Universal, modular temperature controlled MRI phantom for calibrated anisotropic and isotropic imaging including hollow fluid filled tubular textiles for calibrated anisotropic imaging
First Claim
1. An MRI phantom [10] for calibrated anisotropic imaging comprising hollow tubular textile fibers [12], wherein the improvement comprises that each hollow tubular fiber [12] has an outer diameter of less than 50 microns and an inner diameter of less than 20 microns, and wherein at least half of the hollow tubular fibers [12] are filled with a fluid [14], wherein the phantom [10] is configured to be worn by a patient in the MRI and wherein the phantom includes a plurality of alignment targets visible to the MRI.
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Abstract
A universal, modular, temperature controlled MRI phantom for calibration and validation for anisotropic and isotropic imaging comprises an outer insulating shell configured to be received within an MRI chamber; an inner shell received within the outer insulating shell; a fluid conduits adjacent the inner shell for receiving temperature controlling fluid or gas cycling there-through; and a series of stacked layers of frames containing test points for the MRI phantom, each layer including at least one fiducial and including at least some anisotropic imaging test points in at least one frame and at least one isotropic imaging test point in at least one frame. The anisotropic imaging comprises hollow tubular textile fibers, wherein each hollow tubular fiber has an outer diameter of less than 50 microns and an inner diameter of less than 20 microns, wherein at least some hollow tubular fibers are filled with a fluid.
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Citations
21 Claims
- 1. An MRI phantom [10] for calibrated anisotropic imaging comprising hollow tubular textile fibers [12], wherein the improvement comprises that each hollow tubular fiber [12] has an outer diameter of less than 50 microns and an inner diameter of less than 20 microns, and wherein at least half of the hollow tubular fibers [12] are filled with a fluid [14], wherein the phantom [10] is configured to be worn by a patient in the MRI and wherein the phantom includes a plurality of alignment targets visible to the MRI.
- 5. An MRI phantom [10] for calibrated anisotropic imaging comprising hollow tubular textile fibers [12], wherein the improvement comprises that each hollow tubular fiber [12] has an outer diameter of less than 50 microns and an inner diameter of less than 20 microns, and wherein at least half of the hollow tubular fibers [12] are filled with a fluid [14], wherein at least some of the hollow tubular fluid filled textile fibers [12] are formed in fasciculi [16], wherein at least some fasciculi [16] are combined into tracks [18] that are supported in fixed frames [20] within the phantom [10], and wherein at least one fixed frame [20] is formed as a fiber density frame which includes fiber [12] density variations across the fixed frame [20], whereby the fibers [12]/unit area in the fixed frame [20] are provided at distinct known varied amounts at least three distinct test points across the fixed frame [20].
- 9. An MRI phantom [10] for calibrated anisotropic imaging comprising hollow tubular textile fibers [12], wherein the improvement comprises that each hollow tubular fiber [12] has an outer diameter of less than 50 microns and an inner diameter of less than 20 microns, and wherein at least half of the hollow tubular fibers [12] are filled with a fluid [14], wherein at least some of the hollow tubular fluid filled textile fibers [12] are formed in fasciculi [16], wherein at least some fasciculi [16] are combined into tracks [18] that are supported in fixed frames [20] within the phantom [10], and wherein at least one fixed frame [20] is formed as a fiber crossing frame which includes at least three distinct angle fiber [12] crossings across the fiber crossing frame [20].
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11. An MRI phantom [10] for calibrated anisotropic imaging comprising hollow tubular textile fibers [12], wherein the improvement comprises that each hollow tubular fiber [12] has an outer diameter of less than 50 microns and an inner diameter of less than 20 microns, and wherein at least half of the hollow tubular fibers [12] are filled with a fluid [14], wherein at least some of the hollow tubular fluid filled textile fibers [12] are formed in fasciculi [16], wherein at least some fasciculi [16] are combined into tracks [18] that are supported in fixed frames [20] within the phantom [10], and wherein at least one fixed frame [20] is formed as a physiologic simulation frame [20] and includes a shell simulating a human cranium, simulated eyes [32] and tracks [18] simulating known physiologic optical neural tracts from the simulated eyes [32], and wherein the tracks [18] simulating known physiologic optical neural tracts from the simulated eyes [32] includes at least one segment that spreads individual fasciculi [16].
- 12. An MRI phantom [10] for calibrated anisotropic imaging comprising hollow tubular textile fibers [12], wherein the improvement comprises that each hollow tubular fiber [12] has an outer diameter of less than 50 microns and an inner diameter of less than 20 microns, and wherein at least half of the hollow tubular fibers [12] are filled with a fluid [14], wherein at least some of the hollow tubular fluid filled textile fibers [12] are formed in fasciculi [16], wherein at least some fasciculi [16] are combined into tracks [18] that are supported in fixed frames [20] within the phantom [10], and wherein at least one fixed frame [20] is formed as a routing frame [20] which includes a plurality of distinct track starting locations at one end thereof and a plurality of aligned track ending locations at an opposed end thereof and tracks [18] extending from the starting locations to the ending locations, wherein substantially all of the tracks [18] end in an ending location that is not aligned with the respective track'"'"'s starting location.
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16. A universal, modular, temperature controlled MRI phantom for calibration and validation for anisotropic and isotropic imaging comprising:
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An outer insulating shell configured to be received within an MRI chamber; An inner shell received within the outer insulating shell; Fluid conduits adjacent the inner shell for receiving temperature controlling fluid or gas cycling there-through; and A series of stacked layers of frames containing test points for the MRI phantom, wherein each layer includes at least one fiducial, and further including at least some anisotropic imaging test points in at least one frame and at least one isotropic imaging test point in at least one frame; and a simulated fat layer surrounding the inner shell, wherein the simulated fat layer is formed of an oil, and wherein the outer insulating shell includes a foam structure sized to fit a particular MRI system. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification