US5149965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision radiography scaling device
Assignee: Temple University
•
Filing: 1990-04-23
•
Granted: 1992-09-22
•
Expires: 2010-04-23
Abstract
Abstract At least one radiopaque sphere of known dimensions with means for positioning same in a radiographic image field and a method for scaling radiographic images including straight AP and lateral views using such a radiopaque sphere.
Inventors
- 👤 Lloyd A. Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:42
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/58; A61B6/582; A61B6/583; G; G01; G01N; G01N23/00; G01N23/02; G01N23/04; A61B6/50; A61B6/508
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
96 words
A method for scaling a radiograph of a target structure within a three dimensional radiographic image field of a radiographic camera comprising placing at least one radiopaque sphere of known dimensions in said three dimensional radiographic image field at a location previously occupied by said target structure when said target structure radiograph was taken and then making a radiograph of said spherical object with said camera, thereafter calculating a first dimension to be determined in said target structure radiograph by comparing said first dimension to the known dimension of said spherical object in the radiograph thereof.
Claim 2
Independent Claim
96 words
A method for scaling a radiograph of a target structure within a three dimensional radiographic image field of a radiographic camera comprising placing at least one radiopaque sphere of known dimensions in said three dimensional radiographic image field at a location previously occupied by said target structure when said target structure radiograph was taken and then making a radiograph of said spherical object with said camera, thereafter calculating a first dimension to be determined in said target structure radiograph by comparing said first dimension to the known dimension of said spherical object in the radiograph thereof.
Claim 3
Dependent Claim
24 words
The method of claim 1, wherein said at least one sphere is encased in a material of different radiopacity as compared to the sphere.
Claim 4
Dependent Claim
24 words
The method of claim 1, wherein a plurality of radiopaque spheres, with unique identifying characteristics, are placed at spaced locations in the image field.
Claim 5
Dependent Claim
16 words
The method of claim 3, wherein said unique identifying characteristics of said spheres are differing diameters.
Claim 6
Dependent Claim
32 words
The method of claim 4, further including placing at least one sphere in the center of said image field and placing at least one sphere on the periphery of said image field.
Claim 7
Dependent Claim
24 words
The method of claim 5, wherein said at least one sphere is encased in a material of different radiopacity as compared to the sphere.
Claim 8
Dependent Claim
35 words
The method of claim 4, further including placing at least one sphere in the center of said image field and placing two or more spheres at spaced locations on intermediate points of said image field.
Claim 9
Dependent Claim
24 words
The method of claim 7, wherein said at least one sphere is encased in a material of different radiopacity as compared to the sphere.
Claim 10
Dependent Claim
19 words
The method of claim 1 wherein said sphere is placed by manipulation of a member associated with a table.
Claim 11
Independent Claim
119 words
A method of scaling radiographs of a target structure in a common three dimensional image field of at least two radiographic devices each having fixed locations and angular orientations, comprising placing a spherical radiopaque object of known spherical dimension in said image field in the same location occupied by said target structure when said target structure radiographs were taken and then making radiographs of said spherical object with said devices, thereafter calculating a first dimension to be determined in one of said target structure radiographs by comparing said first dimension to the known dimension of said spherical object in the radiograph thereof made by the same device which produced the radiograph in which said dimension is to be determined.
Claim 12
Independent Claim
119 words
A method of scaling radiographs of a target structure in a common three dimensional image field of at least two radiographic devices each having fixed locations and angular orientations, comprising placing a spherical radiopaque object of known spherical dimension in said image field in the same location occupied by said target structure when said target structure radiographs were taken and then making radiographs of said spherical object with said devices, thereafter calculating a first dimension to be determined in one of said target structure radiographs by comparing said first dimension to the known dimension of said spherical object in the radiograph thereof made by the same device which produced the radiograph in which said dimension is to be determined.
References Cited (Backward Citations)
US1396920A
Cited
US2650308A
Cited
US3217705A
Cited
US3706883A
Cited
US3687142A
Cited
US3770956A
Cited
US3807390A
Cited
US3836776A
Cited
US3887804A
Cited
US4005527A
Cited
US4181859A
Cited
US4286168A
Cited
US4279252A
Cited
US4442534A
Cited
US4459990A
Cited
US4692936A
Cited
US4671291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-09-22 | 1996-03-23 | 1996-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-22 | 2000-03-23 | 2000-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-22 | 2004-03-23 | 2004-09-22 | $7700.00 | Window Closed / Lapsed |