US4951201A
Expired / Lapsed
US
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Method of automatically determining imaged body posture in medical image display
Assignee: Fujifilm Holdings Corp
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Filing: 1988-04-20
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Granted: 1990-08-21
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Expires: 2008-04-20
Abstract
Abstract A distribution of an image signal read from a stimulable phosphor sheet and bearing a transmitted radiation image of a human body is determined along a horizontal direction across the image. Signal values of the distribution along the direction are accumulated, and the rate of change of the accumulated values is determined to find the imaged posture of the image. Alternatively, the separation or the average value of the distribution is determined, or the pattern of the distribution is compared with a plurality of reference signal distribution patterns. The derivative of second order of a function approximated by the distribution pattern may be checked for its sign, or the distribution pattern may be checked to determine whether it is of a one-valley form or a two-valley form.
Inventors
- 👤 Hideya Takeo
- 👤 Nobuyuki Tanaka
- 👤 Nobuyoshi Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:06
CPC Classifications
G; G06; G06T; G06T7/00; G06T7/70; G06T7/77; G06T7/73; G06T7/74; G06T2207/00; G06T2207/30; G06T2207/30004; Y; Y10; Y10S; Y10S250/00; Y10S250/909
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
88 words
A method of determining the imaged posture of a medical image, comprising the steps of: (i) determining a distribution of an image signal bearing a transmitted image of a human body, along a prescribed direction across the image; (ii) accumulating signal values of the distribution along said direction to find accumulated values at points along said direction; (iii) determining a rate of change of said accumulated values in a region along said direction; and (iv) determining the imaged posture of said image based on said rate of change.
Claim 2
Independent Claim
88 words
A method of determining the imaged posture of a medical image, comprising the steps of: (i) determining a distribution of an image signal bearing a transmitted image of a human body, along a prescribed direction across the image; (ii) accumulating signal values of the distribution along said direction to find accumulated values at points along said direction; (iii) determining a rate of change of said accumulated values in a region along said direction; and (iv) determining the imaged posture of said image based on said rate of change.
Claim 3
Dependent Claim
36 words
A method according to claim 1, wherein the sum or average value of signal values of respective pixel rows extending in a direction transverse to said direction is used as the distribution of said signal values.
Claim 4
Dependent Claim
30 words
A method according to claim 1, wherein a distribution of signal values of an array of pixels parallel to said direction is used as the distribution of said signal values.
Claim 5
Independent Claim
76 words
A method of determining the imaged posture of a medical image, comprising the steps of: (i) determining a distribution of an image signal bearing a transmitted image of a human body, along a prescribed direction across the image; (ii) determining the separation of said distribution according to one of a class separation approach, a correlative standard approach and a least square standard approach; and (iii) determining the imaged posture of said image based on said separation.
Claim 6
Independent Claim
76 words
A method of determining the imaged posture of a medical image, comprising the steps of: (i) determining a distribution of an image signal bearing a transmitted image of a human body, along a prescribed direction across the image; (ii) determining the separation of said distribution according to one of a class separation approach, a correlative standard approach and a least square standard approach; and (iii) determining the imaged posture of said image based on said separation.
Claim 7
Dependent Claim
36 words
A method according to claim 4, wherein the sum or average value of signal values of respective pixel rows extending in a direction transverse to said direction is used as the distribution of said signal values.
Claim 8
Dependent Claim
30 words
A method according to claim 4, wherein a distribution of signal values of an array of pixels parallel to said direction is used as the distribution of said signal values.
Claim 9
Independent Claim
73 words
A method of determining the imaged posture of a medical image, comprising the steps of: (i) determining a distribution of an image signal bearing a transmitted image of a human body, along a prescribed direction across the image; (ii) determining an average value of said distribution near a central region of the image in said direction; and (iii) determining the imaged posture of said image based on the magnitude of said average value.
Claim 10
Independent Claim
73 words
A method of determining the imaged posture of a medical image, comprising the steps of: (i) determining a distribution of an image signal bearing a transmitted image of a human body, along a prescribed direction across the image; (ii) determining an average value of said distribution near a central region of the image in said direction; and (iii) determining the imaged posture of said image based on the magnitude of said average value.
Claim 11
Dependent Claim
36 words
A method according to claim 7, wherein the sum or average value of signal values of respective pixel rows extending in a direction transverse to said direction is used as the distribution of said signal values.
Claim 12
Dependent Claim
30 words
A method according to claim 7, wherein a distribution of signal values of an array of pixels parallel to said direction is used as the distribution of said signal values.
Claim 13
Independent Claim
91 words
A method of determining the imaged posture of a medical image, comprising the steps of: (i) determining a distribution of an image signal bearing a transmitted image of a human body, along a prescribed direction across the image; (ii) determining a degree of matching between a pattern of said distribution and each of a plurality of basic signal distribution patterns which have been predefined and which each represent a different imaged posture of a human body; and (iii) determining the imaged posture of said image based on said degree of matching.
Claim 14
Independent Claim
91 words
A method of determining the imaged posture of a medical image, comprising the steps of: (i) determining a distribution of an image signal bearing a transmitted image of a human body, along a prescribed direction across the image; (ii) determining a degree of matching between a pattern of said distribution and each of a plurality of basic signal distribution patterns which have been predefined and which each represent a different imaged posture of a human body; and (iii) determining the imaged posture of said image based on said degree of matching.
Claim 15
Dependent Claim
36 words
A method according to claim 10, wherein the sum or average value of signal values of respective pixel rows extending in a direction transverse to said direction is used as the distribution of said signal values.
Claim 16
Dependent Claim
30 words
A method according to claim 10, wherein a distribution of signal values of an array of pixels parallel to said direction is used as the distribution of said signal values.
Claim 17
Independent Claim
106 words
A method of determining the imaged posture of a medical image, comprising the steps of: (i) determining a distribution of an image signal bearing a transmitted image of a human body, along a prescribed direction across the image; (ii) determining a mathematical function approximating a pattern of said distribution; (iii) thereafter, determining a derivative of second order of said function; (iv) checking whether said derivative of second order is of a positive or negative value in a predetermined region in the image; and (v) determining the imaged posture of said image based on whether said derivative of second order is of a positive or negative value.
Claim 18
Independent Claim
106 words
A method of determining the imaged posture of a medical image, comprising the steps of: (i) determining a distribution of an image signal bearing a transmitted image of a human body, along a prescribed direction across the image; (ii) determining a mathematical function approximating a pattern of said distribution; (iii) thereafter, determining a derivative of second order of said function; (iv) checking whether said derivative of second order is of a positive or negative value in a predetermined region in the image; and (v) determining the imaged posture of said image based on whether said derivative of second order is of a positive or negative value.
Claim 19
Dependent Claim
36 words
A method according to claim 13, wherein the sum or average value of signal values of respective pixel rows extending in a direction transverse to said direction is used as the distribution of said signal values.
Claim 20
Dependent Claim
30 words
A method according to claim 13, wherein a distribution of signal values of an array of pixels parallel to said direction is used as the distribution of said signal values.
Claim 21
Independent Claim
83 words
A method of determining the imaged posture of a medical image, comprising the steps of: (i) determining a distribution of an image signal bearing a transmitted image of a human body, along a prescribed direction across the image; (ii) detecting whether a pattern of said distribution is basically of a one-valley form or a two-valley form; and (iii) determining the imaged posture of said image based on whether a pattern of said distribution is basically of a one-valley form or a two-valley form.
Claim 22
Independent Claim
83 words
A method of determining the imaged posture of a medical image, comprising the steps of: (i) determining a distribution of an image signal bearing a transmitted image of a human body, along a prescribed direction across the image; (ii) detecting whether a pattern of said distribution is basically of a one-valley form or a two-valley form; and (iii) determining the imaged posture of said image based on whether a pattern of said distribution is basically of a one-valley form or a two-valley form.
Claim 23
Dependent Claim
36 words
A method according to claim 16, wherein the sum or average value of signal values of respective pixel rows extending in a direction transverse to said direction is used as the distribution of said signal values.
Claim 24
Dependent Claim
30 words
A method according to claim 16, wherein a distribution of signal values of an array of pixels parallel to said direction is used as the distribution of said signal values.
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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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |