US5594772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computer tomography apparatus
Assignee: Toshiba Corp
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Filing: 1994-11-23
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Granted: 1997-01-14
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Expires: 2014-11-23
Abstract
Abstract A computer tomography apparatus of the present invention can select one of an ON state in which X-ray radiation is performed to continuously acquire projection data and an OFF state in which acquisition of projection data is stopped, and even in the OFF state, rotation of an X-ray tube is continued, thus allowing quick switching from the OFF state to the ON state.
Inventors
- 👤 Yusuke Toki
- 👤 Manabu Hiraoka
- 👤 Ichiro Yamagishi
- 👤 Hiroyuki Onuki
- 👤 Tatsuya Ban
- 👤 Tetsuro Hada
- 👤 Takeo Nabatame
- 👤 Masao Yamahana
- 👤 Masakuni Fujise
- 👤 Yoshihiko Aochi
- 👤 Makoto Hayashibara
- 👤 Masahiro Ozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:48
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/48; A61B6/481; A61B5/00; A61B5/24; A61B5/316; A61B5/318; A61B5/346; A61B5/349; A61B5/352; A61B6/02; A61B6/03; A61B6/032; A61B6/46; A61B6/461; A61B6/463; A61B6/482; A61B6/488; A61B6/50; A61B6/504; A61B6/027; A61B6/54; A61B6/541
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
176 words
A computer tomography apparatus comprising: an X-ray tube which is supported to be continuously rotatable around an object to be examined; rotation control means for controlling rotation of said X-ray tube; X-ray control means for controlling X-ray radiation from said X-ray tube; data acquisition means, arranged to face said X-ray tube to sandwich the object to be examined therebetween for acquiring projection data on the basis of an X-ray transmitted through the object to be examined; re-construction means for re-constructing tomographic image data on the basis of the projection data acquired by said data acquisition means; display means for displaying the re-constructed tomographic image data; input means, operated by an operator, for inputting an OFF signal during a scanning operation in which the X-ray is radiated, said X-ray tube is rotated and the projection data are acquired; and control means for controlling said X-ray control means to interrupt a radiation of the X-ray and controlling said rotation control means to continue the rotation of said X-ray tube during a time when the OFF signal is input.
Claim 2
Dependent Claim
176 words
A computer tomography apparatus comprising: an X-ray tube which is supported to be continuously rotatable around an object to be examined; rotation control means for controlling rotation of said X-ray tube; X-ray control means for controlling X-ray radiation from said X-ray tube; data acquisition means, arranged to face said X-ray tube to sandwich the object to be examined therebetween for acquiring projection data on the basis of an X-ray transmitted through the object to be examined; re-construction means for re-constructing tomographic image data on the basis of the projection data acquired by said data acquisition means; display means for displaying the re-constructed tomographic image data; input means, operated by an operator, for inputting an OFF signal during a scanning operation in which the X-ray is radiated, said X-ray tube is rotated and the projection data are acquired; and control means for controlling said X-ray control means to interrupt a radiation of the X-ray and controlling said rotation control means to continue the rotation of said X-ray tube during a time when the OFF signal is input.
Claim 3
Dependent Claim
79 words
An apparatus according to claim 1, further comprising: a couch for slidably supporting a top plate on which the object to be examined is placed; and couch control means for controlling a sliding operation of said top plate, in which said control means controls said couch control means to continuously slide said top plate with the rotation of said X-ray tube, so that said X-ray tube moves along a helical path when viewed from the object to be examined.
Claim 4
Dependent Claim
53 words
An apparatus according to claim 1, in which said re-construction means re-constructs the tomographic data each time a projection data set required for re-constructing single tomographic image data is acquired, and said display means displays the tomographic image data after an elapse of a predetermined time from acquisition of the projection data set.
Claim 5
Dependent Claim
31 words
An apparatus according to claim 1, in which said control means controls said X-ray control means to continue the radiation of X-ray until at least one projection data set are acquired.
References Cited (Backward Citations)
US4495645A
Cited
US4789929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-01-14 | 2000-07-15 | 2001-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-14 | 2004-07-15 | 2005-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-14 | 2008-07-15 | 2009-01-14 | $7700.00 | Window Closed / Lapsed |