2 /m (Kushibiki et al, 1995) and α/f 2 = 2.12×10 -9 neper·s 2 /m, (Matsumoto et al, 2000) respectively. By substituting these values into Eq.…”

Section: Shear Mode Bulk Acoustic Wave Devices and Sensorsmentioning

confidence: 99%

Shear Mode Piezoelectric Thin Film Resonators

Yanagitani¹

2011

Acoustic Waves - From Microdevices to Helioseismology

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VHF/UHF range bioultrasonic spectroscopy system and method

Cited by 57 publications

References 31 publications

Acoustic methods for obtaining the pressure reflection coefficient from a buffer rod based measurement cell

Acoustic methods for obtaining the pressure reflection coefficient from a buffer rod based measurement cell

Ultrasound-based density determination via buffer rod techniques: a review

Shear Mode Piezoelectric Thin Film Resonators

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