X-ray anti scatter grid

Patent metadata

Field	Value
Publication number	US-12089975-B2
Application number	US-202017760923-A
Country	US
Kind code	B2
Filing date	Sep 10, 2020
Priority date	Sep 18, 2019
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

The present invention relates to an X-ray anti-scatter grid ( 10 ). The anti-scatter grid comprises a plurality of primary septa walls ( 20 ), and a plurality of secondary septa walls ( 30 ). The plurality of primary septa walls comprise an X-ray absorbing material. The plurality of primary septa walls are substantially parallel to one another. The plurality of secondary septa walls are located between adjacent pairs of walls of the plurality of primary septa walls such that each secondary septa wall is located between an adjacent pair of walls of the plurality of primary septa walls. Each secondary septa wall of the plurality of secondary septa walls is formed from a plurality of columnar structures ( 40 ) extending between the plurality of primary septa walls. The plurality of columnar structures comprise an X-ray absorbing material.

First claim

The invention claimed is:

1. An X-ray anti-scatter grid, comprising:
a plurality of primary septa walls; and
a plurality of secondary septa walls;
wherein the plurality of primary septa walls comprise an X-ray absorbing material;
wherein the plurality of primary septa walls are substantially parallel to one another;
wherein the plurality of secondary septa walls are located between adjacent pairs of walls of the plurality of primary septa walls such that each secondary septa wall is located between an adjacent pair of walls of the plurality of primary septa walls,
wherein each secondary septa wall of the plurality of secondary septa walls is formed from a plurality of columnar structures extending between the plurality of primary septa walls, wherein the plurality of columnar structures comprise an X-ray absorbing material, and
wherein the plurality of secondary septa walls are arranged within a plurality of sheets, wherein a sheet of the plurality of sheets is located between each adjacent pair of walls of the plurality of primary septa walls.

2. The anti-scatter grid according to claim 1 , wherein the plurality of columnar structures extend in a direction substantially perpendicular to the plurality of primary septa walls.

3. The anti-scatter grid according to claim 1 , wherein the plurality of sheets are one of paper, carbon, polymer, insulator material, composite material, reinforced material, low-weight material, aluminum, or other low-weight metal.

4. The anti-scatter grid according to claim 1 , wherein the plurality of secondary septa walls are formed from a plurality of lines of the plurality of columnar structures.

5. The anti-scatter grid according to claim 1 , wherein the plurality of columnar structures are located in holes in the plurality of sheets.

6. The anti-scatter grid according to claim 1 , wherein two or more of the secondary septa walls in each sheet of the plurality of sheets are angled one to the other.

7. The anti-scatter grid according to claim 6 , wherein the two or more of the secondary septa walls in each sheet of the plurality of sheets are angled towards a common point or line in space.

8. A method of manufacturing an X-ray anti-scatter grid, comprising:
providing a plurality of primary septa walls and a plurality of secondary septa walls, wherein the plurality of primary septa walls comprise an X-ray absorbing material;
arranging the plurality of primary septa walls substantially parallel to one another;
forming the plurality of secondary septa walls within a plurality of sheets;
locating a sheet of the plurality of sheets between each adjacent pair of walls of the plurality of primary septa walls;
forming each secondary septa wall of the plurality of secondary septa walls from a plurality of columnar structures extending between the plurality of primary septa walls; and
locating the plurality of secondary septa walls between adjacent pairs of walls of the plurality of primary septa walls such that each secondary septa wall is located between an adjacent pair of walls of the plurality of primary septa walls, wherein the plurality of columnar structures comprise an X-ray absorbing material.

9. The method according to claim 8 , further comprising forming the plurality of columnar structures in holes in the plurality of sheets.

10. The method according to claim 9 , further comprising forming the plurality of columnar structures by printing into the plurality of holes.

11. The method according to claim 9 , further comprising machining back at least one surface of each sheet of the plurality of sheets.

Assignees

• Koninklijke Philips Nv

Inventors

• Jacobs Johannes Wilhelmus Maria

Classifications

• G21K1/025 Primary

  using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation · CPC title

• A61B6/4291 Primary

  the detector being combined with a grid or grating · CPC title