US4513204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Housing for a radioactive source
Assignee: Siemens Gammasonics Inc
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Filing: 1982-08-27
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Granted: 1985-04-23
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Expires: 2002-08-27
Abstract
Abstract The radioactive structure comprises a radioactive source surrounded by a housing. The housing contains a first and second shielding body and a connecting device. The first shielding body has a protrusion which contains a first recess for receiving the radioactive source. The second shielding body has a second recess in one face end which accommodates the protrusion and a conical aperture communicating with the second recess in another face end. The connecting device connects the first shielding body to the second shielding body. When the radioactive source is inserted into the first recess and when the protrusion is located in the second recess, the radioactive source emits radiation primarily through the conical aperture into the environment. The source preferably contains americium which emits gamma radiation. The structure may be used as a motion correction sensor or as a marker in nuclear diagnostic imaging.
Inventors
- 👤 James R. Domnanovich
- 👤 William D. Erwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:08
CPC Classifications
G; G21; G21F; G21F5/00; G21F5/015
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
150 words
A housing for a radioactive source which is to be attached to a patient, comprising in combination: (a) a first shielding body having a protrusion, said protrusion containing a first recess for inserting said radioactive source therein, (b) a second shielding body having (b1) a second recess in the surface thereof, said second recess having a shape such that said protrusion fits therein, and (b2) a conical aperture communicating with said second recess, said radioactive source emitting radiation through said conical aperture when said source is inserted into said first recess and when said protrusion is located in said second recess; and (c) connecting means for connecting said first shielding body to said second shielding body when said radioactive source is inserted into said first recess and when said protrusion is located in said second recess, said radioactive source thereby emitting radiation into the environment primarily through said conical aperture.
Claim 2
Dependent Claim
150 words
A housing for a radioactive source which is to be attached to a patient, comprising in combination: (a) a first shielding body having a protrusion, said protrusion containing a first recess for inserting said radioactive source therein, (b) a second shielding body having (b1) a second recess in the surface thereof, said second recess having a shape such that said protrusion fits therein, and (b2) a conical aperture communicating with said second recess, said radioactive source emitting radiation through said conical aperture when said source is inserted into said first recess and when said protrusion is located in said second recess; and (c) connecting means for connecting said first shielding body to said second shielding body when said radioactive source is inserted into said first recess and when said protrusion is located in said second recess, said radioactive source thereby emitting radiation into the environment primarily through said conical aperture.
Claim 3
Dependent Claim
17 words
The housing according to claim 1, wherein said first and second shielding bodies are of cylindrical shape.
Claim 4
Dependent Claim
17 words
The housing according to claim 1, wherein said protrusion and said second recess are of cylindrical shape.
Claim 5
Dependent Claim
17 words
The housing according to claim 1, wherein said conical aperture has a cone angle of approximately 120°.
Claim 6
Dependent Claim
16 words
The housing according to claim 1, wherein said first and second shielding bodies comprise a metal.
Claim 7
Dependent Claim
11 words
The housing according to claim 5, wherein said metal contains tungsten.
Claim 8
Dependent Claim
12 words
The housing according to claim 1, wherein said radioactive source contains americium.
Claim 9
Dependent Claim
42 words
The housing according to claim 1 for a radioactive source having the form of an elongated rod, one end of said rod containing a radioactive substance, comprising a channel-shaped first recess in said first shielding body for mounting said radioactive source therein.
Claim 10
Dependent Claim
46 words
The housing according to claim 8, wherein said protrusion and said second recess are of cylindrical shape, wherein said channel-shaped first recess is open at one end, and wherein said rod end containing said radioactive stubstance is located in the central portion of said cylindrical protrusion.
Claim 11
Dependent Claim
26 words
The housing according to claim 9, wherein said channel-like first recess merges into a channel-like third recess located in the central portion of said cylindrical protrusion.
Claim 12
Dependent Claim
50 words
The housing according to claim 1, wherein said second shielding body has a first end face and a second end face opposite to said first end face, wherein said second recess is provided in said first end face, and wherein said conical aperture is provided in said second end face.
References Cited (Backward Citations)
US2700111A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |