Patent US3670719A successfully refreshed from Google Patents.
US3670719A
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US
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Catheter type semiconductor radiation detector
Assignee: Toshiba Corp
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Filing: 1969-10-22
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Granted: 1972-06-20
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Expires: 1989-10-22
Abstract
Abstract A catheter type semiconductor radiation detector for insertion into a living body includes an elongated, preferably cylindrical semiconductor radiation detector having a first detecting portion non-directionally sensitive to radiation in a direction perpendicular to the longitudinal axis of the detector and at least a second detecting portion directionally sensitive to radiation in the direction perpendicular to the longitudinal axis of the detector.
Inventors
- 👤 Tetsuji Kobayashi
- 👤 Seiichi Takayanagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:40
CPC Classifications
A; A61; A61B; A61B6/00; A47; A47F; A47F11/00; A47F11/06; A47F11/10; H; H10; H10F; H10F99/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
259 words
A catheter type semiconductor radiation detector comprising: a semiconductor radiation detector element adapted to be inserted into a living body; and a coaxial line having one end electrically connected to said detector element, the other end of said coaxial line extending so as to transmit a radiation detection signal generated by said detector element outwardly of the living body and to supply operating power to said detector element; the improvement wherein said detecting element comprises: an elongated member formed of semiconductor material of one conductivity type and extending in the direction of the longitudinal axis of said coaxial line; a first detecting portion of semiconductor material and having a conductivity type opposite to that of said elongated member, said first detecting portion extending around the entire circumference of a portion of the length of said elongated member, said first detecting portion being non-directionally sensitive to radiation in a direction perpendicular to the longitudinal axis of said elongated member; and a second detecting portion of semiconductor material and having a conductivity type opposite to that of said elongated member, said second detecting portion being formed apart from said first detecting portion and in a part of the circumference of said elongated member, said second detecting portion being directionally sensitive to radiation in said direction perpendicular to the longitudinal axis of said elongated member, P-N junctions being formed between the semiconductor material of said elongated member and said first and second detecting portions; said coaxial line having a number of cable leads each respectively connected to one of said detecting portions.
Claim 2
Dependent Claim
259 words
A catheter type semiconductor radiation detector comprising: a semiconductor radiation detector element adapted to be inserted into a living body; and a coaxial line having one end electrically connected to said detector element, the other end of said coaxial line extending so as to transmit a radiation detection signal generated by said detector element outwardly of the living body and to supply operating power to said detector element; the improvement wherein said detecting element comprises: an elongated member formed of semiconductor material of one conductivity type and extending in the direction of the longitudinal axis of said coaxial line; a first detecting portion of semiconductor material and having a conductivity type opposite to that of said elongated member, said first detecting portion extending around the entire circumference of a portion of the length of said elongated member, said first detecting portion being non-directionally sensitive to radiation in a direction perpendicular to the longitudinal axis of said elongated member; and a second detecting portion of semiconductor material and having a conductivity type opposite to that of said elongated member, said second detecting portion being formed apart from said first detecting portion and in a part of the circumference of said elongated member, said second detecting portion being directionally sensitive to radiation in said direction perpendicular to the longitudinal axis of said elongated member, P-N junctions being formed between the semiconductor material of said elongated member and said first and second detecting portions; said coaxial line having a number of cable leads each respectively connected to one of said detecting portions.
Claim 3
Dependent Claim
31 words
The radiation detector of claim 1 wherein said elongated member is N-type semiconductor material, said first detecting portion is P-type semiconductor material, and said second detecting portion is P-type semiconductor material.
Claim 4
Dependent Claim
26 words
The radiation detector of claim 1 wherein said elongated member is a cylindrical member and said perpendicular direction is the radial direction of said cylindrical member.
Claim 5
Dependent Claim
26 words
The radiation detector of claim 2 including a plurality of second detecting portions of said opposite conductivity type formed around half the circumference of said cylinder.
Claim 6
Dependent Claim
18 words
The radiation detector of claim 4 wherein said plurality of second detecting portions are spaced from each other.
References Cited (Backward Citations)
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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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |