US4850004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and system for acquiring computerized tomogram data
Assignee: Toshiba Corp
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Filing: 1988-04-05
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Granted: 1989-07-18
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Expires: 2008-04-05
Abstract
Abstract In computerized tomography apparatus having a radiation source and a detector, when the radiation source and the detector are rotated in a rotational direction, acquisition of computerized tomogram data takes place in accordance with a data acquiring direction. When the radiation source and the detector are rotated in a rotational direction opposite to the rotational direction, acquisition of the computerized tomogram data is also performed from a data acquiring direction opposite to the data acquisition direction, thereby agreeing with the position of imaginary source. The position of imaginary source is near a subject than that of the radiation source, so that a high resolution is obtained.
Inventors
- 👤 Yasuo Saito
- 👤 Yasuo Nobuta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:33
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/02; A61B6/03; A61B6/032; Y; Y10; Y10S; Y10S378/00; Y10S378/901
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
80 words
A method for acquiring computerized tomogram data of a subject by using a radiation source and a detector with channels, incorporated in a computerized tomography apparatus, the method comprising the steps of: switching a rotational direction of the radiation source and the detector; switching a data acquiring direction of the detector by switching the rotational direction of the radiation source; and, acquiring the computerized tomogram data of the subject in accordance with the switched data acquiring direction of the detector.
Claim 2
Independent Claim
80 words
A method for acquiring computerized tomogram data of a subject by using a radiation source and a detector with channels, incorporated in a computerized tomography apparatus, the method comprising the steps of: switching a rotational direction of the radiation source and the detector; switching a data acquiring direction of the detector by switching the rotational direction of the radiation source; and, acquiring the computerized tomogram data of the subject in accordance with the switched data acquiring direction of the detector.
Claim 3
Dependent Claim
26 words
A method according to claim 1, wherein acquisition of the computerized tomogram data is performed from end to end of the channels arranged in the detector.
Claim 4
Dependent Claim
51 words
A method according to claim 1, wherein the step of switching the data acquiring direction of the detector comprises a step of selecting the data acquiring direction of the detector so as to be in agreement between the rotational direction of the detector and the rotational direction of the radiation source.
Claim 5
Dependent Claim
26 words
A method according to claim 3, wherein acquisition of the computerized tomogram data is performed from end to end of the channels arranged in the detector.
Claim 6
Independent Claim
97 words
A system for acquiring computerized tomogram data of a subject by using a radiation source and a detector with channels, incorporated in a computerized tomography apparatus, the system comprising: first switching means for switching a rotational direction of the radiation source and the detector; second switching means for switching a data acquiring direction of the detector by the rotational direction of the radiation source switched by the first switching means; and, means for acquiring the computerized tomogram data of the subject, in accordance with the data acquiring direction of the detector switched by the second switching means.
Claim 7
Independent Claim
97 words
A system for acquiring computerized tomogram data of a subject by using a radiation source and a detector with channels, incorporated in a computerized tomography apparatus, the system comprising: first switching means for switching a rotational direction of the radiation source and the detector; second switching means for switching a data acquiring direction of the detector by the rotational direction of the radiation source switched by the first switching means; and, means for acquiring the computerized tomogram data of the subject, in accordance with the data acquiring direction of the detector switched by the second switching means.
Claim 8
Dependent Claim
26 words
A system according to claim 5, wherein acquisition of the computerized tomogram data is performed from end to end of the channels arranged in the detector.
Claim 9
Dependent Claim
42 words
A system according to claim 5, wherein the second switching means comprises means for selecting the data acquiring direction of the detector so as to be in agreement between the rotational direction of the detector and the rotational direction of the source.
Claim 10
Dependent Claim
26 words
A system according to claim 7, wherein acquisition of the computerized tomogram data is performed from end to end of the channels arranged in the detector.
References Cited (Backward Citations)
US4097744A
Cited
US4580219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |