X-Ray Fluorescence-Guided Radiotherapy for Tumor-Selective Dosing
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Solution Overview
Problem
Existing radiotherapy treatments cause significant damage to healthy tissues due to high radiation doses, limiting the effectiveness of cancer treatment and necessitating a need for improved systems that minimize adverse impacts on non-tumor regions.
Innovation Solution
A radiotherapy system utilizing an X-ray beam source, high-Z nanoparticles or fiducial markers, and XRF detectors to focus radiation on target organs, adjusting beam focus based on XRF emissions to maximize therapeutic dose to tumors while minimizing healthy tissue exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high levels of radiation are used to destroy cancer cells, then therapeutic effectiveness is improved, but damage to healthy tissue increases
Solution Approach 1:
The patent applies local quality by using high-Z nanoparticles specifically at the tumor site to enhance radiation absorption locally. The nanoparticles are selectively accumulated in the target organ, creating a localized zone of enhanced radiation effect precisely where needed, while surrounding healthy tissues receive only the baseline radiation dose without nanoparticle enhancement.
Solution Approach 2:
The high-Z nanoparticles serve as an intermediary substance that mediates between the external radiation source and the tumor cells. These nanoparticles absorb the incident radiation and re-emit it as fluorescence photons with higher linear energy transfer, effectively converting the radiation into a more potent form locally at the tumor site while protecting surrounding healthy tissues from direct high-dose exposure.
2Object-affected harmful factors
If radiation dose is reduced to minimize healthy tissue damage, then harm to healthy tissue is decreased, but therapeutic effectiveness is limited
Solution Approach 1:
The patent changes the physical parameter of radiation interaction by introducing high-Z nanoparticles with different atomic numbers than surrounding tissue. This parameter change alters the radiation absorption and emission characteristics locally, enabling enhanced therapeutic effect at lower overall radiation doses. The nanoparticles' high atomic number creates a significant difference in radiation interaction, allowing dose escalation specifically at the tumor site.
3Ease of operation
If conventional radiation delivery systems are used, then treatment can be administered, but precision in targeting tumor while sparing healthy tissue is insufficient
Solution Approach 1:
The patent implements feedback by using X-ray fluorescence detection to monitor nanoparticle distribution and tumor targeting in real-time. The system detects XRF photons emitted by the high-Z nanoparticles, providing feedback on whether the radiation is being delivered to the correct location with appropriate nanoparticle concentration, allowing for precise adjustment and verification of treatment accuracy.
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
The system enhances treatment efficacy by precisely targeting high-Z nanoparticles, reducing side effects and shortening therapy duration, while maintaining high therapeutic doses on tumors.
Implementation Method 1
high-Z nanoparticles/at least one high-Z fiducial marker absorbing said X-ray radiation and emitting X-ray fluorescence (XRF) photons
Implementation Method 2
optical means for converging and shaping said beam to a cone-shaped X-ray beam of photons which hit the target organ simultaneously
Data Source
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AI summary
A radiotherapy treatment system and method used for conducting radiographic X-ray imaging on a target organ during radiographic treatment. The system comprises (a) an x-ray beam source configurable to deliver an X-ray beam to a target organ, (b) optical means for converging and shaping said beam to a cone-shaped X-ray beam of photons which hit the target organ simultaneously, (c) multiple high-Z nanoparticles attachable to the target organ, said high-Z nanoparticles absorbing said X-ray radiation and emitting X-ray fluorescence (XRF) photons, (d) at least one XRF detector for detecting said XRF photons ejecting out of a patient's body, and (e) control means for controlling the radiotherapy treatment procedure. The x-ray beam is focusable on a section in the target organ where the concentration of said high-Z nanoparticles leading to a desirable emission of said XRF photons, and in case the emission of said XRF photons decreases, the x-ray beam is movable to refocus on the section in the target organ where the emission of said XRF photons is desirable.