Cell Analyzer N/C Ratio and DNA Content Analysis
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Solution Overview
Problem
Conventional cell analyzers face challenges in accurately determining precancerous lesions and cancer in uterine cervix cells, particularly in the basal layer, which are difficult to harvest and often result in inadequate detection of early-stage cancer progression.
Innovation Solution
A cell analyzer system that flows a measurement specimen through a flow cell, irradiates laser light to detect forward scattered light, side scattered light, and side fluorescence signals, and analyzes these signals to determine the presence of cancerous cells, using the N/C ratio and DNA content to assess cell harvesting appropriateness and cancer progression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional cell analyzers are used to detect optical information of cells, then the analysis can be automated, but the accuracy of detecting precancerous lesions and early-stage cancer is insufficient
Solution Approach 1:
The patent segments the detection process into multiple independent analysis components: N/C ratio calculation, DNA content analysis, cell cycle phase determination, and cancer risk classification. Each segment processes specific features independently and combines results to achieve comprehensive detection accuracy while maintaining system reliability.
Solution Approach 2:
The patent transforms raw optical information into multiple derived parameters including N/C ratio, DNA content, cell cycle phase indicators, and cancer risk scores. By changing parameters from direct optical measurements to biologically meaningful metrics, the system improves detection precision for precancerous lesions while maintaining reliable automated operation.
2Measurement precision
If basal layer cells are harvested for analysis, then early-stage cancer detection is improved, but the harvesting process becomes painful and difficult to perform
Solution Approach 1:
The patent extracts and analyzes multiple critical features (N/C ratio, DNA content, cell cycle phase) from the harvested cells to maximize diagnostic value from the available sample. By extracting comprehensive information from parabasal cells alone, the system achieves early cancer detection capability without requiring painful basal layer harvesting.
Solution Approach 2:
The patent uses parabasal cells as an intermediary population that is accessible through non-invasive harvesting yet retains sufficient diagnostic characteristics to indicate early-stage cancer. These intermediary cells serve as a proxy for basal layer status, enabling detection without direct basal cell sampling.
3Measurement precision
If multiple cell layers are analyzed for cancer detection, then detection accuracy is improved, but the complexity of the analysis system increases
Solution Approach 1:
The patent implements a universal analysis framework that processes multiple cell types (parabasal, intermediate, surface cells) through the same analytical pipeline. The system performs multiple functions including N/C ratio calculation, DNA content measurement, cell cycle analysis, and cancer classification using unified algorithms, reducing system complexity while maintaining high detection accuracy across different cell layers.
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
Enhances the accuracy of detecting precancerous lesions and cancer by effectively determining the appropriateness of cell harvesting and identifying neoplastic cells, allowing for early-stage cancer detection and improved treatment initiation.
Implementation Method 1
irradiating light on the measurement specimen flowing through the flow cell to acquire a scattered light signal
Implementation Method 2
acquire a scattered light signal and a fluorescence signal
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Provided are a cell analyzer, and a cell analysis method. A cell analyzer 1 includes a measurement device 2 for detecting information of each cell from a measurement specimen containing cells harvested from an epithelial tissue, and a data processing device 3 for determining appropriateness of the cell harvesting of parabasal cells and acquiring information related to canceration of the cell based on the information detected by the measurement device 2. The data processing device 3 displays on a display section a dialogue showing "cell harvesting inappropriate" when determined that the harvesting of parabasal cells is inappropriate.