Real-time Tumor Perfusion Imaging During Radiation Therapy
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Solution Overview
Problem
Current methods lack the ability to non-invasively quantify tumor perfusion in real-time during radiation therapy delivery, hindering adaptive adjustments to treatment plans and chemotherapy administration.
Innovation Solution
A perfusion imaging system that includes an imaging device and processing module to collect and analyze perfusion information from tumors and healthy tissue during fractionated radiation therapy, allowing for intra-fractional adjustments to radiation therapy dosages based on real-time perfusion levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If radiation therapy is delivered statically without modification between fractions, then treatment plan simplicity is maintained, but treatment efficacy cannot be optimized based on real-time tumor response
Solution Approach 1:
The system performs preliminary imaging to establish baseline perfusion levels before radiation therapy begins, and continues monitoring throughout treatment. This preliminary and continuous data collection enables proactive treatment plan adjustments rather than reactive changes, resolving the contradiction by preparing adaptability infrastructure in advance
Solution Approach 2:
The system implements real-time feedback loops where perfusion imaging data is continuously acquired during radiation therapy, processed to determine tumor response, and used to dynamically adjust treatment plans. This closed-loop feedback mechanism enables treatment plan adaptability while managing complexity through automated processing algorithms
2Measurement precision
If non-invasive perfusion monitoring is implemented during radiation therapy, then real-time tumor response measurement is enabled, but system complexity and cost increase
Solution Approach 1:
The system replaces invasive mechanical monitoring methods with non-invasive optical imaging techniques. By using light-based perfusion imaging instead of catheter-based or surgical measurement approaches, the system achieves precise tumor perfusion measurement while reducing mechanical complexity and patient discomfort
Solution Approach 2:
The system introduces optical imaging as an intermediary method to indirectly measure tumor perfusion without direct contact with tumor tissue. This intermediary approach uses light absorption and scattering properties of blood to infer perfusion levels, achieving measurement precision while avoiding the complexity of direct tissue interrogation
3Productivity
If real-time perfusion imaging is performed during radiation therapy delivery, then intra-fractional treatment adaptation is possible, but treatment time and workflow complexity increase
Solution Approach 1:
The system performs perfusion imaging continuously or at multiple time points during radiation therapy delivery without interrupting the treatment workflow. This continuous monitoring approach enables real-time detection of tumor response while maintaining treatment delivery efficiency, resolving the contradiction by making the imaging process seamless rather than discrete and time-consuming
Solution Approach 2:
The system pre-processes imaging data during acquisition and uses real-time algorithms to quickly generate perfusion maps and treatment recommendations. By performing data processing and analysis in parallel with treatment delivery rather than sequentially, the system minimizes time loss while maintaining productivity
4Reliability
If radiation therapy dosage is adjusted based on perfusion levels, then treatment efficacy is improved, but risk of under-dosing tumor or over-dosing healthy tissue increases
Solution Approach 1:
The system adjusts radiation therapy dosage locally based on spatially-resolved perfusion imaging data. Different regions of the tumor receive different doses according to their individual perfusion characteristics, with hypoxic regions receiving higher doses and well-perfused regions receiving standard doses. This local quality approach improves treatment effectiveness while protecting healthy tissue through precision targeting
Solution Approach 2:
The system implements real-time feedback control where perfusion measurements during treatment guide dosage adjustments. By continuously monitoring tumor perfusion response and dynamically modifying radiation delivery accordingly, the system optimizes treatment effectiveness while minimizing harm to healthy tissue through closed-loop control
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 safe, non-invasive monitoring of tumor perfusion changes, providing valuable feedback for tailoring radiation and chemotherapy treatment plans to improve treatment efficacy and minimize damage to healthy tissue.
Implementation Method 1
Perfusion imaging techniques measure tissue concentration of hemoglobin, water, oxygen saturation and flow to obtain perfusion levels of a tumor during radiation therapy delivery
Data Source
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AI summary
A system and method for perfusion imaging includes an imaging device (122) configured to collect perfusion information from a target area. A processing module (110) is configured to determine perfusion levels of the target area based on the perfusion information. A planning module (114) is configured to provide a treatment plan for the target area by correlating the perfusion levels with treatment activities for the target area, wherein the treatment activities are adjusted based upon characteristics of the perfusion levels in the target area.