APPARATUS & METHODS FOR COLLIMATION OF X-RAYS

• US 20150164443A1
• Filed: 01/27/2015
• Published: 06/18/2015
• Est. Priority Date: 11/25/2011
• Status: Active Grant

• Current Assignee: Aribex (Danaher Corporation)
• Original Assignee: Aribex (Danaher Corporation)
• Inventors: Laws, David J., Ellsworth, Devin
• Granted Patent: US 9,101,284 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 6/06 Diaphragms
• CPC Class Codes: A61B 6/08 Auxiliary means for directing the radiation beam to a particular spot, e.g. using light beams
• CPC Class Codes: A61B 6/4405 the apparatus being movable or portable, e.g. handheld or mounted on a trolley
• CPC Class Codes: A61B 6/588 Setting distance between source unit and detector unit
• CPC Class Codes: G21K 1/04 using variable diaphragms, shutters, choppers
• CPC Class Codes: G21K 1/046 varying the contour of the field, e.g. multileaf collimators

Abstract

Apparatus and methods for collimation of x-ray beams. According to various embodiments, an x-ray apparatus may comprise an x-ray source, 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. The x-ray apparatus may also be configured to be handheld.

Claims

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; and

an x-ray source arranged to direct x-rays through the x-ray collimation aperture, wherein the x-ray apparatus is further configured to be handheld.

2. The x-ray apparatus of claim 1, further comprising:

a second rotatable disk comprising a second plurality of angled slots; and

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 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.

3. The x-ray apparatus of claim 2, wherein the apparatus is configured such that the first rotatable disk can be rotated independently of the second rotatable disk.

4. The x-ray apparatus of claim 3, 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.

5. The x-ray apparatus of claim 1, 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.

6. The x-ray apparatus of claim 5, 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.

7. The x-ray apparatus of claim 5, 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.

8. The x-ray apparatus of claim 7, 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.

9. The x-ray apparatus of claim 1, 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.

10. The x-ray apparatus of claim 9, 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; and

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 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.

11. The x-ray apparatus of claim 10, 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.