US6883963B2
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Method for exchanging detector modules in an X-ray detector in a computed tomograph
Assignee: Siemens Healthcare GmbH
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Filing: 2003-07-09
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Granted: 2005-04-26
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Expires: 2023-07-09
Abstract
Abstract A method is for exchanging a first detector module (m), in an X-ray detector in a computed tomograph having a module configuration a, for a second detector module (m′). The first detector module has an associated correction table (T S(a,m,x) ) for eliminating temperature-dependent signal changes, which is dependent on the respective module configuration of the detector and which is recreatable following the exchange of a detector module. For the first and second detector modules (m, m′) in a detector in a reference computed tomograph having the module configuration b, a respective correction table (T S(b,m,x ), T S(b,m′x) is created. Differences, preferably only in the area of the channels of the detector module which is to be exchanged, are ascertained. Finally, the new correction table (T S(a,m′,x) ) for operating the second detector module (m′) in the computed tomograph having the module configuration a is calculated by transferring the ascertained difference values to the old correction table (T S(a,m,x) ).
Inventors
- 👤 Stefan Nolewaika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:20
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/29; G01T1/2914; G01T1/2985; A; A61; A61B; A61B6/00; A61B6/02; A61B6/03; A61B6/032; A61B6/58; A61B6/582; A61B6/585
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
163 words
A method for exchanging a first detector module (m), including K channels (x) from k to j in an X-ray detector in a computed tomograph including a module configuration a with a total of M detector modules and K×M channels, for a second detector module (m′), wherein the first detector module includes an associated correction table (T S(a,m,x) ), for eliminating temperature-dependent signal changes, which is dependent on the respective module configuration of the detector and is recreatable following the exchange of a detector module, comprising: creating, for the first and second detector modules in a detector in a reference computed tomograph including the module configuration b, a respective correction table (T S(b,m,x) , T S(b,m′x) ; ascertaining difference values in the correction tables; and calculating a new correction table (T S(a,m′,x) ), for operating the second detector module (m′) in the computed tomograph including the module configuration a, by transferring the ascertained difference values to the old correction table (T S(a,m,x) ).
Claim 2
Independent Claim
163 words
A method for exchanging a first detector module (m), including K channels (x) from k to j in an X-ray detector in a computed tomograph including a module configuration a with a total of M detector modules and K×M channels, for a second detector module (m′), wherein the first detector module includes an associated correction table (T S(a,m,x) ), for eliminating temperature-dependent signal changes, which is dependent on the respective module configuration of the detector and is recreatable following the exchange of a detector module, comprising: creating, for the first and second detector modules in a detector in a reference computed tomograph including the module configuration b, a respective correction table (T S(b,m,x) , T S(b,m′x) ; ascertaining difference values in the correction tables; and calculating a new correction table (T S(a,m′,x) ), for operating the second detector module (m′) in the computed tomograph including the module configuration a, by transferring the ascertained difference values to the old correction table (T S(a,m,x) ).
Claim 3
Dependent Claim
118 words
The method as claimed in claim 1 , wherein individual values for the new correction table (T S(a,m′x) ) are calculated on the following basis: S a , m ′ , x = S b , m ′ , x + 1 K ( ∑ i = k j S a , m , i - ∑ i = k j S b , m , i ) where N is the number of channels of a detector module from channel k to j, S n,o,p corresponds to the correction value S for the module configuration n with the detector module o, and the channel x is an element of the channels k to j.
Claim 4
Dependent Claim
47 words
The method as claimed in claim 2 , wherein, in the event of failure of a channel (i) of the detector module (m) which is to be exchanged, the signal values (S) for the channel are calculated by at least one of interpolating and extrapolating adjacent channels.
Claim 5
Dependent Claim
47 words
The method as claimed in claim 1 , wherein, in the event of failure of a channel (i) of the detector module (m) which is to be exchanged, the signal values (S) for the channel are calculated by at least one of interpolating and extrapolating adjacent channels.
Claim 6
Dependent Claim
32 words
The method as claimed in claim 4 , wherein a channel (i) is regarded as being faulty if the measured signal values (S) for the channel (i) exceed a prescribed limit value.
Claim 7
Dependent Claim
36 words
The method as claimed in claim 4 , wherein the new correction table (T S(a,m′,x) ) is created by reverting to a correction table (T S(a,m,x) ) measurement which was created and archived prior to failure.
Claim 8
Dependent Claim
36 words
The method as claimed in claim 4 , wherein the new correction table (T S(a,m′,x) ) is created by reverting to a correction table (T S(b,m,x) ) measurement which was created and archived prior to failure.
Claim 9
Dependent Claim
32 words
The method as claimed in claim 1 , wherein a channel (i) is regarded as being faulty if the measured signal values (S) for the channel (i) exceed a prescribed limit value.
Claim 10
Dependent Claim
36 words
The method as claimed in claim 8 , wherein the new correction table (T S(a,m′,x) ) is created by reverting to a correction table (T S(a,m,x) ) measurement which was created and archived prior to failure.
Claim 11
Dependent Claim
36 words
The method as claimed in claim 8 , wherein the new correction table (T S(a,m′,x) ) is created by reverting to a correction table (T S(b,m,x) ) measurement which was created and archived prior to failure.
Claim 12
Dependent Claim
36 words
The method as claimed in claim 1 , wherein the new correction table (T S(a,m′,x) ) is created by reverting to a correction table (T S(a,m,x) ) measurement which was created and archived prior to failure.
Claim 13
Dependent Claim
39 words
The method as claimed in claim 11 , wherein the new correction table T S(a,m′,x) ) is created by reverting to a correction table (T S(a,m,x) ) measurement which was created and archived before the computed tomograph was delivered.
Claim 14
Dependent Claim
43 words
The method as claimed in claim 1 , wherein the new correction table (T S(a,m′,x) ) is created by reverting to a correction table (T S(b,m,x) ) measurement which was created and archived prior to failure, preferably before the computed tomograph was delivered.
Claim 15
Dependent Claim
39 words
The method as claimed in claim 13 , wherein the new correction table (T S(a,m′,x) ) is created by reverting to a correction table (T S(b,m,x) ) measurement which was created and archived before the computed tomograph was delivered.
Claim 16
Dependent Claim
20 words
The method as claimed in claim 1 , wherein the first and second detector modules are at the same position.
Claim 17
Dependent Claim
32 words
The method as claimed in claim 1 , wherein the differences in the correction tables are ascertained in an area of the channels of the detector module which is to be exchanged.
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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) | 2008-04-25 | 2008-10-25 | 2009-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-04-25 | 2012-10-25 | 2013-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-04-25 | 2016-10-25 | 2017-04-26 | $7700.00 | Window Closed / Lapsed |