Crosstalk Compensation in Multiplex PCR Analysis
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Solution Overview
Problem
Crosstalk between fluorescent signals from different dyes in multiplex PCR complicates accurate nucleic acid analysis, as existing methods fail to account for variations in dye concentrations, leading to inaccurate test results.
Innovation Solution
A nucleic acid analysis method and apparatus that detect and correct crosstalk signals by measuring differences in fluorescent intensity variations and estimating final threshold cycles, taking into account the concentrations of different fluorescent dyes used in PCR or microarray data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiplex PCR with multiple fluorescent dyes is used to amplify multiple target genetic materials, then the productivity and information content of the test increases, but crosstalk between adjacent wavelength bands causes measurement precision to deteriorate
Solution Approach 1:
The patent introduces a mathematical correction model as an intermediary between the raw fluorescent signal detection and the final nucleic acid quantification. This model calculates crosstalk coefficients between different dye channels and applies correction algorithms to eliminate the interference, allowing multiplex PCR to maintain both high productivity and measurement precision
Solution Approach 2:
The patent changes the parameters of signal processing by transforming raw fluorescent intensity values into corrected values through mathematical operations. By adjusting parameters such as crosstalk coefficients, threshold cycles, and intensity variations, the system resolves the contradiction between using multiple dyes and maintaining detection accuracy
2Device complexity
If standard crosstalk correction methods are applied without considering dye concentration differences, then the device complexity remains low, but the reliability of test results deteriorates due to inaccurate correction
Solution Approach 1:
The patent performs preliminary measurement of dye concentration differences before applying crosstalk correction. By determining the actual concentration ratios of fluorescent dyes in advance, the system establishes accurate correction factors that account for both crosstalk and concentration variations, thereby improving reliability without significantly increasing device complexity
Solution Approach 2:
The patent implements a feedback mechanism where the measured fluorescent intensity variations and calculated crosstalk coefficients are used to iteratively refine the correction process. This feedback loop ensures that the correction accurately reflects the actual dye concentrations and crosstalk levels, improving test result reliability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for more accurate nucleic acid analysis by compensating for crosstalk based on dye concentrations, improving the reliability of multiplex PCR results by reducing interference between fluorescent signals.
Implementation Method 1
different fluorescent dyes or probes has been introduced. In order to obtain a test result using multiplex PCR, filters for detecting certain wavelength bands of different colors of fluorescent light emitted from different fluorescent dyes are used.
Data Source
AI summary
A method of analyzing nucleic acid by compensating for crosstalk in polymerase chain reaction (PCR) data and other data, wherein crosstalk signals associated with multiple fluorescent dyes are corrected by using fluorescent intensity variations detected from a concentration difference of the fluorescent dyes, and apparatus for performing the method.