EP0119664A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Tomography data acquisition system
Assignee: Siemens AG
•
Filing: 1984-03-16
•
Granted: —
•
Expires: 2004-03-16
Abstract
Abstract A tomography data acquisition system in which the signal processing of signals from a radiation detector is a function of the angular position of the detector relative to a center path from the radiation source through the center of a tomography subject, and which results in system hardware savings. The information content of detector signals derived from radiation paths progressively outward from the center path is progressively less than the information content of detector signals derived from the central radiation path. The sampling rate of the outward detector signals can be lower without loss of information. The resolution of the outward detector signals can also be lower, and as desired, either the sampling rate or the resolution or both can be varied in accordance with the position of the detector in relation to the center path.
Inventors
- 👤 John Mcg. Dobbs
- 👤 Bernard M. Gordon
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 20:10
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/42; A61B6/4275; A61B6/02; A61B6/03; A61B6/032
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
For use in a tomography system which includes a radiation source and a radiation detector, a data acquisition system comprising: means operative to provide digitized representations of the output signals of said detector; and means operative to provide a sampling rate and/or resolution of the digitized representations of the detector signals which are a function of the position of the detected rays relative to a reference line from the radiation source through the center of a tomography subject.
Claim 2
Dependent Claim
78 words
For use in a tomography system which includes a radiation source and a radiation detector, a data acquisition system comprising: means operative to provide digitized representations of the output signals of said detector; and means operative to provide a sampling rate and/or resolution of the digitized representations of the detector signals which are a function of the position of the detected rays relative to a reference line from the radiation source through the center of a tomography subject.
Claim 3
Dependent Claim
83 words
For use in a tomography system which includes a radiation source and at least one radiation detector, a data acquisition system comprising: means operative to provide digitized signal representations of detector signals corresponding to respective radiation paths through a tomography subject; and means operative to provide a sampling rate and/or resolution of the digitized signal representations which are a function of the position of the detected rays relative to a reference line from the radiation source through the center of a tomography subject.
Claim 4
Dependent Claim
83 words
For use in a tomography system which includes a radiation source and at least one radiation detector, a data acquisition system comprising: means operative to provide digitized signal representations of detector signals corresponding to respective radiation paths through a tomography subject; and means operative to provide a sampling rate and/or resolution of the digitized signal representations which are a function of the position of the detected rays relative to a reference line from the radiation source through the center of a tomography subject.
Claim 5
Dependent Claim
102 words
For use in a tomography system which includes a radiation source and a detector array disposed along a segment of an arc in spaced relation to the radiation source, a data acquisition system comprising: a first signal processor coupled to the detectors of the detector array within a central segment centered about a center line between the radiation source and the array; at least a second signal processor coupled to the detectors of the detector array within segments outward of each side of the central segment; the second signal processor having a sampling rate and/or resolution less than the first signal processor.
Claim 6
Dependent Claim
102 words
For use in a tomography system which includes a radiation source and a detector array disposed along a segment of an arc in spaced relation to the radiation source, a data acquisition system comprising: a first signal processor coupled to the detectors of the detector array within a central segment centered about a center line between the radiation source and the array; at least a second signal processor coupled to the detectors of the detector array within segments outward of each side of the central segment; the second signal processor having a sampling rate and/or resolution less than the first signal processor.
Claim 7
Dependent Claim
61 words
The system of claim 3 wherein the first and second signal processors each include analog-to-digital converter means providing sampled digital data representative of analog data derived from the detectors of the detector array; the analog-to-digital converter means of the second signal processor having a sampling rate less than the sampling rate of the analog-to-digital converter means of the first signal processor.
Claim 8
Dependent Claim
60 words
The system of claim 3 wherein the first and second signal processors each include analog-to-digital converter means providing sampled digital data representative of analog data derived from the detectors of the detector array; the analog-to-digital converter means of the second signal processor having a conversion resolution less than the resolution of the analog-to-digitial converter means of the first signal processor.
Claim 9
Dependent Claim
63 words
The system of claim 3 wherein the first and second signal processors each include analog-to-digital converter means providing sampled digital data representative of analog data derived from the detectors of the detector array; the analog-to-digital converter means of the second signal processor having a sampling rate and a conversion resolution less than those of the analog-to-digital converter means of the first signal processor.
Claim 10
Dependent Claim
22 words
The system of claim 3 wherein the angular resolution of detectors of said array is less for detectors at the outward segments.
Claim 11
Dependent Claim
104 words
For use in a tomography system which includes a radiation source and a detector array disposed along a segment of an arc in spaced relation to the radiation source, a data acquisition system comprising: means coupled to the detectors of the detector array within a central segment centered about a center line between the radiation source and the array; means coupled to the detectors of the detector array within a segment outward of each side of the central segment; the second means being operative to provide a sampling rate and/or resolution of digitized signal representations of the detector signals less than the first means.
Claim 12
Dependent Claim
104 words
For use in a tomography system which includes a radiation source and a detector array disposed along a segment of an arc in spaced relation to the radiation source, a data acquisition system comprising: means coupled to the detectors of the detector array within a central segment centered about a center line between the radiation source and the array; means coupled to the detectors of the detector array within a segment outward of each side of the central segment; the second means being operative to provide a sampling rate and/or resolution of digitized signal representations of the detector signals less than the first means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.