SLEEP QUALITY INDICATORS
First Claim
Patent Images
1. A method for diagnosis, comprising:
- acquiring a physiological signal from a patient during a period of sleep;
segmenting the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum;
computing respective levels of membership of the segments in a plurality of frequency states responsively to the respective frequency spectrum; and
displaying a plot indicative of the levels of membership of the segments in the sequence over time.
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Abstract
A method for diagnosis includes acquiring a physiological signal from a patient (22) during a period of sleep, and segmenting the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum. Respective levels of membership of the segments in a plurality of frequency states are computed responsively to the respective frequency spectrum. Based on the respective levels of membership, a sleep quality indicator is determined and displayed, responsively to a statistical characteristic of the segments.
109 Citations
93 Claims
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1. A method for diagnosis, comprising:
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acquiring a physiological signal from a patient during a period of sleep; segmenting the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum; computing respective levels of membership of the segments in a plurality of frequency states responsively to the respective frequency spectrum; and displaying a plot indicative of the levels of membership of the segments in the sequence over time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for diagnosis, comprising:
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acquiring a physiological signal from a patient during a period of sleep; segmenting the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum; computing a fundamental frequency of each segment in the time sequence responsively to a moment of the respective frequency spectrum of the segment; and displaying a plot showing the fundamental frequency of the segments in the sequence over time. - View Dependent Claims (10, 11, 12)
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13. A method for diagnosis, comprising:
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acquiring a physiological signal from a patient during a period of sleep; segmenting the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum; computing respective levels of membership of the segments in a plurality of frequency states responsively to the respective frequency spectrum; based on the respective levels of membership, determining a sleep quality indicator responsively to a statistical characteristic of the segments; and displaying the sleep quality indicator. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for diagnosis, comprising:
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acquiring a physiological signal from a patient during a period of sleep; segmenting the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum; computing respective levels of membership of the segments in a plurality of frequency states responsively to the respective frequency spectrum; responsively to the respective levels of membership, assigning each of at least some of the segments to one of a waking state and a sleep state responsively to the frequency spectrum; and displaying an accumulation plot showing a cumulative assignment of the segments to the waking and sleep states over time. - View Dependent Claims (29, 30, 31)
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32. Diagnostic apparatus, comprising:
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a sensor, which is adapted to acquire a physiological signal from a patient during a period of sleep; and a diagnostic processor, which is adapted to segment the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum, to compute respective levels of membership of the segments in a plurality of frequency states responsively to the respective frequency spectrum, and to display a plot indicative of the levels of membership of the segments in the sequence over time. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39)
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40. Diagnostic apparatus, comprising:
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a sensor, which is adapted to acquire a physiological signal from a patient during a period of sleep; and a diagnostic processor, which is adapted to segment the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum, to compute a fundamental frequency of each segment in the time sequence responsively to a moment of the respective frequency spectrum of the segment, and to display a plot showing the fundamental frequency of the segments in the sequence over time. - View Dependent Claims (41, 42, 43)
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44. Diagnostic apparatus, comprising:
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a sensor, which is adapted to acquire a physiological signal from a patient during a period of sleep; and a diagnostic processor, which is adapted to segment the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum, to compute respective levels of membership of the segments in a plurality of frequency states responsively to the respective frequency spectrum, to determine, based on the respective levels of membership, a sleep quality indicator responsively to a statistical characteristic of the segments, and to display the sleep quality indicator. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. Diagnostic apparatus, comprising:
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a sensor, which is adapted to acquire a physiological signal from a patient during a period of sleep; and a diagnostic processor, which is adapted to segment the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum, to compute respective levels of membership of the segments in a plurality of frequency states responsively to the respective frequency spectrum, to assign each of at least some of the segments, responsively to the respective levels of membership, to one of a waking state and a sleep state responsively to the frequency spectrum, and to display an accumulation plot showing a cumulative assignment of the segments to the waking and sleep states over time. - View Dependent Claims (60, 61, 62)
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- 63. A computer software product, comprising a computer-readable medium in which program instructions are stored, which instructions, when read by a computer, cause the computer to acquire a physiological signal from a patient during a period of sleep, to segment the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum, to compute respective levels of membership of the segments in a plurality of frequency states responsively to the respective frequency spectrum, and to display a plot indicative of the levels of membership of the segments in the sequence over time.
- 71. A computer software product, comprising a computer-readable medium in which program instructions are stored, which instructions, when read by a computer, cause the computer to acquire a physiological signal from a patient during a period of sleep, to segment the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum, to compute a fundamental frequency of each segment in the time sequence responsively to a moment of the respective frequency spectrum of the segment, and to display a plot showing the fundamental frequency of the segments in the sequence over time.
- 75. A computer software product, comprising a computer-readable medium in which program instructions are stored, which instructions, when read by a computer, cause the computer to acquire a physiological signal from a patient during a period of sleep, to segment the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum, to compute respective levels of membership of the segments in a plurality of frequency states responsively to the respective frequency spectrum, to determine, based on the respective levels of membership, a sleep quality indicator responsively to a statistical characteristic of the segments, and to display the sleep quality indicator.
- 90. A computer software product, comprising a computer-readable medium in which program instructions are stored, which instructions, when read by a computer, cause the computer to acquire a physiological signal from a patient during a period of sleep, to segment the signal to define a time sequence of quasi-stationary segments, each of the segments having a respective frequency spectrum, to compute respective levels of membership of the segments in a plurality of frequency states responsively to the respective frequency spectrum, to assign each of at least some of the segments, responsively to the respective levels of membership, to one of a waking state and a sleep state responsively to the frequency spectrum, and to display an accumulation plot showing a cumulative assignment of the segments to the waking and sleep states over time.
Specification