US4930143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for mammographic stereotactic punction of pathological lesions in the female breast
Assignee: Individual
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Filing: 1987-09-21
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Granted: 1990-05-29
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Expires: 2007-09-21
Abstract
Abstract Method and apparatus for stereotactic localization of cancer suspect lesions of the female breast in connection with X-ray mammography. The object is imaged in two directions, and the position of the lesions is calculated from the parallax displacement between the two images. The X-ray tube and the film are held stationary, and the parallax displacement is effected by moving the object laterally.
Inventors
- 👤 Bengt Lundgren
- 👤 Anders Wallner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:00
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/50; A61B6/502; A61B17/00; A61B17/34; A61B17/3403; A61B90/00; A61B90/10; A61B90/14; A61B90/17
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
155 words
A mammographic unit for use in stereographic localisation in a breast of a lesion suspected of being cancerous, said unit comprising: a stand; an x-ray tube mounted on the stand so as to emit an x-ray beam in a defined field; a holder means, laterally slidable with respect to said beam between a first imaging position within said field and a second imaging position within said field, for receiving a breast and for restraining the breast in a fixed shape, the fixed shape being maintained when the holder means is displaced between said first and second positions; and means for holding a film, located within the x-ray field and held stationary relative to the x-ray tube, in a position such that a first picture of said breast taken at the first imaging position and a second picture of the breast taken at the second imaging position will be located side by side on the film.
Claim 2
Dependent Claim
155 words
A mammographic unit for use in stereographic localisation in a breast of a lesion suspected of being cancerous, said unit comprising: a stand; an x-ray tube mounted on the stand so as to emit an x-ray beam in a defined field; a holder means, laterally slidable with respect to said beam between a first imaging position within said field and a second imaging position within said field, for receiving a breast and for restraining the breast in a fixed shape, the fixed shape being maintained when the holder means is displaced between said first and second positions; and means for holding a film, located within the x-ray field and held stationary relative to the x-ray tube, in a position such that a first picture of said breast taken at the first imaging position and a second picture of the breast taken at the second imaging position will be located side by side on the film.
Claim 3
Dependent Claim
60 words
A unit according to claim 1 further comprising an indicator means, mounted on the holder means, for providing x and y coordinates on the film so that the position of a lesion is defined with reference to said x and y coordinates, and a z-coordinate is calculable from displacement of the lesion between the two pictures imaged on said film.
Claim 4
Dependent Claim
31 words
A unit according to claim 2 which also comprises, mounted on the holder means, a punction cannula, and means for steering the punction cannula to the x-y-z coordinates in the breast.
Claim 5
Independent Claim
252 words
A method for stereographic localisation in a breast of a lesion suspected of being cancerous using a mammographic unit comprising an x-ray tube mounted on the stand so as to emit an x-ray beam in a defined field; a holder, laterally slidable, with respect to said beam, between a first imaging position within said field and a second imaging position within said field, for receiving a breast and restraining the breast in a fixed shape, and means for holding a film, located within the x-ray field and held stationary relative to the x-ray tube, in a position such that a first picture of said breast taken at the first imaging position and a second picture of the breast taken at the second imaging position will be located side by side on the film; said method comprising: placing a breast in the holder, and restraining the breast in a fixed shape; exposing the breast to x-rays while the holder is in said first imaging position so that a first picture is made on the film; sliding the holder to said second imaging position while restraining the breast in the fixed shape thereof; exposing the breast to x-rays while the holder is in its second imaging position so that a second picture is made on the film adjacent the first picture; using said first and second pictures to calculate the perceived parallactic displacement of a lesion imaged on the film; and using said displacement to determine the position of the lesion within the breast.
Claim 6
Independent Claim
252 words
A method for stereographic localisation in a breast of a lesion suspected of being cancerous using a mammographic unit comprising an x-ray tube mounted on the stand so as to emit an x-ray beam in a defined field; a holder, laterally slidable, with respect to said beam, between a first imaging position within said field and a second imaging position within said field, for receiving a breast and restraining the breast in a fixed shape, and means for holding a film, located within the x-ray field and held stationary relative to the x-ray tube, in a position such that a first picture of said breast taken at the first imaging position and a second picture of the breast taken at the second imaging position will be located side by side on the film; said method comprising: placing a breast in the holder, and restraining the breast in a fixed shape; exposing the breast to x-rays while the holder is in said first imaging position so that a first picture is made on the film; sliding the holder to said second imaging position while restraining the breast in the fixed shape thereof; exposing the breast to x-rays while the holder is in its second imaging position so that a second picture is made on the film adjacent the first picture; using said first and second pictures to calculate the perceived parallactic displacement of a lesion imaged on the film; and using said displacement to determine the position of the lesion within the breast.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |