Induced Reporter Particle Aggregation for Point-of-Care Imaging
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Solution Overview
Problem
Existing point-of-care diagnostics face challenges in providing quick and accurate results due to the difficulty in miniaturizing benchtop instruments for biochemical assays, leading to delays and high costs associated with sending samples to laboratories for analysis.
Innovation Solution
The use of reporter particles, such as nanoparticles, that form aggregates in the presence of analytes, allowing for direct imaging and analysis of aggregate size to determine analyte concentration through image processing and filtering techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If benchtop instruments for biochemical assays are used, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex mechanical benchtop instruments with a simplified system using smartphone-based imaging and image processing algorithms. The assay reads are obtained through digital image analysis of color changes in microreactors, eliminating the need for sophisticated optical detection systems while maintaining measurement precision through computational methods.
2Measurement precision
If samples are sent to dedicated laboratories for analysis, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The system enables point-of-care testing where diagnostic assays are performed at the patient location using portable devices rather than requiring transport to centralized laboratories. The smartphone-based platform allows local execution of biochemical assays and immediate digital analysis, eliminating sample transport time and enabling rapid diagnostic decision-making.
3Device complexity
If benchtop instruments are miniaturized for portability, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent transitions from traditional optical detection in three-dimensional space to two-dimensional digital image capture on a smartphone sensor. By capturing assay color changes as 2D images and analyzing them through software algorithms, the system maintains measurement precision while achieving portability, as the dimensional reduction simplifies the optical path and eliminates complex alignment requirements.
4Ease of operation
If inexpensive portable devices are used, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The patent introduces computational image processing algorithms as an intermediary between the simple optical capture and the final diagnostic readout. The software performs color calibration, background subtraction, and quantitative analysis to compensate for the lower optical precision of smartphone cameras, thereby maintaining diagnostic accuracy while using inexpensive portable devices.
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
Enables rapid and accurate determination of analyte presence and concentration using affordable, portable devices, improving the speed and accuracy of diagnostic tests.
Implementation Method 1
the reporter particles form aggregates containing multiple reporter particles, and which thus appear in sample frames as larger objects
Implementation Method 2
The reporter particles (or alternately, 'reporters') produce a large enough optical signal so that individual reporter particles can be imaged
Data Source
AI summary
Provided herein are systems, devices and methods for the rapid and accurate measurement of analyte particles binding-induced aggregation of reporter particles. In the presence of analyte particles of interest, reporter particles form aggregates which increase in mean particle size as the concentration of analyte increases. From analysis of the mean particle size, determined from sample frames, the presence and/or concentration of analyte can be determined.