Stability of heterogeneous elastography phantoms made from oil dispersions in aqueous gels
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| Title: | Stability of heterogeneous elastography phantoms made from oil dispersions in aqueous gels |
|---|---|
| Authors: | Madsen, Ernest L. elmadsen@wisc.edu, Hobson, Maritza A.1, Shi, Hairong1, Varghese, Tomy1, Frank, Gary R.1 |
| Source: | Ultrasound in Medicine & Biology. Feb2006, Vol. 32 Issue 2, p261-270. 10p. |
| Subjects: | Imaging phantoms, Tissues -- Models, Body composition models, Safflower oil, Agar, Gelatin |
| Abstract: | Abstract: A set of five tissue-mimicking phantoms with cylindrical inclusions were produced for assessing long-term stability of geometry and elastic properties and assessing accuracy of determination of elastic properties. The base aqueous materials were either gelatin or a mixture of agar and gelatin. Stiffness was controlled by selection of the volume percent consisting of microscopic safflower oil droplets. Cylinder diameters remained unchanged within 1% or 2% over many months. Strain ratios from elastograms of the phantoms were stable over many months, implying that elastic contrasts were also stable. Test samples, called production samples, for measurement of Young’s moduli were made at the time of manufacture of each phantom and were stored separately from one another. Each production sample was homogeneous and consisted of either inclusion material or background material. For all five phantoms, it was found that the elastic contrast computed using Young’s modulus values determined using the production samples accurately represented the true elastic contrasts in the corresponding phantom. This finding was established by the fact that the (true) elastic contrasts determined using samples excised from the phantoms themselves agreed with the elastic contrasts obtained using the homogeneous production samples. (E-mail: elmadsen@wisc.edu) [Copyright &y& Elsevier] |
| Copyright of Ultrasound in Medicine & Biology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 19591957 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Stability of heterogeneous elastography phantoms made from oil dispersions in aqueous gels – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Madsen%2C+Ernest+L%2E%22">Madsen, Ernest L.</searchLink><i> elmadsen@wisc.edu</i><br /><searchLink fieldCode="AR" term="%22Hobson%2C+Maritza+A%2E%22">Hobson, Maritza A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Shi%2C+Hairong%22">Shi, Hairong</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Varghese%2C+Tomy%22">Varghese, Tomy</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Frank%2C+Gary+R%2E%22">Frank, Gary R.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Ultrasound+in+Medicine+%26+Biology%22">Ultrasound in Medicine & Biology</searchLink>. Feb2006, Vol. 32 Issue 2, p261-270. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Imaging+phantoms%22">Imaging phantoms</searchLink><br /><searchLink fieldCode="DE" term="%22Tissues+--+Models%22">Tissues -- Models</searchLink><br /><searchLink fieldCode="DE" term="%22Body+composition+models%22">Body composition models</searchLink><br /><searchLink fieldCode="DE" term="%22Safflower+oil%22">Safflower oil</searchLink><br /><searchLink fieldCode="DE" term="%22Agar%22">Agar</searchLink><br /><searchLink fieldCode="DE" term="%22Gelatin%22">Gelatin</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract: A set of five tissue-mimicking phantoms with cylindrical inclusions were produced for assessing long-term stability of geometry and elastic properties and assessing accuracy of determination of elastic properties. The base aqueous materials were either gelatin or a mixture of agar and gelatin. Stiffness was controlled by selection of the volume percent consisting of microscopic safflower oil droplets. Cylinder diameters remained unchanged within 1% or 2% over many months. Strain ratios from elastograms of the phantoms were stable over many months, implying that elastic contrasts were also stable. Test samples, called production samples, for measurement of Young’s moduli were made at the time of manufacture of each phantom and were stored separately from one another. Each production sample was homogeneous and consisted of either inclusion material or background material. For all five phantoms, it was found that the elastic contrast computed using Young’s modulus values determined using the production samples accurately represented the true elastic contrasts in the corresponding phantom. This finding was established by the fact that the (true) elastic contrasts determined using samples excised from the phantoms themselves agreed with the elastic contrasts obtained using the homogeneous production samples. (E-mail: elmadsen@wisc.edu) [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Ultrasound in Medicine & Biology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.ultrasmedbio.2005.10.009 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 261 Subjects: – SubjectFull: Imaging phantoms Type: general – SubjectFull: Tissues -- Models Type: general – SubjectFull: Body composition models Type: general – SubjectFull: Safflower oil Type: general – SubjectFull: Agar Type: general – SubjectFull: Gelatin Type: general Titles: – TitleFull: Stability of heterogeneous elastography phantoms made from oil dispersions in aqueous gels Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Madsen, Ernest L. – PersonEntity: Name: NameFull: Hobson, Maritza A. – PersonEntity: Name: NameFull: Shi, Hairong – PersonEntity: Name: NameFull: Varghese, Tomy – PersonEntity: Name: NameFull: Frank, Gary R. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 02 Text: Feb2006 Type: published Y: 2006 Identifiers: – Type: issn-print Value: 03015629 Numbering: – Type: volume Value: 32 – Type: issue Value: 2 Titles: – TitleFull: Ultrasound in Medicine & Biology Type: main |
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