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The dependencies of phase velocity and dispersion on trabecular thickness and spacing in trabecular bone-mimicking phantoms
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10.1121/1.1940448
/content/asa/journal/jasa/118/2/10.1121/1.1940448
http://aip.metastore.ingenta.com/content/asa/journal/jasa/118/2/10.1121/1.1940448

Figures

Image of FIG. 1.
FIG. 1.

(a) Side view and (b) top view of experimental setup.

Image of FIG. 2.
FIG. 2.

Measurements (*) of phase velocity vs frequency for phantom with and . A linear least-squares regression fit to the data is also shown (solid line).

Image of FIG. 3.
FIG. 3.

Phase velocity at 500 kHz vs Tb.Th for four phantoms with . Error bars denote standard deviations. A quadratic fit, , is also shown.

Image of FIG. 4.
FIG. 4.

Phase velocity at 500 kHz vs for four phantoms with . Error bars denote standard deviations. A curve fit, , is also shown.

Image of FIG. 5.
FIG. 5.

Phase velocity at 500 kHz vs volume fraction for all seven phantoms. A linear fit, , is also shown.

Image of FIG. 6.
FIG. 6.

The first derivative of phase velocity with respect to frequency, , vs Tb.Th for four phantoms with . Error bars denote standard deviations. A power law fit, is also shown.

Image of FIG. 7.
FIG. 7.

The first derivative of phase velocity with respect to frequency, , vs for four phantoms with . Error bars denote standard deviations.

Image of FIG. 8.
FIG. 8.

The first derivative of phase velocity with respect to frequency, , vs volume fraction for all seven phantoms. A power law fit, is also shown.

Image of FIG. 9.
FIG. 9.

The first derivative of phase velocity with respect to frequency, , vs volume fraction in 30 human calcaneus samples.

Tables

Generic image for table
TABLE I.

Phantom properties. Tb.Th is trabecular (nylon wire) thickness. The variable is the interwire spacing, which is equal to the sum of Tb.Th and Tb.Sp (trabecular separation). The volume fraction (VF) is the fraction of volume occupied by nylon wire. .

Generic image for table
TABLE II.

Estimates of the first derivative of phase velocity with respect to frequency, , in human calcaneus from Nicholson et al. (1996, Table I), Strelitzki and Evans (1996, Table II), Droin et al. (1998, Table I), and Wear (2000a, Table I). is the number of calcaneus samples upon which measurements were based.

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/content/asa/journal/jasa/118/2/10.1121/1.1940448
2005-08-01
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The dependencies of phase velocity and dispersion on trabecular thickness and spacing in trabecular bone-mimicking phantoms
http://aip.metastore.ingenta.com/content/asa/journal/jasa/118/2/10.1121/1.1940448
10.1121/1.1940448
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