WO2008010221B1 - Method and system for signal processing - Google Patents
Method and system for signal processingInfo
- Publication number
- WO2008010221B1 WO2008010221B1 PCT/IL2007/000901 IL2007000901W WO2008010221B1 WO 2008010221 B1 WO2008010221 B1 WO 2008010221B1 IL 2007000901 W IL2007000901 W IL 2007000901W WO 2008010221 B1 WO2008010221 B1 WO 2008010221B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signals
- analog
- signal
- dimensional vector
- multiplexing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/341—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils
- G01R33/3415—Constructional details, e.g. resonators, specially adapted to MR comprising surface coils comprising arrays of sub-coils, i.e. phased-array coils with flexible receiver channels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
- G01R33/54—Signal processing systems, e.g. using pulse sequences ; Generation or control of pulse sequences; Operator console
- G01R33/56—Image enhancement or correction, e.g. subtraction or averaging techniques, e.g. improvement of signal-to-noise ratio and resolution
- G01R33/5608—Data processing and visualization specially adapted for MR, e.g. for feature analysis and pattern recognition on the basis of measured MR data, segmentation of measured MR data, edge contour detection on the basis of measured MR data, for enhancing measured MR data in terms of signal-to-noise ratio by means of noise filtering or apodization, for enhancing measured MR data in terms of resolution by means for deblurring, windowing, zero filling, or generation of gray-scaled images, colour-coded images or images displaying vectors instead of pixels
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- High Energy & Nuclear Physics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The invention provides a method and system for processing an n-dimensional vector of analog signals n analog signals (S1(t),…Sk(t),…Sn(t)). A non-singular linear transformation A is applied to the vector (S1(t),…Sk(t),…Sn(t)) to generate an n-dimensional vector of analog signals ( 1(t),… k(t),… n(t)). The analog signals 1(t) to n(t) are amplified to produce an n-dimensional vector of analog signals ( 1(t),… k(t),… n(t)).
Claims
1. A computer implemented method for processing an n-dimensional vector of analog signals (S1(Q5...Sk(t),...Sn(t)) of a variable t, n being an integer that is at least 2, comprising: (a) applying a non-singular linear transformation A to the vector
(Si(t),...Sk(t),...Sn(t)) to generate an n-dimensional vector of analog signals (σi(t),...σk(t),...σn(t)); and (b) amplifying each of the analog signals σ^t) to σn(t) to produce an n-dimensional vector of analog signals (∑i(t),...Σ k(t),.. -∑n(t)).
2. The method according to Claim 1 further comprising:
(a) digitizing the analog signals ∑^t) to ∑n(t) to produce an n- dimensional vector of digital signals (∑l 1(t),...∑'k(t),...∑'n(t)); and
(b) applying to the n-dimensional vector of digital signals (∑'i(t),. • -∑'k(t),. • -∑'n(t)) the linear transformation A"1.
3. The method according to Claim 1 or 2 wherein the signals S1(X) to Sn(Q have about the same signal to noise ratio.
4. The method according to any one of the previous claims wherein the signals S i(t), ... Sk(t), ... Sn(t) are uncorrelated.
5. The method according to Claim 1 wherein the step of amplifying each of the analog signals σi(t) to σn(t) is accomplished using a separate analog signal amplifier for each signal.
6. The method according to Claim 1 wherein the step of amplifying each of the analog signals σι (t) to σn(t) is accomplished using a single analog signal amplifier and multiplexing the signals to the amplifier.
7. The method according to Claim 6 wherein the multiplexing is time multiplexing.
8. The method according to Claim 6 wherein the multiplexing is signal encoded multiplexing.
9. The method according to Claim 8 wherein the signal encoding is frequency encoding.
10. The method according to any one of the previous claims wherein the signals S i (t) to Sn(t) are MRI signals.
11. The method according to any one of the previous claims wherein all entries of the matrix A are selected from -1 , 0, and 1.
12. The method according to Claimll wherein all entries of the matrix A are selected from 0, and 1.
13. The method according to any one of the previous claims wherein the matrix A has exactly one 0 in each row.
14. A system for processing an n-dimensional vector of analog signals (S ^t), ... Sk(t), ... Sn(t)), of a parameter t, n being an integer that is at least 2, comprising:
(a) an analog signal adder applying a non-singular linear transformation A to the vector (Si(t)5...Sk(t),...Sn(t)) to generate an n-dimensional vector of analog signals (σ1(t),...σk(t),...σn(t)); and (b) one or more analog signal amplifiers amplifying each of the analog signals σ^t) to σn(t) to produce an n-dimensional vector of analog signals (E1Ct)5...Σ k(t),...∑n(t)).
15. The system according to Claim 1 further comprising:
' (a) one or more analog to signal converters digitizing the analog signals ∑^t) to ∑n(t) to produce an n-dimensional vector of digital signals (∑'1(t),...∑'k(t),...∑'n(t)); and
(b) a digital signal adder applying to the n-dimensional vector of digital signals (∑'1(t)5...∑'k(t),...∑'n(t)) the linear transformation A"1.
16. The system according to Claim 14 or 15 wherein the signals Si(t) to Sn(t) have about the same signal to noise ratio.
17. The system according to any one of Claims 14 to 16 wherein the signals S1Ct),... Sk(t),... Sn(t) are uncorrelated.
18. The system according to Claim 14 comprising a separate analog signal amplifier for each signal, each analog signal amplifier amplifying a different one of the analog signals σ^t) to σn(t).
19. The system according to Claim 14 comprising a single analog signal amplifier and a multiplexer multiplexing the signals σ^t) to σn(t) to the amplifier.
20. The system according to Claim 19 wherein the multiplexing is time multiplexing.
5 21. The system according to Claim 19 wherein the multiplexing is signal encoded multiplexing.
22. The system according to Claim 21 wherein the signal encoding is frequency encoding.,
23. The system according to any one of Claims 14 to 22 wherein the signals Si(t) to 10 Sn(t) are MRI signals.
24. The system according to any one of Claims 14 to 23 wherein all entries of the matrix A are selected from -I5 0, and 1.
25. The system according to Claim24 wherein all entries of the matrix A are selected from 0, and 1.
15 26. The system according to any one of Claims 14 to 25 wherein the matrix A has exactly one 0 in each row.
27. A computer program comprising computer program code means for performing all the steps of Claim 1 when said program is run on a computer.
28. A computer program as claimed in Claim 28 embodied on a computer readable 0 medium.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL176906 | 2006-07-17 | ||
| IL176906A IL176906A0 (en) | 2006-07-17 | 2006-07-17 | Deterministic detection of signals in a detector array |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2008010221A1 WO2008010221A1 (en) | 2008-01-24 |
| WO2008010221B1 true WO2008010221B1 (en) | 2008-03-06 |
Family
ID=38566954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IL2007/000901 Ceased WO2008010221A1 (en) | 2006-07-17 | 2007-07-17 | Method and system for signal processing |
Country Status (2)
| Country | Link |
|---|---|
| IL (1) | IL176906A0 (en) |
| WO (1) | WO2008010221A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1412769A2 (en) * | 2001-06-18 | 2004-04-28 | MRI Devices Corporation | Method and apparatus for enhanced multiple coil mr imaging |
| US6735264B2 (en) * | 2001-08-31 | 2004-05-11 | Rainmaker Technologies, Inc. | Compensation for non-linear distortion in a modem receiver |
| DE10148445A1 (en) * | 2001-10-01 | 2003-04-30 | Siemens Ag | Signal evaluation method for magnetic resonance received signals and the corresponding receiving arrangement |
| US6788059B2 (en) * | 2002-05-17 | 2004-09-07 | General Electric Company | RF detector array for magnetic resonance imaging |
-
2006
- 2006-07-17 IL IL176906A patent/IL176906A0/en unknown
-
2007
- 2007-07-17 WO PCT/IL2007/000901 patent/WO2008010221A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| IL176906A0 (en) | 2007-05-15 |
| WO2008010221A1 (en) | 2008-01-24 |
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| Date | Code | Title | Description |
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