US5147372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biopsy arc means and the use of the same
Assignee: Individual
•
Filing: 1989-07-13
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Granted: 1992-09-15
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Expires: 2009-07-13
Abstract
Abstract The invention relates to a biopsy arc intended to be the support of examination needles in connection with computer tomography. The arc is removably secured to the patient's table and angularly adjustable to be adapted to the direction of the respective section image plane. The arc has a plurality of apertures directed towards the area enclosed by the arc for guiding the examination needles. The arc is made of a material which has an attenuation with respect to X-ray radiation which lies at or below the value exhibited by organic tissue, whereby the arc as well as organs can be brought to appear and stand out together on the section picture in order that a suitable aperture and direction of examination can be selected without risk of disturbing artefacts.
Inventors
- 👤 Bernt Nymark
- 👤 Gunnar Nasstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:29
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3403; A61B90/00; A61B90/10; A61B90/11; A61B10/00; A61B10/02; A61B10/0233; A61B2017/00831; A61B2017/00902; A61B90/39
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
154 words
A biopsy arc system for computed tomography comprising an arc which is adapted to be mounted archwise above a body that is to be examined, said arc being adjustably secured to a base member, the arc being provided with a plurality of apertures having axes which are directed towards the area within the arc, the arc being secured to the base member in such a way that it can be angularly adjusted in order to adapt a plane of the arc to an image section plane, the arc having a radiation attenuation coefficient which is essentially the same or smaller than a radiation attenuation coefficient exhibited by an organic tissue so that the arc will form a part of the associated image section plane whereby an axis of at least one of the apertures is identifiable in order that a suitable path may be selected for inserting an examination means through a selected aperture.
Claim 2
Dependent Claim
154 words
A biopsy arc system for computed tomography comprising an arc which is adapted to be mounted archwise above a body that is to be examined, said arc being adjustably secured to a base member, the arc being provided with a plurality of apertures having axes which are directed towards the area within the arc, the arc being secured to the base member in such a way that it can be angularly adjusted in order to adapt a plane of the arc to an image section plane, the arc having a radiation attenuation coefficient which is essentially the same or smaller than a radiation attenuation coefficient exhibited by an organic tissue so that the arc will form a part of the associated image section plane whereby an axis of at least one of the apertures is identifiable in order that a suitable path may be selected for inserting an examination means through a selected aperture.
Claim 3
Dependent Claim
44 words
A biopsy arc system according to claim 1, wherein the apertures have a diameter larger than that of said examination means and wherein said arc includes a sleeve which is located in one of said apertures in the arc for receiving said examination means.
Claim 4
Dependent Claim
76 words
A biopsy arc system according to claim 1, wherein one group of the apertures has axes which are radially directed towards a point within the area bounded by the arc and a second group of apertures has axes with a chordal orientation within the arc, the arc being removably secured to a base member so that said arc, when loosened, can be turned and re-secured for adjustment to a proper aperture for an examination being performed.
Claim 5
Dependent Claim
36 words
A biopsy arc system according to claim 1, wherein said arc comprises shanks on each end of the arc which are clamped to slides running along side rails mounted on either side of the base member.
Claim 6
Dependent Claim
38 words
A biopsy arc system according to claim 4, wherein a plate is pivotally mounted on said slide and wherein said arc includes means for clamping the respective shank of the arc between the plate and the respective slide.
Claim 7
Dependent Claim
31 words
A biopsy arc system according to claim 1 wherein the arc is made of a material which has an attenuation coefficient with respect to X-ray radiation of 200 H or less.
Claim 8
Dependent Claim
16 words
A biopsy arc system according to claim 6, wherein the arc is made of polyamide plastic.
Claim 9
Dependent Claim
31 words
A biopsy arc system according to claim 1, wherein the arc is made of a material which has an attenuation coefficient with respect to X-ray radiation of 80 H or less.
Claim 10
Dependent Claim
30 words
A biopsy arc according to claim 1, wherein the arc is made of a material which has an attenuation coefficient with respect to X-ray radiation of 70 H or less.
Claim 11
Dependent Claim
30 words
A biopsy arc according to claim 1, wherein the arc is made of a material which has an attenuation coefficient with respect to X-ray radiation of 125 H or less.
Claim 12
Dependent Claim
87 words
A frame for use in computed tomography, comprising: an arc comprising a material having a radiation attenuation coefficient which is less than a radiation attenuation coefficient of some organic tissue that is to be examined; a plurality of apertures arranged in the arc having axes directed towards an area under the arc; and means for angularly adjusting the arc so that at least some of said aperture axes coincide with a section plane of a tomographic image in order to form a part of said tomographic image.
Claim 13
Dependent Claim
87 words
A frame for use in computed tomography, comprising: an arc comprising a material having a radiation attenuation coefficient which is less than a radiation attenuation coefficient of some organic tissue that is to be examined; a plurality of apertures arranged in the arc having axes directed towards an area under the arc; and means for angularly adjusting the arc so that at least some of said aperture axes coincide with a section plane of a tomographic image in order to form a part of said tomographic image.
Claim 14
Dependent Claim
21 words
A frame according to claim 11, further comprising a sleeve arranged in one of said apertures for receiving a biopsy needle.
Claim 15
Dependent Claim
23 words
A frame according to claim 11 wherein the axes of some of said apertures are directed radially toward a center of said arc.
Claim 16
Dependent Claim
20 words
A frame according to claim 11 wherein the axes of some of said apertures are directed chordially on said arc.
Claim 17
Dependent Claim
37 words
A frame according to claim 11 wherein the axes of some of said apertures are directed radially toward a center of said arc and the axes of other of said apertures are directed chordially on said arc.
Claim 18
Dependent Claim
21 words
A frame according to claim 11 wherein said arc further comprises two shanks which are slideably connected to a base member.
Claim 19
Dependent Claim
23 words
A frame according to claim 11 wherein said attenuation coefficient with respect to X-ray radiation is less than or equal to 200 H.
Claim 20
Dependent Claim
23 words
A frame according to claim 11 wherein said attenuation coefficient with respect to X-ray radiation is less than or equal to 80 H.
Claim 21
Dependent Claim
14 words
A frame according to claim 11 wherein said arc material comprises any polyamide plastic.
Claim 22
Dependent Claim
23 words
A frame according to claim 11, wherein said attenuation coefficient with respect to X-ray radiation is less than or equal to 70 H.
Claim 23
Dependent Claim
115 words
A method of performing a biopsy, comprising the steps of: providing the biopsy arc of claim 1 making a tomographic image showing a plurality of radially directed apertures in a frame, said image also showing a reference point corresponding to an intersection of each of the axes of said apertures; selecting an appropriate aperture for guiding a biopsy needle by drawing a line from said reference point through a target point on said image to an appropriate one of said apertures; determining a depth of penetration for said biopsy needle according to a distance from said appropriate aperture to said target point; and penetrating said biopsy needle through said appropriate aperture to said target point.
Claim 24
Dependent Claim
92 words
A method of performing a biopsy, comprising the steps of: providing the frame for use in computed tomography of claim 10; making a tomographic image showing a plurality of apertures in a frame; selecting an appropriate aperture for guiding a biopsy needle by drawing a line along an axis of one of said apertures to a target point; determining a depth of penetration for said biopsy needle according to a distance from said appropriate aperture to said target point; and penetrating said biopsy needle through said appropriate aperture to said target point.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |