US5946407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and method for scanning medical images using adjustable exposure time and brightness
Assignee: Siemens Computer Aided Diagnosis Ltd
•
Filing: 1997-03-06
•
Granted: 1999-08-31
•
Expires: 2017-03-06
Abstract
Abstract A system and method for diagnosis of living tissue diseases is described. The system includes a computer device for controlling its operation. An operator control device is coupled to the computer device. A viewing screen is coupled to the computer device for displaying digitized images of the living tissue. The operator, using the control device, selects desired portions of the digitized image for further image enhancement according to a desired image enhancement feature selectable from a plurality of image enhancement features. The image enhancement features include any combination of grey scale stretching, contrast enhancement based on logarithmic histogram equalization, spot enhancement and magnification. The system further includes means for visualization and quantification of micro-calcifications, and means for visualization and quantification of mass spiculations.
Inventors
- 👤 Philippe Bamberger
- 👤 Isaac Leichter
- 👤 Scott Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:42
CPC Classifications
G; G06; G06T; G06T5/00; G06T5/90; G06T5/94; G06T5/40; G06T2207/00; G06T2207/30; G06T2207/30004; G06T2207/30068
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
110 words
A system for scanning medical images, comprising: a microcomputer for controlling the operation of said system; a memory coupled to said microcomputer for storing a plurality of data at the direction of said microcomputer; a scanning device having adjustable exposure time and brightness coupled to said microcomputer, said scanning device when in operation mode, scanning an X-ray film to provide a digital image with pixels having grey level values based on optical density of corresponding points on said X-ray film, said scanning device scanning said X-ray film more than once while said microcomputer adjusts said exposure time and brightness on each scan to optimize a display characteristic of said image.
Claim 2
Independent Claim
110 words
A system for scanning medical images, comprising: a microcomputer for controlling the operation of said system; a memory coupled to said microcomputer for storing a plurality of data at the direction of said microcomputer; a scanning device having adjustable exposure time and brightness coupled to said microcomputer, said scanning device when in operation mode, scanning an X-ray film to provide a digital image with pixels having grey level values based on optical density of corresponding points on said X-ray film, said scanning device scanning said X-ray film more than once while said microcomputer adjusts said exposure time and brightness on each scan to optimize a display characteristic of said image.
Claim 3
Dependent Claim
61 words
The system of claim 1 wherein said microcomputer adjusts said exposure time and brightness on each scan to provide a digital image such that the difference between the highest and lowest grey level values in said digital image after a given number of scans is larger than the difference between the highest and lowest grey level values after the first scan.
Claim 4
Dependent Claim
85 words
The system according to claim 2 wherein said scanning device further comprises a calibration mode, said scanning device when in calibration mode repeatedly scans regions of a sample X-ray film, each region having a predetermined optical density value, each scan of each region having a different exposure time value and brightness value so that for each predetermined optical density a three dimensional table is produced, said dimensions being exposure time value, brightness value and resulting grey level value corresponding to said predetermined optical density value.
Claim 5
Dependent Claim
32 words
The system according to claim 3 wherein said memory during said calibration mode, stores a plurality of said three dimensional tables, each three dimensional table corresponding to a predetermined optical density value.
Claim 6
Dependent Claim
71 words
The system according to claim 4 wherein said computer during said operation mode after each scan estimates the highest and lowest optical density values corresponding to the exposure time and brightness value used during said scan based on said three dimensional tables and selects a combination of exposure time and brightness value such that the difference between grey level values corresponding to said highest and lowest optical density values is maximum.
Claim 7
Dependent Claim
17 words
The system according to claim 5 wherein said selection of exposure time and brightness avoids system saturation.
Claim 8
Independent Claim
78 words
A method for scanning medical images, comprising the steps of: coupling a scanning device having adjustable exposure time and brightness to a microcomputer device; scanning an X-ray film to provide a digital image with pixels having grey level values based on optical density of corresponding points on said X-ray film; repeating said step of scanning said X-ray film while said microcomputer adjusts said exposure time and brightness for each scan to optimize a display characteristic of said image.
Claim 9
Independent Claim
78 words
A method for scanning medical images, comprising the steps of: coupling a scanning device having adjustable exposure time and brightness to a microcomputer device; scanning an X-ray film to provide a digital image with pixels having grey level values based on optical density of corresponding points on said X-ray film; repeating said step of scanning said X-ray film while said microcomputer adjusts said exposure time and brightness for each scan to optimize a display characteristic of said image.
Claim 10
Dependent Claim
61 words
The method of claim 7 wherein said microcomputer adjusts said exposure time and brightness for each scan to provide a digital image such that the difference between the highest and lowest grey level values in said digital image after a given number of scans is larger than the difference between the highest and lowest grey level values after the first scan.
Claim 11
Dependent Claim
76 words
The method according to claim 8 further comprising the steps of: repeatedly scanning regions of a sample X-ray film, each region of said sampled X-ray film having a predetermined optical density value, each scan of each region having a different exposure time value and brightness value; generating a three dimensional table for each predetermined optical density, said dimensions being exposure time value, brightness value and resulting grey level value corresponding to said predetermined optical density value.
Claim 12
Dependent Claim
89 words
The method according to claim 9 further comprising the steps of: storing a plurality of said three dimensional tables, each three dimensional table corresponding to a predetermined optical density value; estimating the highest and lowest optical density values corresponding to the exposure time and brightness value used during each scan of said X-ray image based on said three dimensional tables; and selecting a combination of exposure time and brightness value such that the difference between grey level values corresponding to said highest and lowest optical density values is maximum.
Claim 13
Independent Claim
89 words
A method for scanning x-ray film, comprising the steps of: coupling a scanning device having one or more adjustable operating parameters to a microcomputer device; scanning an x-ray film to provide a digital image with pixels having grey levels based on optical density values of corresponding points on said x-ray film; repeating said step of scanning said x-ray film while said microcomputer adjusts at least one of said parameters for each of one or more subsequent scans of said x-ray film to optimize a display characteristic of said image.
Claim 14
Independent Claim
89 words
A method for scanning x-ray film, comprising the steps of: coupling a scanning device having one or more adjustable operating parameters to a microcomputer device; scanning an x-ray film to provide a digital image with pixels having grey levels based on optical density values of corresponding points on said x-ray film; repeating said step of scanning said x-ray film while said microcomputer adjusts at least one of said parameters for each of one or more subsequent scans of said x-ray film to optimize a display characteristic of said image.
Claim 15
Dependent Claim
19 words
The method of claim 11 wherein said operating parameters comprise one or more of brightness, exposure time, and contrast.
Claim 16
Dependent Claim
66 words
The method of claim 12 wherein said microcomputer adjusts one or more of said brightness, exposure time, and contrast for each scan to provide a digital image such that the difference between the highest and lowest grey level values in said digital image after a given number of scans is larger than the difference between the highest and lowest grey level values after the first scan.
Claim 17
Dependent Claim
46 words
The method of claim 12 further comprising: repeatedly scanning regions of a sample x-ray film, each region of said film having a predetermined optical density value, each scan of each region having a different value for one or more of said brightness, exposure time, and contrast.
Claim 18
Dependent Claim
40 words
The method of claim 14 further comprising generating a multi-dimensional table for each predetermined optical density, said dimensions being values of one or more of brightness, exposure time, contrast, and resulting grey level corresponding to said predetermined optical density value.
Claim 19
Dependent Claim
44 words
The method of claim 11 further comprising: repeatedly scanning regions of a sample x-ray film, each region of said film having a predetermined optical density value, each scan of each region having a different value for one or more of said adjustable operating parameters.
Claim 20
Dependent Claim
39 words
The method of claim 16 further comprising generating a multi-dimensional table for each predetermined optical density, said dimensions being values of said one or more adjustable operating parameters and resulting grey level corresponding to said predetermined optical density value.
Claim 21
Dependent Claim
63 words
The method of claim 11 wherein said microcomputer adjusts one or more of said operating parameters for each scan to provide a digital image such that the difference between the highest and lowest grey level values in said digital image after a given number of scans is larger than the difference between the highest and lowest grey level values after the first scan.
References Cited (Backward Citations)
US4955067A
Cited
US5084911A
Cited
US5163102A
Cited
US5515450A
Cited
US5157733A
Cited
US5179582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-30 | 2003-03-01 | 2003-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-30 | 2007-03-01 | 2007-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-30 | 2011-03-01 | 2011-08-31 | $7700.00 | Window Closed / Lapsed |