Apparatus and methods for collimation of x-ray beams. According to various embodiments, an x-ray apparatus may comprise a first rotatable disk comprising a first plurality of angled slots and a first shutter comprising a first plurality of protruding members. At least one of the first plurality of p
Apparatus and methods for collimation of x-ray beams. According to various embodiments, an x-ray apparatus may comprise a first rotatable disk comprising a first plurality of angled slots and a first shutter comprising a first plurality of protruding members. At least one of the first plurality of protruding members may be positioned within a first angled slot of the first plurality of angled slots, and at least one of the first plurality of protruding members may be positioned within a second angled slot of the first plurality of angled slots. The first shutter may at least partially define an x-ray collimation aperture, and the apparatus may be configured such that rotation of the first rotatable disk results in movement of the first shutter to alter a size of the x-ray collimation aperture.
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1. An x-ray apparatus, comprising: a first rotatable disk comprising a first plurality of angled slots;a first shutter comprising a first plurality of protruding members, wherein at least one of the first plurality of protruding members is positioned within a first angled slot of the first plurality
1. An x-ray apparatus, comprising: a first rotatable disk comprising a first plurality of angled slots;a first shutter comprising a first plurality of protruding members, wherein at least one of the first plurality of protruding members is positioned within a first angled slot of the first plurality of angled slots, and wherein at least one of the first plurality of protruding members is positioned within a second angled slot of the first plurality of angled slots, wherein the first shutter at least partially defines an x-ray collimation aperture, and wherein the apparatus is configured such that rotation of the first rotatable disk results in movement of the first shutter to alter a size of the x-ray collimation aperture;a second rotatable disk comprising a second plurality of angled slots; anda second shutter comprising a second plurality of protruding members, wherein at least one of the second plurality of protruding members is positioned within a first angled slot of the second plurality of angled slots, and wherein at least one of the second plurality of protruding members is positioned within a second angled slot of the second plurality of angled slots, wherein the first shutter and the second shutter at least partially define the x-ray collimation aperture, and wherein the apparatus is configured such that rotation of the second rotatable disk results in movement of the second shutter to alter the size of the x-ray collimation aperture. 2. The x-ray apparatus of claim 1, wherein the apparatus is configured such that the first rotatable disk can be rotated independently of the second rotatable disk. 3. The x-ray apparatus of claim 2, wherein the apparatus is configured such that rotation of the first rotatable disk through a first angle results in movement of the first shutter of a first distance, wherein rotation of the second rotatable disk through the first angle results in movement of the second shutter of a second distance, and wherein the first distance differs from the second distance. 4. An x-ray apparatus, comprising: a first rotatable disk comprising a first plurality of angled slots; anda first shutter comprising a first plurality of protruding members, wherein at least one of the first plurality of protruding members is positioned within a first angled slot of the first plurality of angled slots, and wherein at least one of the first plurality of protruding members is positioned within a second angled slot of the first plurality of angled slots, wherein the first shutter at least partially defines an x-ray collimation aperture, and wherein the apparatus is configured such that rotation of the first rotatable disk results in movement of the first shutter to alter a size of the x-ray collimation aperture, wherein the first angled slot extends towards a center of the first rotatable disk at a first angle, wherein the second angled slot extends towards the center of the first rotatable disk at a second angle, and wherein the first angle is greater than the second angle. 5. The x-ray apparatus of claim 4, wherein the first angled slot has a first radius of curvature, wherein the second angled slot has a second radius of curvature, and wherein the first radius of curvature is greater than the second radius of curvature. 6. The x-ray apparatus of claim 4, further comprising: a second shutter comprising a second plurality of protruding members, wherein at least one of the second plurality of protruding members is positioned within a third angled slot of the first plurality of angled slots, and wherein at least one of the second plurality of protruding members is positioned within a fourth angled slot of the first plurality of angled slots. 7. The x-ray apparatus of claim 6, wherein the third angled slot extends towards the center of the first rotatable disk at a third angle, wherein the third angle is at least substantially identical to the first angle, wherein the fourth angled slot extends towards the center of the first rotatable disk at a fourth angle, and wherein the fourth angle is at least substantially identical to the second angle. 8. An x-ray apparatus, comprising: a first rotatable disk comprising a first plurality of angled slots; anda first shutter comprising a first plurality of protruding members, wherein at least one of the first plurality of protruding members is positioned within a first angled slot of the first plurality of angled slots, and wherein at least one of the first plurality of protruding members is positioned within a second angled slot of the first plurality of angled slots, wherein the first shutter at least partially defines an x-ray collimation aperture, wherein the apparatus is configured such that rotation of the first rotatable disk results in movement of the first shutter to alter a size of the x-ray collimation aperture, and wherein the first rotatable disk further comprises: a plurality of protrusions positioned along at least a portion of a perimeter of the first rotatable disk, wherein the protrusions protrude beyond the perimeter adjacent to the protrusions, and wherein the protrusions are configured to allow a user to rotate the first rotatable disk in order to alter a size of the x-ray collimation aperture. 9. The x-ray apparatus of claim 8, further comprising: a second rotatable disk comprising a second plurality of angled slots and a second plurality of protrusions positioned along at least a portion of a perimeter of the second rotatable disk, wherein the second plurality of protrusions protrude beyond the perimeter of the second rotatable disk adjacent to the protrusions, and wherein the second plurality of protrusions are configured to allow a user to rotate the second rotatable disk in order to alter a size of the x-ray collimation aperture; anda second shutter comprising a second plurality of protruding members, wherein at least one of the second plurality of protruding members is positioned within a first angled slot of the second plurality of angled slots, and wherein at least one of the second plurality of protruding members is positioned within a second angled slot of the second plurality of angled slots,wherein the first shutter and the second shutter at least partially define the x-ray collimation aperture, and wherein the apparatus is configured such that rotation of the second rotatable disk results in movement of the second shutter to alter the size of the x-ray collimation aperture. 10. The x-ray apparatus of claim 9, wherein the first plurality of protrusions have at least one of a different shape and a different size relative to the second plurality of protrusions. 11. An x-ray apparatus, comprising: an x-ray generator configured to generate x-ray electromagnetic radiation;a visible light generator configured to generate visible electromagnetic radiation, wherein the visible light generator is configured to deliver the visible electromagnetic radiation such that the visible electromagnetic radiation at least partially overlaps the x-ray electromagnetic radiation;a collimation aperture configured to deliver overlapping radiation comprising x-ray electromagnetic radiation from the x-ray generator and visible electromagnetic radiation from the visible light generator, wherein the collimation aperture is configured to deliver the visible electromagnetic radiation in a visible target shape and to deliver the x-ray electromagnetic radiation in an x-ray target shape, wherein the size of the visible target shape varies according to the size of the collimation aperture, and wherein size of the x-ray target shape also varies according to the size of the collimation aperture;a first rotatable disk; anda first shutter operably coupled with the first rotatable disk such that rotation of the first rotatable disk results in movement of the first shutter to alter the size of the collimation aperture. 12. The x-ray apparatus of claim 11, wherein the visible light generator comprises a light-emitting diode. 13. The x-ray apparatus of claim 11, further comprising a mirror, wherein the mirror is positioned and configured to reflect light from the visible light generator through the collimation aperture, wherein the mirror is transparent to x-ray electromagnetic radiation, and wherein the mirror is positioned in between the x-ray generator and the collimation aperture and configured such that x-ray electromagnetic radiation from the x-ray generator passes through the mirror before being delivered through the collimation aperture. 14. The x-ray apparatus of claim 13, wherein the mirror comprises a silver coating. 15. The x-ray apparatus of claim 14, wherein the silver coating comprises a silver oxide coating. 16. The x-ray apparatus of claim 13, wherein the x-ray generator is positioned away from a center of the mirror by a first distance, wherein the visible light generator is positioned away from the center of the mirror by a second distance, and wherein the first distance is at least substantially identical to the second distance. 17. The x-ray apparatus of claim 13, wherein the first rotatable disk comprises a first plurality of angled slots, wherein the first shutter comprises a first plurality of protruding members, wherein at least one of the first plurality of protruding members is positioned within a first angled slot of the first plurality of angled slots, and wherein at least one of the first plurality of protruding members is positioned within a second angled slot of the first plurality of angled slots. 18. The x-ray apparatus of claim 17, further comprising: a second rotatable disk comprising a second plurality of angled slots; anda second shutter comprising a second plurality of protruding members, wherein at least one of the second plurality of protruding members is positioned within a first angled slot of the second plurality of angled slots, wherein at least one of the second plurality of protruding members is positioned within a second angled slot of the second plurality of angled slots, and wherein the second shutter is operably coupled with the second rotatable disk such that rotation of the second rotatable disk results in movement of the second shutter to alter the size of the collimation aperture. 19. An x-ray apparatus, comprising: an x-ray generator configured to generate x-ray electromagnetic radiation;a visible light generator configured to generate visible electromagnetic radiation, wherein the visible light generator is configured to deliver the visible electromagnetic radiation such that the visible electromagnetic radiation at least partially overlaps the x-ray electromagnetic radiation;a first rotatable disk comprising a first plurality of angled slots;a first shutter comprising a first plurality of protruding members, wherein at least one of the first plurality of protruding members is positioned within a first angled slot of the first plurality of angled slots, and wherein at least one of the first plurality of protruding members is positioned within a second angled slot of the first plurality of angled slots;a second rotatable disk comprising a second plurality of angled slots; anda second shutter comprising a second plurality of protruding members, wherein at least one of the second plurality of protruding members is positioned within a first angled slot of the second plurality of angled slots, and wherein at least one of the second plurality of protruding members is positioned within a second angled slot of the second plurality of angled slots,wherein the first shutter and second shutters at least partially define a collimation aperture, wherein the apparatus is configured such that rotation of the first rotatable disk results in movement of the first shutter to alter a size of the collimation aperture, wherein the apparatus is configured such that rotation of the second rotatable disk results in movement of the second shutter to alter a size of the collimation aperture,wherein the apparatus is configured to deliver overlapping radiation comprising x-ray electromagnetic radiation from the x-ray generator and visible electromagnetic radiation from the visible light generator, wherein the collimation aperture is configured to deliver the visible electromagnetic radiation in a visible target shape and to deliver the x-ray electromagnetic radiation in an x-ray target shape, wherein the size of the visible target shape varies according to the size of the collimation aperture, and wherein size of the x-ray target shape also varies according to the size of the collimation aperture.
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Barry Donald ; Cabral Richard E. ; Ramsdell Tracy L., X-ray bone densitometry apparatus with variable attenuation, modulation and collimation of penetrating radiation beam.
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