Method for analyzing mass spectra
First Claim
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1. A method for analyzing mass spectra, the method comprising:
- detecting signals including signal intensifies in a plurality of spectra, wherein each spectrum in the plurality of spectra comprises data representing signal strength as a function of time-of-flight, mass-to-charge ratio, or a value derived from time-of-flight or mass-to-charge ratio;
forming at least one signal cluster by clustering signals with similar times-of-flight, mass-to-charge ratios, or values derived from times-of-flights or mass-to-charge ratios;
determining a predetermined number of signals, wherein the predetermined number of signals represents a minimum number of signals for a selected signal cluster;
selecting one or more signal clusters from the plurality of signal clusters if the number of signals in a signal cluster meets or exceeds the predetermined number of signals and excluding one or more signal clusters from the plurality of signal clusters if the number of signals in a signal cluster is below the predetermined number of signals; and
selecting the times-of-flights, the mass-to-charge ratios, or the values derived from the times-of-flights or the mass-to-charge ratios of the selected one or more signal clusters.
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Abstract
A method that analyzes mass spectra using a digital computer is disclosed. The method includes entering into a digital computer a data set obtained from mass spectra from a plurality of samples. Each sample is, or is to be assigned to a class within a class set having two or more classes and each class is characterized by a different biological status. A classification model is then formed. The classification model discriminates between the classes in the class set.
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Citations
12 Claims
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1. A method for analyzing mass spectra, the method comprising:
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detecting signals including signal intensifies in a plurality of spectra, wherein each spectrum in the plurality of spectra comprises data representing signal strength as a function of time-of-flight, mass-to-charge ratio, or a value derived from time-of-flight or mass-to-charge ratio; forming at least one signal cluster by clustering signals with similar times-of-flight, mass-to-charge ratios, or values derived from times-of-flights or mass-to-charge ratios; determining a predetermined number of signals, wherein the predetermined number of signals represents a minimum number of signals for a selected signal cluster; selecting one or more signal clusters from the plurality of signal clusters if the number of signals in a signal cluster meets or exceeds the predetermined number of signals and excluding one or more signal clusters from the plurality of signal clusters if the number of signals in a signal cluster is below the predetermined number of signals; and selecting the times-of-flights, the mass-to-charge ratios, or the values derived from the times-of-flights or the mass-to-charge ratios of the selected one or more signal clusters. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A computer readable medium comprising:
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code for detecting signals including signal intensities in a plurality of spectra, wherein each spectrum in the plurality of spectra comprises data representing signal strength as a function of time-of-flight, mass-to-charge ratio, or a value derived from time-of-flight or mass-to-charge ratio; code for forming at least one signal cluster by clustering signals with similar times-of-flights, mass-to-charge ratios, or values derived from times-of-flights or mass-to-charge ratios; code for determining a redetermined number of signals, wherein the predetermined number of signals represents a minimum number of signals for a selected signal cluster; code for selecting one or more signal clusters from the plurality of signal clusters of the number of signals in a signal cluster meets or exceeds the predetermined number of signals and excluding one or more signal clusters from the plurality of signal clusters if the number of signals in a signal cluster is below the predetermined number of signals; and code for selecting the times-of-flights, the mass-to-charge ratios, or the values derived from the times-of-flights or the mass-to-charge ratios of the selected one or more signal clusters. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification