Plasma Reactor Amplifies LIBS Signal for Real-Time Medical Diagnostics
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Solution Overview
Problem
Current laser-induced breakdown spectroscopy (LIBS) techniques face challenges in increasing detection limits for elements and maintaining plasma duration, which limits their sensitivity and real-time analysis capabilities, especially in medical diagnostics like cancer diagnosis where precise and immediate chemical information is needed.
Innovation Solution
Integration of a plasma reactor unit that amplifies the plasma signal by controlling electron density and energy, combined with a medical diagnostic device that includes a laser-induced breakdown spectroscopy unit and an endoscopy unit, allowing for real-time analysis of tissue elements by comparing elemental ratios and using a probe to directly approach the diagnosis target.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If laser-induced breakdown spectroscopy is used to analyze element components in real time, then diagnostic speed is improved, but detection sensitivity and plasma signal duration are insufficient
Solution Approach 1:
The patent combines laser-induced breakdown spectroscopy with plasma reactor technology, merging two separate systems into an integrated diagnostic device. The plasma reactor unit is coupled with the LIBS system to amplify the plasma signal generated by laser irradiation, thereby maintaining real-time diagnostic capability while significantly improving detection sensitivity through plasma signal enhancement.
Solution Approach 2:
The invention uses a composite approach by integrating the plasma reactor unit with the LIBS system. The plasma reactor acts as an amplification stage that processes the plasma generated by LIBS, creating a composite analytical system that leverages the real-time capability of LIBS and the signal amplification capability of the plasma reactor.
2Measurement precision
If higher laser energy is used to increase plasma signal intensity, then detection limit is improved, but tissue damage increases
Solution Approach 1:
The plasma reactor unit serves as an intermediary between the laser irradiation and the detection system. It takes the weak plasma signal generated by low-energy laser irradiation and amplifies it through additional plasma generation and signal enhancement mechanisms, thereby achieving high detection sensitivity without requiring high laser energy that would cause tissue damage.
Solution Approach 2:
The invention changes the parameters of plasma generation by introducing a plasma reactor unit that operates at controlled conditions. Instead of relying solely on high laser energy to create intense plasma, the system uses the plasma reactor to modify plasma parameters (temperature, density, duration) to optimize signal intensity while maintaining low laser energy input and minimizing tissue damage.
3Measurement precision
If plasma duration is extended to improve signal reception, then measurement accuracy is improved, but plasma signal stability deteriorates
Solution Approach 1:
The plasma reactor unit employs periodic discharge cycles to generate and sustain plasma. By using controlled periodic discharges, the system maintains plasma for extended periods with consistent characteristics, improving measurement accuracy while maintaining signal stability through regular, predictable plasma regeneration cycles.
Solution Approach 2:
The invention achieves continuous plasma signal generation through the plasma reactor unit, which maintains plasma discharge continuously or in closely spaced periodic cycles. This continuous action ensures stable plasma conditions over extended measurement periods, allowing accurate measurements without signal degradation.
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 detection limit for each element and extends plasma duration, enabling real-time diagnosis of diseases such as cancer without excessive tissue damage, allowing for immediate analysis and potential minimization of excision sites during treatment.
Implementation Method 1
when a high-output laser beam is focused on a target specimen, plasma, which emits bright light such as breakdown, is formed at a focal point, and a high temperature is maintained
Implementation Method 2
plasma, which emits bright light such as breakdown, is formed at a focal point
Implementation Method 3
When predetermined time has elapsed, the atoms and the ions in the excited state emit energy and return back to the ground state. In this case, the emitted energy shows inherent wavelengths in accordance with the type of element and the excited state
Implementation Method 4
a plasma reactor unit which amplifies a first plasma, which is generated on the target specimen positioned at a focal point of the laser beam passing through the focusing lens, by controlling electron density and electron energy of the first plasma
Data Source
AI summary
A laser-induced breakdown spectroscope according to an exemplary embodiment of the present invention includes: a laser head which emits a laser beam; a focusing lens which focuses the laser beam on a target specimen; a plasma reactor unit which amplifies first plasma, which is generated on the target specimen positioned at a focal point of the laser beam passing through the focusing lens, by controlling electron density and electron energy of the first plasma; a collection lens which focuses second plasma amplified by the plasma reactor unit; and a spectrophotometer which analyzes the second plasma focused by the collection lens.