Mobile X-ray Unit Phantom Dosimetry Beam Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mobile X-ray units face challenges in controlling the X-ray beam delivery, leading to difficulties in delineating the beam from the X-ray tube and the treated region on patients, which can result in poor treatment efficacy and increased medical treatment costs due to skin cancer incidence.
Innovation Solution
A phantom-based dosimetry system is integrated into the mobile X-ray unit, utilizing a solid phantom with skin-like features to perform real-time dosimetry checks, including percentage depth dose, beam flatness, and dose rate verification, using film, ionization chambers, or semiconductor detectors, connected to a digital readout unit for on-line data transfer and adjustment of the X-ray applicator settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a mobile X-ray unit is used for treating skin cancer, then treatment accessibility and speed are improved, but control precision and beam delineation deteriorate
Solution Approach 1:
A light source is introduced as an intermediary between the X-ray tube and the treatment area to project a visible light field that corresponds to the X-ray beam geometry. This light field serves as a visual mediator that allows operators to accurately delineate the beam boundaries and target region without compromising treatment speed, directly resolving the contradiction between mobile unit productivity and measurement precision
2Ease of operation
If existing mobile X-ray units are used, then treatment portability is improved, but treatment control and beam delineation deteriorate
Solution Approach 1:
The light source acts as a visual intermediary that provides real-time feedback on X-ray beam geometry and positioning. This mediator enables operators to maintain reliable treatment control despite the inherent limitations of mobile equipment, allowing accurate beam delineation and target positioning without sacrificing portability
3Device complexity
If no dosimetry system is used, then device complexity is reduced, but treatment safety and dose control deteriorate
Solution Approach 1:
A dosimetry system utilizing semiconductor detectors and digital readout is implemented to replace subjective visual assessment with objective electronic measurement. This substitution provides automated, real-time feedback on radiation dose delivery, ensuring safe and controlled treatment while maintaining relatively simple device architecture through integration of compact electronic components
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 phantom-based dosimetry system ensures precise and controlled X-ray beam delivery, improving treatment efficacy by providing real-time data for quality and safety control, reducing the risk of complications, and optimizing treatment planning and execution.
Implementation Method 1
an X-ray tube for generating an X-ray beam
Implementation Method 2
using film, ionization chambers, or semiconductor detectors
Implementation Method 3
using film, ionization chambers, or semiconductor detectors
Data Source
AI summary
One embodiment of the present disclosure is directed to a mobile X-ray unit. The mobile X-ray unit may include an X-ray applicator for emitting an X-ray beam for irradiating an object. The mobile X-ray unit may further include a phantom-based dosimetry system configured to perform a dosimetry check of the X-ray beam. The phantom-based dosimetry system may include two sets of dose meters, each set being positioned on a surface at a distinct depth. The mobile X-ray unit may also include a dosimetry control unit configured to receive measurements from the two sets of dose meters and determine whether the dosimetry check is passed based on the measurements.