Agilent Technologies, Inc.

Jayati Ghosh

John Frederick Corson

Bo U Curry

Debra A Sillman

Kenneth Lawrence Staton

Xiangyang Zhou

Glenda Choate Delenstarr

Charles David Troup

Svetlana Shchegrova

Andreas N Dorsel

Peter G Webb

Paul K Wolber

Eric M Leproust

Brian Jon Peter

Herbert F Cattell

Bill J Peck

Patrick James Collins

Anya Tsalenko

Arjun Vadapalli

Amir Ben-dor

Chetan D Jadhaw

A method for determining the ploidy of a test genome is provided. In some embodiments, the method may comprises: a) obtaining a plurality of ratios for polymorphisms that are distributed throughout a test genome, wherein each of the ratios is a ratio of the measured copy number of uncut allele in a polymorphic site relative to the measured copy number of the uncut allele in the reference sample; b) taking the log of the ratios and plotting a distribution of the reference corrected log ratios of the SNP probes; and c) determining the ploidy of said the genome based on the number of peaks in that distribution.

Method for determining ploidy of a cell

Methods, systems and computer readable media for controlling an instrument in communication with a host computer are provided. Operations of an instrument that must be completed on schedule are controlled via an embedded controller embedded in the instrument. A complete status packet is sent to a host computer from the embedded controller. Periodically, the embedded controller repeats the sending of a complete status packet to the host computer, wherein status values in the complete status packet are updated with each iteration of sending a complete status packet.

Instrument control system and methods

Methods, systems, and computer readable media for determining the quality of a CGH array, including calculating a spread of the derivative of log ratio value differences between consecutive probes representing consecutive positions along a chromosome, wherein ratio values are calculated from probe signals from a CGH array.

Method of characterizing quality of hybridized CGH arrays

A system and method of operating a data processing system to provide feature extraction from an image obtained from a plurality of chemical arrays is disclosed. The method includes bifurcating processing of the image by performing image processing and post-processing. The image processing includes processing parts of the image, each part corresponding to a different one of the arrays, in an automated batch process, to produce image-processed outputs that are different from the image and contain information extracted from the image. The post-processing includes processing the image-processed outputs according to different post-processing protocols with respect to different ones of those parts of the image corresponding to at least two of the arrays, to produce post-processed outputs. The method includes outputting at least one of the image-processed outputs and/or at least one of the post-processed outputs.

System and methods for automated processing of multiple chemical arrays

Methods, systems and computer readable media for removing trends in signal intensity values from features on a chemical array. Inputted signal values from features on the array are surface fitted to calculate a surface approximation. The surface approximation is normalized and used to de-trend the signal intensity values from the features.

Methods and systems for detrending signal intensity data from chemical arrays

Embodiments of the present invention include methods and systems for analysis of comparative genomic hybridization ('CGH') data, including CGH data obtained from microarray experiments.

Method and system for analysis of array-based, comparative-hybridization data

A method and system for determining a biopolymer array substrate thickness dependent optimal focus distance for scanning a molecular array by a molecular array scanner are provided. A reference substrate is automatically scanned at successively greater distances of the stage from a light gathering medium, such as an optical fiber, or z-positions, to produce data providing a functional relationship between z-position and measured signal intensities. The data is then processed by an array substrate thickness dependent focus-finding routine that selects an optimal focus-distance for data scans which is optimized for the thickness of the reference substrate. Also provided are methods of determining the thickness of a biopolymer array substrate using a position sensitive device (PSD) component of a biopolymer array scanner. Further methods include determining the thickness of said biopolymeric array and automatically selecting an optimal focus distance using the determined thickness and a calibration function on thickness versus optimal focus distance. The subject invention finds use in a variety of different applications, including both genomic and proteomic applications.

Biopolymer array substrate thickness dependent automated focus-distance determination method for biopolymer array scanners

Systems, methods and computer readable media for characterizing a chemical array. At least one metric indicative of accuracy of location of features on the chemical array by a feature extraction process used to extract signals from features of the chemical array may be generated, as well as additional metrics adapted to identify errors caused by a particular process used in generating the signals on the array. A quality control report may be generated to contain at least one metric indicative of accuracy of location and said at least one additional metric. Customized quality control reports may be generated by providing for user selection of at least one metric adapted to identify errors caused by a particular process used in generating signals on a chemical array, from plurality of metrics, and including such selections in the quality control report generated. Systems, methods and computer readable media are provided for characterizing a chemical array by generating metrics adapted to identify errors caused by a particular process used in generating the signals on the array, generating a quality control report containing at least one of the metrics, and outputting the quality control report.

System and methods for characterization of chemical arrays for quality control

A method and system for quantifying and correcting spatial-intensity trends for each channel of a microarray data set having one or more channels. The method and system of one embodiment of the present invention selects a set of features from each channel of the microarray data set. Based on the selected set of features, a surface is used to determine the intensities for all features in each channel of the microarray data set. Spatial-intensity trends within the microarray data set are quantified, based on the surface to the intensities for each channel of the microarray data set. After the surface has been determined, the spatial-intensity trend can be removed from the microarray data set.

Method and system for quantifying and removing spatial-intensity trends in microarray data

Automated methods and systems for determining an in-focus-distance for a position on the surface of a molecular array substrate using a molecular array scanner are provided. A signal from a first position of an array substrate is detected and noise is filtered out of the detected signal using a symmetrical filter to produce an in-focus-distance. In one embodiment, the in-focus-distance is utilized as an estimated in-focus-distance at a second position of the array substrate. The method finds use in maintaining the focus of a light source while scanning the array by the scanner. Also provided are methods of assaying a sample using the methods and systems of the invention, and kits for performing the invention. The subject invention finds use in a variety of different applications, including both genomics and proteomics applications.

Method for improved focus control in molecular array scanning by using a symmetrical filter to determine in-focus-distance

Optical scanner system approaches are described in which novel focusing approaches are provided. A control algorithm accounts for geometric variation of successive scans in opposite directions across a microarray slide or substrate in order to provide optimized focus. The feedback approach taught may involve PI or PID terms. In either type of control approach, a projected slope of the slide is calculated and followed back and forth outside a scan region of the array in exiting and entering fully adaptive focusing zones, respectively. During turn-around, the system may track a setpoint between the periods of following the extrapolated slope. Also provided are methods of using the subject system in a biopolymer array based application, including genomic and proteomic applications.

Bi-directional scanner control system

Methods for programming an array scanner to scan a plurality of biopolymer arrays are provided. In the subject methods, individual scanning parameters for at least two different arrays of the plurality of arrays to be scanned are selected and input into the array scanner prior to scanning the plurality arrays. The programmed scanner then scans the plurality of arrays according to the pre-selected scanning parametersAlso provided are scanners programmed according to the subject methods, as well as computer programming that provides for programming of scanners according to the subject methods. The subject methods and compositions find use in a variety of different applications, including both genomics and proteomics applications.

Scanning parameterization for biopolymeric array scanner

A method and system for preventing signal clipping in a molecular array scanner by adding an offset signal to the signal generated by the photodetectors and initial stages of signal processing within a molecular array scanner in order to promote the signal above the level where signal information is lost during analog-to-digital signal conversion and/or digital signal integration. A portion of the offset is then subtracted from the digital signal or integrated digital signals, leaving a smaller, constant offset that is reported to the user, stored in a data file, or otherwise made available for further correction during later molecular array data processing.

Signal offset for prevention of data clipping in a molecular array scanner

A method and system for determining a biopolymer array substrate thickness dependent optimal focus distance for scanning a molecular array by a molecular array scanner are disclosed. Also disclosed are methods of determining the thickness of a biopolymer array substrate using a position sensitive device (PSD) component of a biopolymer array scanner. Further methods include determining the thickness of said biopolymeric array and automatically selecting an optimal focus distance using the determined thickness and a calibration function on thickness versus optimal focus distance. The subject invention finds use in a variety of different applications, including both genomic and proteomic applications.

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Sunnyvale, CA, United States of America

Jayati Ghosh