Patent US5623528A successfully refreshed from Google Patents.
US5623528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for generating 3-dimensional images
Assignee: Fujitsu Ltd
•
Filing: 1994-03-09
•
Granted: 1997-04-22
•
Expires: 2014-03-09
Abstract
Abstract An object of the present invention is to provide a novel method for generating 3-dimensional radiation images and, more particularly, a method for generating 3-dimensional radiation images capable of aligning completely registered 3-dimensional positions thereof. At least one 2-dimensional radiation image of a subject carried by a radiant ray which has passed through a subject is obtained by irradiating a radiant ray from a plurality of positions, which differ from one another, toward said subject, 2-dimensional pixel data which denotes pixel values at respective points on said 2-dimensional radiation image is obtained by repeatedly scanning an image in a main scanning direction which intersects a sub-scanning direction while sequentially moving in said specified sub-scanning direction on this 2-dimensional radiation image, and 3-dimensional pixel data which denotes the pixel values corresponding to 3-dimensional points inside said subject are obtained based on the 2-dimensional pixel data.
Inventors
- 👤 Shiro Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:40
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/42; A61B6/4208; A61B6/4216; G; G01; G01N; G01N23/00; G01N23/02; G01N23/04; G01N23/044; A61B6/58; A61B6/582; A61B6/583
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
156 words
A method for generating 3-dimensional radiation images comprising a step for obtaining at least one 2-dimensional radiation image of a subject carried by a radiant ray which has passed through a subject is obtained by irradiating a radiant ray from a plurality of positions, which differ from one another, toward said subject; a step for obtaining 2-dimensional pixel data which denotes pixel values at respective points on said 2-dimensional radiation image by repeatedly scanning an image in a main scanning direction which intersects a sub-scanning direction while sequentially moving in said specified sub-scanning direction on this 2-dimensional radiation image; and a step for obtaining 3-dimensional pixel data which denotes the pixel values corresponding to 3-dimensional points inside said subject based on the 2-dimensional pixel data, wherein said 2-dimensional radiation image is one 2-dimensional radiation image obtained by simultaneously irradiating a radiant ray toward said subject from a plurality of irradiating positions which differ from one another.
Claim 2
Independent Claim
156 words
A method for generating 3-dimensional radiation images comprising a step for obtaining at least one 2-dimensional radiation image of a subject carried by a radiant ray which has passed through a subject is obtained by irradiating a radiant ray from a plurality of positions, which differ from one another, toward said subject; a step for obtaining 2-dimensional pixel data which denotes pixel values at respective points on said 2-dimensional radiation image by repeatedly scanning an image in a main scanning direction which intersects a sub-scanning direction while sequentially moving in said specified sub-scanning direction on this 2-dimensional radiation image; and a step for obtaining 3-dimensional pixel data which denotes the pixel values corresponding to 3-dimensional points inside said subject based on the 2-dimensional pixel data, wherein said 2-dimensional radiation image is one 2-dimensional radiation image obtained by simultaneously irradiating a radiant ray toward said subject from a plurality of irradiating positions which differ from one another.
Claim 3
Dependent Claim
41 words
A method for generating 3-dimensional radiation images in accordance with claim 1, wherein the radiant ray is irradiated to said subject whose parts other than a part from which said 3-dimensional image data is desired are covered with a radiation shield.
Claim 4
Dependent Claim
54 words
A method for generating 3-dimensional radiation images in accordance with claim 1, wherein said plurality of irradiating positions are set so that a straight line which connect through said plurality of irradiating positions extends in a direction corresponding to one of said main scanning direction and said subnscanning direction on said 2-dimensional radiation image.
Claim 5
Dependent Claim
71 words
A method for generating 3-dimensional radiation images in accordance with claim 1, wherein the radiant ray is irradiated onto said subject to which markers are attached to recognize a plurality of images of said markers which are obtained on said 2-dimensional radiation image, and an angle formed by a straight line, which connects through said plurality of images, and one of said main scanning direction and said sub-scanning direction is obtained.
Claim 6
Dependent Claim
94 words
A method for generating 3-dimensional radiation images in accordance with claim 1, wherein a maximum distance Δmax between a plurality of points formed on said 2-dimensional radiation image by a radiant ray which has been irradiated from a plurality of irradiating positions and has passed through one point inside said subject, respective pluralities of points corresponding to each point inside said subject on said 2-dimensional radiation image are evaluated within said maximum distance Δmax, and said 3-dimensional pixel data is obtained based on respective 2-dimensional pixel data obtained from said respective pluralities of points.
Claim 7
Dependent Claim
62 words
A method for generating 3-dimensional radiation images in accordance with claim 5, wherein the radiant ray is irradiated to said subject to which markers are attached at a radiation irradiation side thereof, a plurality of images of said markers obtained on said 2-dimensional radiation image are recognized, and said maximum distance Δmax is set according to distances among said plurality of images.
Claim 8
Dependent Claim
74 words
A method for generating 3-dimensional radiation images in accordance with claim 5, a plurality of points having the same pixel value which exist within said maximum distance Δmax with a specified permissible difference are regarded as a plurality of candidate points corresponding to the specified points in said subject, and said plurality of points corresponding to said specified points are found by recognizing a continuity of these candidate points on said 2-dimensional radiation image.
Claim 9
Dependent Claim
67 words
A method for generating 3-dimensional radiation images in accordance with claim 7, a representative pixel value of a plurality of pixels which exist within specified regions around respective pixels on said 2-dimensional radiation image is regarded as a base pixel value for said respective pixels and said continuity is recognized based on a differential component between the pixel values of respective pixels and said base pixel value.
Claim 10
Dependent Claim
45 words
A method for generating 3-dimensional radiation images in accordance with claim 5, a smoothing processing is given to said 2-dimensional radiation image based on said 2-dimensional pixel data for obtaining pluralities of points corresponding to respective points in said subject on said 2-dimensional radiation image.
Claim 11
Dependent Claim
25 words
A method for generating 3-dimensional radiation images in accordance with claim 9, wherein said smoothing processing differs with each region on said 2-dimensional radiation image.
Claim 12
Dependent Claim
30 words
A method for generating 3-dimensional radiation images in accordance with claim 1, wherein a desired tomographic image of said subject is generated according to said 3-dimensional image data and displayed.
Claim 13
Dependent Claim
33 words
A method for generating 3-dimensional radiation images in accordance with claim 1, wherein an image of said subject projected in a desired direction is generated according to said 3-dimensional pixel data and displayed.
Claim 14
Dependent Claim
49 words
A method for generating 3-dimensional radiation images in accordance with claim 1, wherein, in a case that said subject is an alive subject whose bone is partly cut away, an image of said subject projected in a desired direction is generated according to said 3-dimensional pixel data and displayed.
Claim 15
Dependent Claim
42 words
A method for generating 3-dimensional radiation images in accordance with claim 1, wherein, in a case that said subject is an alive subject, a pixel value of a bone of said subject is obtained according to said 3-dimensional pixel data and displayed.
Claim 16
Dependent Claim
40 words
A method for generating 3-dimensional radiation images in accordance with claim 1, wherein a plurality of 2-dimensional images which are projected in directions differing from one another as much as an angle corresponding to a parallax are generated and displayed.
Claim 17
Dependent Claim
36 words
A method for generating 3-dimensional radiation images in accordance with claim 1, wherein one of a silver halide film and an accelerated phosphorescence fluorescent is used as a radiation sensor for obtaining said 2-dimensional radiation image.
Claim 18
Independent Claim
156 words
A method for generating 3-dimensional radiation images comprising a step for obtaining at least one 2-dimensional radiation image of a subject carried by a radiant ray which has passed through a subject is obtained by irradiating a radiant ray from a plurality of positions, which differ from one another, toward said subject; a step for obtaining 2-dimensional pixel data which denotes pixel values at respective points on said 2-dimensional radiation image by repeatedly scanning an image in a main scanning direction which intersects a sub-scanning direction while sequentially moving in said specified sub-scanning direction on this 2-dimensional radiation image; and a step for obtaining 3-dimensional pixel data which denotes the pixel values corresponding to 3-dimensional points inside said subject based on the 2-dimensional pixel data, wherein said 2-dimensional radiation image is one 2-dimensional radiation image obtained by sequentially irradiating a radiant ray toward said subject from a plurality of irradiating positions which differ from one another.
Claim 19
Independent Claim
156 words
A method for generating 3-dimensional radiation images comprising a step for obtaining at least one 2-dimensional radiation image of a subject carried by a radiant ray which has passed through a subject is obtained by irradiating a radiant ray from a plurality of positions, which differ from one another, toward said subject; a step for obtaining 2-dimensional pixel data which denotes pixel values at respective points on said 2-dimensional radiation image by repeatedly scanning an image in a main scanning direction which intersects a sub-scanning direction while sequentially moving in said specified sub-scanning direction on this 2-dimensional radiation image; and a step for obtaining 3-dimensional pixel data which denotes the pixel values corresponding to 3-dimensional points inside said subject based on the 2-dimensional pixel data, wherein said 2-dimensional radiation image is one 2-dimensional radiation image obtained by sequentially irradiating a radiant ray toward said subject from a plurality of irradiating positions which differ from one another.
Claim 20
Dependent Claim
41 words
A method for generating 3-dimensional radiation images in accordance with claim 17, wherein the radiant ray is irradiated to said subject whose parts other than a part from which said 3-dimensional image data is desired are covered with a radiation shield.
Claim 21
Dependent Claim
54 words
A method for generating 3-dimensional radiation images in accordance with claim 17, wherein said plurality of irradiating positions are set so that a straight line which connect through said plurality of irradiating positions extends in a direction corresponding to one of said main scanning direction and said sub-scanning direction on said 2-dimensional radiation image.
Claim 22
Dependent Claim
71 words
A method for generating 3-dimensional radiation images in accordance with claim 17, wherein the radiant ray is irradiated onto said subject to which markers are attached to recognize a plurality of images of said markers which are obtained on said 2-dimensional radiation image, and an angle formed by a straight line, which connects through said plurality of images, and one of said main scanning direction and said sub-scanning direction is obtained.
Claim 23
Dependent Claim
95 words
A method for generating 3-dimensional radiation images in accordance with claim 17, wherein a maximum distance Δ max between a plurality of points formed on said 2-dimensional radiation image by a radiant ray which has been irradiated from a plurality of irradiating positions and has passed through one point inside said subject, respective pluralities of points corresponding to each point inside said subject on said 2-dimensional radiation image are evaluated within said maximum distance Δmax, and said 3-dimensional pixel data is obtained based on respective 2-dimensional pixel data obtained from said respective pluralities of points.
Claim 24
Dependent Claim
62 words
A method for generating 3-dimensional radiation images in accordance with claim 21, wherein the radiant ray is irradiated to said subject to which markers are attached at a radiation irradiation side thereof, a plurality of images of said markers obtained on said 2-dimensional radiation image are recognized, and said maximum distance Δmax is set according to distances among said plurality of images.
Claim 25
Dependent Claim
75 words
A method for generating 3-dimensional radiation images in accordance with claim 21, a plurality of points having the same pixel value which exist within said maximum distance Δ max with a specified permissible difference are regarded as a plurality of candidate points corresponding to the specified points in said subject, and said plurality of points corresponding to said specified points are found by recognizing a continuity of these candidate points on said 2-dimensional radiation image.
Claim 26
Dependent Claim
67 words
A method for generating 3-dimensional radiation images in accordance with claim 23, a representative pixel value of a plurality of pixels which exist within specified regions around respective pixels on said 2-dimensional radiation image is regarded as a base pixel value for said respective pixels and said continuity is recognized based on a differential component between the pixel values of respective pixels and said base pixel value.
Claim 27
Dependent Claim
45 words
A method for generating 3-dimensional radiation images in accordance with claim 21, a smoothing processing is given to said 2-dimensional radiation image based on said 2-dimensional pixel data for obtaining pluralities of points corresponding to respective points in said subject on said 2-dimensional radiation image.
Claim 28
Dependent Claim
25 words
A method for generating 3-dimensional radiation images in accordance with claim 25, wherein said smoothing processing differs with each region on said 2-dimensional radiation image.
Claim 29
Dependent Claim
30 words
A method for generating 3-dimensional radiation images in accordance with claim 17, wherein a desired tomographic image of said subject is generated according to said 3-dimensional image data and displayed.
Claim 30
Dependent Claim
33 words
A method for generating 3-dimensional radiation images in accordance with claim 17, wherein an image of said subject projected in a desired direction is generated according to said 3-dimensional pixel data and displayed.
Claim 31
Dependent Claim
49 words
A method for generating 3-dimensional radiation images in accordance with claim 17, wherein, in a case that said subject is an alive subject whose bone is partly cut away, an image of said subject projected in a desired direction is generated according to said 3-dimensional pixel data and displayed.
Claim 32
Dependent Claim
42 words
A method for generating 3-dimensional radiation images in accordance with claim 17, wherein, in a case that said subject is an alive subject, a pixel value of a bone of said subject is obtained according to said 3-dimensional pixel data and displayed.
Claim 33
Dependent Claim
40 words
A method for generating 3-dimensional radiation images in accordance with claim 17, wherein a plurality of 2-dimensional images which are projected in directions differing from one another as much as an angle corresponding to a parallax are generated and displayed.
Claim 34
Dependent Claim
37 words
(NEW) A method for generating 3-dimensional radiation images in accordance with claim 17, wherein one of a silver halide film and an accelerated phosphorescence fluorescent is used as a radiation sensor for obtaining said 2-dimensional radiation image.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-04-21 | 2000-10-21 | 2001-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-04-21 | 2004-10-21 | 2005-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-04-21 | 2008-10-21 | 2009-04-22 | $7700.00 | Window Closed / Lapsed |