摘要:
A method and system for detecting block and zone misalignment of feature positions within a microarray-data set and for correcting feature positions for block or zone misalignment. In one embodiment of the present invention, displacement vectors representing the vector differences between observed positions of features and expected positions for the features of a microarray are calculated, based on an initially determined coordinate system. Features within a microarray data set are then partitioned with respect to the calculated vector displacements, so that features misaligned by a common rotation or translation are partitioned into a separate partition. A correction for each common misalignment can then be calculated and applied to the features of each partition.
摘要:
A method and system for cropping a digital image of multiple individual microarrays. Various embodiments of the present invention include, a digital image of multiple individual microarrays projected along a first coordinate axis by summing columns of pixel intensity values. A transformation maps the projected pixel intensity values to a transform in a frequency domain. A filter function is constructed from a power spectrum of the transform and multiplied by the transform to obtain a filtered transform. The filtered transform is mapped back to the spatial domain to give the filtered, spatial-domain image. The filtered, spatial-domain image is used to determine the coordinates of boundaries separating the individual microarrays along the first coordinate axis. The multi-pack of microarrays is rotated, and the method may be repeated for a second coordinate axis that is perpendicular to the first coordinate axis. The boundaries are used to identify the boundaries separating individual microarrays.
摘要:
A microarray processing system provides to a user an ability to draw one or more contour lines around portions of the microarray considered by the user to be undamaged, non-defective, and otherwise not compromised and therefore suitable for feature extraction. The microarray processing system then constructs one or more rectangular regions of feature extractability based on the user-indicated subregions of feature extractability, and proceeds to extract data from the one or more rectangular regions of feature extractability.
摘要:
Biopolymeric array scanners that are capable of automatically selecting a dye specific scale factor to employ for a plurality of different dyes, as wells as methods for making and using the same, are provided. In many embodiments, the actual dye specific scale factor automatically selected by the scanner is one that is equal to a preset “master” scale factor, so that the scanner reads any supported dye using the same constant scale factor. The dye specific scale factor selection is typically made by reference to a collection of nominal scale factors for each member of the plurality of dyes. In using the subject scanners, a user simply inputs the one or more dyes being used in a given array assay, and the scanner automatically reads the array using an automatically chosen dye specific scale factor for the selected dyes. Also provided are methods of obtaining collections of nominal scale factors and computer readable mediums comprising the same. The subject invention finds use in a variety of different applications, including both genomics and proteomics applications.
摘要:
A method and system for determining a set of dye-normalization microarray probes that consistently hybridize to approximately the same number of target molecules in a wide range of sample solutions. The method of one embodiment of the method of the present invention generates a set of candidate probe molecules. The set of candidate probe molecules are arrayed on one or more replicate microarrays. Sample solutions are made from one or more tissues of one or more species. Microarray-base hybridization assays are conducted by using the replicate microarrays and different sample solutions. A subset of the candidate probe molecules that are functional for the microarray-base hybridization assays are determined.
摘要:
A method and system for estimating the background signal over an arbitrarily-sized region of a scanned image of a molecular array, including a background region surrounding the ROI corresponding to the feature. A bit mask is generated, based on a molecular-array, feature-based data set that includes pixel-based intensities and a list of features, including feature coordinates and feature ROI radii, to indicate those pixels in the scanned image of the molecular array corresponding to background, and those pixels in the scanned image of the molecular array corresponding to features and ROIs. An integrated intensity for a background region of arbitrary size and shape can be efficiently determined by selecting pixels within the background region that are indicated to be background pixels in the bit mask. By selecting background anuli of sufficient size to overlap with the background anuli of neighboring features, a relatively continuous function of background-signal-verusus-position can be obtained across the surface of a molecular array in order to examine non-local, background-signal-related phenomena.
摘要:
A method and system for monitoring the feature-extractability of microarrays by integrating control-feature blocks, or reference pattern blocks within a microarrray. The embedded control features comprise an array of pattern blocks, or reference pattern, in which each pattern block is composed of a set of microarray features arranged in a specific pattern of low-intensity and high-intensity features. Positive control features are designed to generate high-intensity signals following exposure of the microarray to a sample solution, and negative control features are designed to generate no signal or a low-intensity signal. The pattern blocks may be visually inspected to determine the feature extractability of a microarray prior to undertaking full, automated feature extraction, or may select a feature-extraction method based on an analysis of the reference pattern.
摘要:
Biopolymeric array scanners that are capable of automatically selecting a dye specific scale factor to employ for a plurality of different dyes, as wells as methods for making and using the same, are provided. In many embodiments, the actual dye specific scale factor automatically selected by the scanner is one that is equal to a preset “master” scale factor, so that the scanner reads any supported dye using the same constant scale factor. The dye specific scale factor selection is typically made by reference to a collection of nominal scale factors for each member of the plurality of dyes. In using the subject scanners, a user simply inputs the one or more dyes being used in a given array assay, and the scanner automatically reads the array using an automatically chosen dye specific scale factor for the selected dyes. Also provided are methods of obtaining collections of nominal scale factors and computer readable mediums comprising the same. The subject invention finds use in a variety of different applications, including both genomics and proteomics applications.
摘要:
A method and system for rectilinearizing an image of a double-density, microarray having a non-rectilinear, outermost feature-position arrangement. In a disclosed embodiment, an image of a microarray having a non-rectilinear, outermost, feature-position arrangement is obtained from the signal intensity data of a microarray of features. A coordinate scheme of horizontal and vertical grid lines is superimposed on the image in order to assign a coordinate location to each feature of the microarray. Three corner features of the microarray are selected and used to determine one or more feature positions to add to the non-rectilinear, outermost, feature-position arrangement to form a rectilinear, outermost, feature-position arrangement of the microarray features.