Electronic Brachytherapy with Miniature X-ray Sources
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Solution Overview
Problem
Conventional radiation treatment methods, including brachytherapy, face challenges in delivering uniform or non-uniform radiation patterns selectively to target tissues while minimizing exposure to healthy tissues, and are cumbersome in the operating room due to handling of radioactive materials.
Innovation Solution
An electronic brachytherapy system utilizing a metal target material with an atomic number greater than 40, deposited on a substrate, and a miniature X-ray source with an X-ray attenuating coolant fluid, produces a uniform or non-uniform radiation pattern by varying the thickness and composition of containment structures, allowing for precise control of radiation distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional brachytherapy uses radioactive seeds to treat target tissue, then radiation dose can be delivered to the treatment area, but healthy tissue between or around the source and target may be irradiated and damaged
Solution Approach 1:
The invention segments the radiation source into multiple miniature X-ray sources arranged in arrays, allowing selective activation and positioning. This segmentation enables precise control over which areas receive radiation, delivering dose only to the treatment margin while sparing healthy tissue through controlled spatial distribution and rapid treatment cycles.
2Ease of operation
If electronic brachytherapy uses miniature X-ray sources to avoid radioactive handling, then operational complexity is reduced, but achieving uniform or non-uniform radiation patterns becomes more difficult
Solution Approach 1:
The invention employs dynamically controllable miniature X-ray sources that can be selectively activated and deactivated. The system uses electronic control to dynamically adjust which sources are active, enabling both uniform and non-uniform radiation patterns to be achieved on demand, combining ease of operation with precise radiation pattern control.
3Productivity
If radioactive material is handled in the operating room for brachytherapy, then treatment can be performed intraoperatively, but staff must leave the room and operator-controlled afterloading machines are required
Solution Approach 1:
The invention replaces the mechanical and operator-controlled afterloading system with an electronic brachytherapy system using miniature X-ray sources. This substitution eliminates the need for complex radioactive material handling mechanisms, operator-controlled afterloading machines, and staff evacuation protocols, enabling safe intraoperative treatment with simplified equipment.
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 effectively delivers a predetermined radiation dose to the treatment margin with rapid treatment times and minimal exposure to healthy tissues, achieving dose drop-off beyond the treatment area, thus optimizing radiation therapy.
Implementation Method 1
a layer of target material can produce reflection and transmission X-rays when struck by electrons from a cathode
Implementation Method 2
X-ray attenuating coolant fluid between the source and containment structure
Data Source
AI summary
The present invention pertains to a system for electronic brachytherapy wherein a layer of target material can produce reflection and transmission X-rays when struck by electrons from a cathode. An alternative system can have a fixed-size containment structure around a miniature X-ray source, with X-ray attenuating coolant fluid between the source and containment structure. A balloon can be around the fixed-size containment structure and can be inflated with an X-ray inert gas.