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US4789831A
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Producing pseudocolor magnetic resonance images
Assignee: Philips North America LLC
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Filing: 1987-01-23
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Granted: 1988-12-06
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Expires: 2007-01-23
Abstract
Abstract A method for displaying the values of two parameter at a plurality of points in an image. The intensity of each pixel in the display is modulated in accordance with the value of the first parameter at corresponding points in the image. The hue of each pixel is modulated to a first color whenever the value of the second parameter at the corresponding point in the image is greater than a reference value and to a second color whenever the value of the second parameter is less than the reference value. The saturation at each pixel is modulated as a function of the absolute value of the deviation of the second parameter from the reference value at the corresponding point in the image.
Inventors
- 👤 William T. Mayo, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:19
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/02; G09G5/06; G01; G01R; G01R33/00; G01R33/20; G01R33/44; G01R33/48; G01R33/54; G01R33/56; G01S; G01S15/00; G01S15/88; G01S15/89; G01S15/8906; G01S15/895; G01S15/8954; G01S7/00; G01S7/52; G01S7/52017; G01S7/52053; G01S7/52057; G01S7/52071
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
A method for producing a magnetic resonance image for simultaneously visualizing independent first and second parameters in a field of data comprising the steps of: modulating the intensity of pixels of an image in accordance with the value of said first parameter at a corresponding location in the field; modulating the hue of said pixel to a first color when the value of said second parameter at the corresponding location in the field is greater than a reference value and modulating the hue of said pixel to a second color when said value of the second parameter is less than the reference value; and modulating the saturation of the color of the pixel in proportion to the absolute value of the deviation of the second parameter from the reference value at the corresponding location in the field; wherein the first parameter is located magnetic resonance spin echo intensity and the second parameter is local magnetic resonance relaxation time.
Claim 2
Independent Claim
158 words
A method for producing a magnetic resonance image for simultaneously visualizing independent first and second parameters in a field of data comprising the steps of: modulating the intensity of pixels of an image in accordance with the value of said first parameter at a corresponding location in the field; modulating the hue of said pixel to a first color when the value of said second parameter at the corresponding location in the field is greater than a reference value and modulating the hue of said pixel to a second color when said value of the second parameter is less than the reference value; and modulating the saturation of the color of the pixel in proportion to the absolute value of the deviation of the second parameter from the reference value at the corresponding location in the field; wherein the first parameter is located magnetic resonance spin echo intensity and the second parameter is local magnetic resonance relaxation time.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein the second parameter is T1.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein the second parameter is T2.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the second parameter is the difference between T1 AND T2.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein the second parameter is the mean of T1 and T2.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-06 | 1992-06-06 | 1992-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-06 | 1996-06-06 | 1996-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-06 | 2000-06-06 | 2000-12-06 | $7700.00 | Window Closed / Lapsed |