Multi-imaging modality tissue mimicking materials for imaging phantoms
First Claim
1. Multi-imaging modality tissue-mimicking material for phantoms for use with at least ultrasound and MRI comprising:
- an aqueous mixture of large organic water soluble molecules, a copper salt, a chelating agent for binding the copper ions in the salt, a gel-forming material, and beads intermixed therewith to provide a selected ultrasound attenuation coefficient, the beads treated to have a low effect on the MRI T1 and T2 properties of the tissue-mimicking material.
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Abstract
Tissue-mimicking material suitable for phantoms for use with at least ultrasound and MRI have sections of material in contact with each other which mimic ultrasound and magnetic resonance imaging properties of human tissues, and preferably also computed tomography properties, so that the phantom can be used for the testing of imaging by various types of medical imagers. A suitable tissue-mimicking material for use in phantoms of this type includes an aqueous mixture of large organic water soluble molecules, a copper salt, a chelating agent for binding the copper ions in the salt, and a gel-forming material. Small glass beads may be intermixed therewith to provide a selected ultrasound attenuation coefficient without substantially affecting the MRI properties of the material. Larger glass beads may be used in a section to control primarily the ultrasound backscatter coefficient without significant effect on the ultrasound attenuation coefficient. Tissue-mimicking material that simulates muscle may have smaller glass beads and a higher concentration of gel-forming material than an adjacent section. Such similar materials in contact with one another show relative stability over extended periods of time.
106 Citations
43 Claims
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1. Multi-imaging modality tissue-mimicking material for phantoms for use with at least ultrasound and MRI comprising:
an aqueous mixture of large organic water soluble molecules, a copper salt, a chelating agent for binding the copper ions in the salt, a gel-forming material, and beads intermixed therewith to provide a selected ultrasound attenuation coefficient, the beads treated to have a low effect on the MRI T1 and T2 properties of the tissue-mimicking material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Multi-imaging modality tissue-mimicking material for phantoms for use with at least ultrasound and MRI comprising:
an aqueous mixture of large organic water soluble molecules, CuCl2 salt, EDTA as a chelating agent for binding the copper ions in the salt, and a gel-forming material, and glass beads of two different diameters intermixed therewith to provide a selected ultrasound attenuation coefficient and backscatter coefficient, the glass beads selected to have a low effect on the MRI T1 and T2 properties of the tissue-mimicking material. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An imaging phantom for use with at least ultrasound and MRI comprising:
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(a) a phantom container;
(b) a tissue-mimicking material within the container, the tissue-mimicking material comprising at least two distinct sections in contact with each other, the two sections having first, small diameter glass beads intermixed therewith to provide a selected ultrasound attenuation coefficient therein, and wherein one of the sections includes second, larger diameter beads intermixed therewith to provide a selected backscatter coefficient therein. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An imaging phantom for use with at least ultrasound and MRI comprising:
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(a) a phantom container;
(b) a tissue-mimicking material within the container, the tissue-mimicking material comprising at least three distinct sections in contact with each other, the tissue-mimicking material in a first and second section in contact with each other including an aqueous mixture of large organic water soluble molecules, a copper salt, a chelating agent for bonding the copper ions in the salt, and a gel-forming material, the two sections having first, small diameter beads intermixed therewith to provide a selected ultrasound attenuation coefficient therein, and wherein one of the sections includes second, larger diameter beads intermixed therewith to provide a selected backscatter coefficient therein, the glass beads treated to have a low effect on the MRI T1 and T2 properties. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification