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DC Field | Value | Language |
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dc.contributor.author | Milazzo, Stephanie | - |
dc.date.accessioned | 2012-05-23T19:34:14Z | - |
dc.date.available | 2012-05-23T19:34:14Z | - |
dc.date.issued | 2012-05 | - |
dc.identifier.uri | http://hdl.handle.net/10267/13667 | - |
dc.description | The author granted permission for the digitization of this paper. It was submitted by CD. | en_US |
dc.description.abstract | Ultrasound is a well established method for measuring the density of porous bone. Ultrasonic backscatter is one application of this technology. Backscattered power has been found to decrease with bone density. We hypothesized that increased attenuation causes a decrease in the backscattered power. There are two mechanisms of attenuation in porous bone: absorption and scattering of acoustic energy away from the forward direction. To determine the dominant mechanism for attenuation, we measured eight specimens of human and bovine bone ranging in density from 0.142-0.259 g/cc. Measurements were first performed with the specimens in water (with water filling the porous regions) and then in ethanol. By altering the saturating fluid, we altered the scattering properties of the bone, but not the absorption properties. We observed differences in the backscattered signals between water and ethanol measurement trials, but not between attenuation signals. This suggests that the dominant mechanism of attenuation is absorption. | en_US |
dc.description.sponsorship | This paper was read and approved by Drs. Brent Hoffmeister, Ann Viano, and Michael Sheard. | en_US |
dc.publisher | Memphis, Tenn. : Rhodes College | en_US |
dc.rights | Rhodes College owns the rights to the archival digital objects in this collection. Objects are made available for educational use only and may not be used for any non-educational or commercial purpose. Approved educational uses include private research and scholarship, teaching, and student projects. For additional information please contact archives@rhodes.edu. Fees may apply. | - |
dc.subject | Text | - |
dc.subject | Physics, Department of | en_US |
dc.subject | Honors papers | en_US |
dc.subject | Student research | en_US |
dc.title | Mechanisms of Ultrasonic Attenuation in Porous Bone | en_US |
dc.type | Thesis | en_US |
Appears in Collections: | Honors Papers |
Files in This Item:
File | Description | Size | Format | |
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Milazzo_Stephanie_Honors_2012.pdf | 1.9 MB | Adobe PDF | View/Open |
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