Transparent Brachytherapy Applicator With Magnified Viewing and Shielding
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Solution Overview
Problem
Existing brachytherapy applicators are heavy, ergonomically awkward, and obstruct visibility due to metal construction, leading to operator fatigue and inaccurate placement, while also emitting unwanted bremsstrahlung radiation.
Innovation Solution
A therapeutic applicator with a wand portion and a module made of transparent, radiation-tolerant materials that includes a recess for the radiation source, providing enhanced visibility and shielding through a convex surface for magnification, and optionally incorporating a light source for improved visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If metal construction is used for the applicator, then radiation shielding capability is improved, but weight increases and ergonomics deteriorate
Solution Approach 1:
The applicator combines metal components (for radiation shielding at the distal end) with polymer components (for the handle and shaft). This composite construction provides adequate radiation shielding where needed while reducing overall weight and improving ergonomics for the operator.
2Object-affected harmful factors
If metal construction is used for the applicator, then radiation shielding capability is improved, but visibility of treatment site deteriorates
Solution Approach 1:
The applicator features local quality differentiation: the distal end contains metal for radiation shielding, while the handle and shaft are made of transparent or translucent polymer materials. This allows the operator to see through the applicator body to visualize the treatment site and radiation source placement while maintaining shielding capability where required.
3Object-affected harmful factors
If metal construction is used for the applicator, then radiation shielding capability is improved, but operator fatigue increases
Solution Approach 1:
The applicator combines metal components (for radiation shielding at the distal end) with polymer components (for the handle and shaft). This composite construction provides adequate radiation shielding where needed while reducing overall weight and improving ergonomics for the operator.
4Object-affected harmful factors
If metal construction is used for the applicator, then radiation shielding capability is improved, but surgical control and placement accuracy deteriorate
Solution Approach 1:
The applicator features local quality differentiation: the distal end contains metal for radiation shielding, while the handle and shaft are made of transparent or translucent polymer materials. This allows the operator to see through the applicator body to visualize the treatment site and radiation source placement while maintaining shielding capability where required.
5Power
If beta radiation source is used, then radiation therapy function is achieved, but bremsstrahlung radiation is generated
Solution Approach 1:
The patent acknowledges that bremsstrahlung radiation is generated as a byproduct of beta radiation interaction with the metal casing. While not eliminating this effect, the design provides appropriate shielding to protect personnel and converts the harmful interaction into a manageable characteristic of the device through proper material selection and geometry.
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 applicator allows for accurate and ergonomic placement of radiation sources, reducing operator fatigue and protecting medical personnel from radiation exposure by enhancing visibility and shielding.
Implementation Method 1
the transparent material of the body section allows visibility of a treatment site that is adjacent to the radiation source
Implementation Method 2
The convex surface may provide a magnification of a view that includes a region surrounding the recess
Implementation Method 3
The body section may have a thickness greater than a diameter of the radiation source which is sufficient to attenuate radiation being emitted from the radiation source
Implementation Method 4
the 90Sr/90Y source within these metal applicators emits beta radiation which interacts with its high-impedance (Z) metal casing to produce unwanted high-energy x-rays known as bremsstrahlung
Implementation Method 5
high energy bremsstrahlung 'braking radiation' is created when beta particles interact with all solids
Data Source
AI summary
A therapeutic applicator and method may include a wand portion and a module coupled to the wand portion. The module may have a body section and a recess positioned within the body section. The body section may include a prismatic member made of a transparent material and the body section may further include a convex surface. The convex surface may provide a magnification of a view that includes a region surrounding the recess. A radiation source may be positioned within the recess. The body section may have a thickness greater than a diameter of the radiation source which is sufficient to attenuate radiation being emitted from the radiation source while the transparent material of the body section allows visibility of a treatment site that is adjacent to the radiation source. The magnification of the view may fall in range between about 1.1 times to 50.0 times an unmagnified view.