Slit-slat collimation
First Claim
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1. A slit-slat collimator, comprising:
- a collimator frame having a frusto-pyramidal housing disposed thereon, said frusto-pyramidal housing having a rectangular base, a rectangular top and open sides defined by a trapezoidal shape, wherein said housing provides lead shielding;
a plurality of axial septa;
a plurality of spacers;
a means for alignably stacking said axial septa and said spacers; and
an adjustable aperture plate mounted on said rectangular top comprising at least one adjustable aperture members.
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Abstract
This invention is directed to a collimator and collimation techniques. Specifically, the invention is directed to a collimator and method for collimation wherein the collimator combines the resolution and sensitivity properties of pinhole Single Photon Emission Computed Tomography (SPECT) imaging with the 2D complete-sampling properties of fan-beam collimators.
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Citations
60 Claims
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1. A slit-slat collimator, comprising:
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a collimator frame having a frusto-pyramidal housing disposed thereon, said frusto-pyramidal housing having a rectangular base, a rectangular top and open sides defined by a trapezoidal shape, wherein said housing provides lead shielding; a plurality of axial septa; a plurality of spacers; a means for alignably stacking said axial septa and said spacers; and an adjustable aperture plate mounted on said rectangular top comprising at least one adjustable aperture members. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A slit-slat collimator, comprising:
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a collimator frame having a frusto-pyramidal housing disposed thereon, said frusto-pyramidal housing having a rectangular base, a rectangular top and open sides defined by a trapezoidal shape, wherein said housing provides lead shielding; an aperture forming unit selected from the group consisting of a pair of symmetric aperture forming members, an axial septum or both; a means for alignably stacking said aperture forming unit; and an adjustable aperture plate mounted on said rectangular top comprising at least one aperture forming unit. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of collimating electromagnetic radiation, comprising the steps of:
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selecting a particular electromagnetic radiation for collimation, said radiation output from a specimen of interest; positioning a detector of said particular radiation in a location useful for gathering information about said specimen and associated with said particular radiation; using a slit-slat collimator, comprising;
a collimator frame having a frusto-pyramidal housing disposed thereon, said frusto-pyramidal housing having a rectangular base, a rectangular top and open sides defined by a trapezoidal shape, wherein said housing provides lead shielding;
a plurality of axial septa;
a plurality of spacers;
a means for alignably stacking said axial septa and said spacers; and
an adjustable aperture plate mounted on said rectangular top comprising at least one adjustable aperture members; andadjusting said aperture plate to adjust collimation aperture. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. An imaging system, comprising:
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an electromagnetic radiation point source; a detector panel having an array of detector elements disposed thereon; and a slit-slat collimator, comprising;
a collimator frame having a frusto-pyramidal housing disposed thereon, said frusto-pyramidal housing having a rectangular base, a rectangular top and open sides defined by a trapezoidal shape, wherein said housing provides lead shielding;
a plurality of axial septa;
a plurality of spacers;
a means for alignably stacking said axial septa and said spacers; and
an adjustable aperture plate mounted on said rectangular top comprising at least one adjustable aperture members. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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Specification