Cell Activity Measurement via Shadow Imaging
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Solution Overview
Problem
Traditional methods for measuring cell activity are costly, require expensive equipment, and destroy the specimen, making continuous observation impossible without reagents.
Innovation Solution
A cell activity measurement apparatus using shadow imaging technology with a light-emitting element and image sensor to capture and analyze shadow images of cells within a fluidic channel, well plate, or cell chip, allowing for continuous observation without reagents and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional methods (ELISA, Western blots, Immunohistochemistry) are used to measure cell activity, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent creates a shadow image copy of the cell rather than directly analyzing the cell itself. The light source casts a shadow of the cell onto the image sensor, producing a two-dimensional shadow image that preserves cell activity information without requiring complex staining or labeling procedures. This copying approach simplifies the measurement system while maintaining measurement capability.
Solution Approach 2:
The patent replaces complex mechanical and chemical systems (microscopes, electrophoresis equipment, antibody labeling systems) with a simple optical shadow imaging system. By using light to create shadows and an image sensor to capture them, the system substitutes sophisticated mechanical analysis equipment with a straightforward optical-mechanical setup, dramatically reducing device complexity.
2Measurement precision
If traditional methods are used to measure cell activity, then measurement precision is improved, but cost increases significantly
Solution Approach 1:
The patent employs inexpensive components that can be easily manufactured and replaced: simple light sources (LEDs or other luminous elements), basic optical elements (lenses, mirrors), and standard image sensors. These components are far cheaper than the specialized equipment required for ELISA, Western blots, or immunohistochemistry, making the system economically viable while maintaining measurement precision.
Solution Approach 2:
By creating shadow image copies instead of requiring expensive reagents and specialized equipment, the system dramatically reduces material and equipment costs. The shadow image contains sufficient information for cell activity analysis without requiring costly antibodies, enzymes, or complex chemical reagents used in traditional methods.
3Measurement precision
If traditional methods are used to measure cell activity, then specific cell state detection is improved, but the specimen is destroyed making continuous observation impossible
Solution Approach 1:
The shadow image is a non-invasive copy of the cell's optical properties. Capturing the shadow does not alter or damage the cell, allowing the same cell to be observed repeatedly over time. This enables continuous monitoring of cell activity, proliferation, and state changes without the destructive sampling inherent in traditional methods.
Solution Approach 2:
The cell itself serves as the measurement object without requiring external reagents or processing. The cell's natural interaction with light (shadow casting) provides the measurement signal, eliminating the need for destructive staining, labeling, or chemical processing that would compromise cell viability and prevent continuous observation.
4Ease of operation
If shadow imaging is used to measure cell activity, then ease of operation and cost are improved, but measurement precision may be compromised
Solution Approach 1:
The system optimizes shadow image parameters (light wavelength, intensity, angle of incidence, image sensor resolution and positioning) to maximize the information content of the shadow. By carefully controlling these parameters, the simple shadow imaging technique achieves measurement precision sufficient for cell activity analysis while maintaining operational simplicity and low cost.
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 continuous, cost-effective observation and analysis of cell activity without destroying specimens or requiring expensive equipment, automating the process and reducing measurement errors.
Implementation Method 1
a light-emitting element positioned over the fluidic channel to emit light in a direction of the fluidic channel
Implementation Method 2
an image sensor positioned under the fluidic channel to capture a shadow image of the cell
Data Source
AI summary
The present invention relates to an apparatus that uses shadow images of cells to continuously measure cell activity at a high processing rate in order to provide cell activity and cell number results. According to one embodiment of the present invention, instead of a highly experienced examiner or technician using a microscope, ELISA reader, etc. having to collect various cell activity measurements and cell numbers, the collection of said information can be automated so as to reduce cost and largely reduce errors in measurements through the development of computer software coupled with hardware using low cost and compact optoelectronic components and simple image processing techniques.