US4825455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collimator for an X-ray mammography apparatus
Assignee: US Philips Corp
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Filing: 1985-10-04
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Granted: 1989-04-25
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Expires: 2005-10-04
Abstract
Abstract The invention relates to a collimator for an X-ray mammography. A cone which is connected to the radiation source defines a radiation field which corresponds to the format of the image pickup. This radiation field is further restricted by a pivotable diaphragm plate arranged in the cone. The radiation field can be adapted to the anatomy of the object to be imaged by pivoting the diaphragm plate.
Inventors
- 👤 Manfred Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:37
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/50; A61B6/502; A61B6/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
136 words
A device for generating collimated X-ray beams, said device comprising: an X-ray source for emitting an input X-ray beam; a cone arranged in the input X-ray beam to receive the entire input X-ray beam, said cone blocking a portion of the input X-ray beam such that a limited output X-ray beam emerges from the cone, said output X-ray beam being smaller than the input X-ray beam; a diaphragm arranged in the cone for blocking a portion of the input X-ray beam such that the output X-ray beam is divided into first and second separate portions, said diaphragm being pivotable about a pivot axis such that the first portion of the output X-ray beam does not change when the diaphragm is pivoted, and the second portion of the output X-ray beam changes when the diaphragm is pivoted.
Claim 2
Independent Claim
136 words
A device for generating collimated X-ray beams, said device comprising: an X-ray source for emitting an input X-ray beam; a cone arranged in the input X-ray beam to receive the entire input X-ray beam, said cone blocking a portion of the input X-ray beam such that a limited output X-ray beam emerges from the cone, said output X-ray beam being smaller than the input X-ray beam; a diaphragm arranged in the cone for blocking a portion of the input X-ray beam such that the output X-ray beam is divided into first and second separate portions, said diaphragm being pivotable about a pivot axis such that the first portion of the output X-ray beam does not change when the diaphragm is pivoted, and the second portion of the output X-ray beam changes when the diaphragm is pivoted.
Claim 3
Dependent Claim
20 words
A device as claimed in claim 1, characterized in that the pivot axis is at an edge of the diaphragm.
Claim 4
Dependent Claim
14 words
A device as claimed in claim 2, characterized in that the diaphragm is flat.
Claim 5
Dependent Claim
24 words
A device as claimed in claim 3, characterized in that the diaphragm has an L-shaped cross-section in a plane perpendicular to the pivot axis.
Claim 6
Dependent Claim
27 words
A device as claimed in claim 3, characterized in that the diaphragm has an edge opposite the pivot axis which edge is parallel to the pivot axis.
Claim 7
Dependent Claim
23 words
A device as claimed in claim 3, characterized in that the diaphragm has an edge opposite the pivot axis, which edge is concave.
Claim 8
Dependent Claim
25 words
A device as claimed in claim 1, characterized in that the pivot axis defines an edge of the first portion of the output X-ray beam.
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) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |