Flow Cytometer Spillover Compensation via Broad-Band Reference
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Solution Overview
Problem
Current flow cytometers face challenges in accurately measuring fluorescent dyes due to spillover and crosstalk between detection channels, requiring frequent recalibration of photodetector gains and compensation values, which is time-consuming and instrument-specific.
Innovation Solution
The method involves using predetermined 'calibrated spillover' values derived from a broad-band reference material to simplify instrument setup, allowing for independent adjustment of photodetector gains and calculation of compensation values, enabling accurate measurement of fluorescent reagent fluorescence emission and brightness across different instrument settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional spillover compensation methods are used with multiple photodetectors, then fluorescence measurements can be obtained, but spillover and crosstalk between detection channels occur requiring frequent recalibration
Solution Approach 1:
The patent applies preliminary action by pre-determining spillover values using a broad-band reference material before actual fluorescence measurements. The system stores these spillover values and uses them to automatically compensate for channel crosstalk during measurements, eliminating the need for frequent manual recalibration while maintaining measurement precision
Solution Approach 2:
The system implements self-service through automatic spillover compensation using stored predetermined values. The instrument automatically applies compensation calculations based on the pre-determined spillover matrix, eliminating manual intervention for recalibration and enabling the system to self-correct for channel crosstalk throughout operation
2Measurement precision
If photodetector gains are adjusted to optimize fluorescence detection, then measurement sensitivity improves, but spillover values change requiring recalibration
Solution Approach 1:
The patent applies parameter changes by using a broad-band reference material that emits across multiple detection channels. By measuring this reference material at different photodetector gain settings, the system pre-determines spillover values that are then stored and automatically applied, allowing gain optimization without increasing calibration complexity
Solution Approach 2:
The system performs preliminary determination of spillover values across multiple gain settings before actual measurements. These pre-calculated values are stored in memory and automatically retrieved during operation, eliminating the need to recalculate spillover when adjusting photodetector gains and simplifying the overall calibration procedure
3Adaptability or versatility
If multiple detection channels are used to detect different fluorescent dyes, then analytical capability increases, but spillover and crosstalk between channels occur
Solution Approach 1:
The patent introduces an intermediary approach by using a broad-band reference material that spans all detection channels. This reference material serves as a mediator to pre-determine the spillover characteristics between all channel pairs, which are then stored and automatically applied to correct crosstalk in multi-dye measurements, maintaining both versatility and precision
4Measurement precision
If instrument setup requires determination of spillover values for each photodetector setting, then measurement accuracy is maintained, but setup time increases
Solution Approach 1:
The system applies preliminary action by pre-determining spillover values using a broad-band reference material before actual fluorescence measurements. These predetermined values are stored in the instrument's memory and automatically retrieved during measurements, eliminating repeated setup procedures and significantly improving instrument setup efficiency while maintaining measurement accuracy
Solution Approach 2:
The instrument implements self-service by automatically retrieving and applying stored spillover values during measurements. The system self-corrects for channel crosstalk using pre-determined compensation values, eliminating manual setup procedures and improving productivity without sacrificing measurement precision
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 simplifies the setup and operation of flow cytometers by allowing for gain-independent spillover value determination, reducing the need for frequent recalibration and enabling seamless substitution of reagents and reference materials, thus improving measurement accuracy and efficiency.
Implementation Method 1
measuring the fluorescence emissions from the reference material in each of a multiplicity of detection channels
Data Source
AI summary
The present invention reagents and methods for setting up an instruments having a multiplicity of detector channels for analyzing a multiplicity of fluorescent dyes. The present invention is particularly applicable in the field of flow cytometry.