Mobile X-ray Unit Phantom Dosimetry and Light Indicator
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Solution Overview
Problem
Current mobile X-ray units lack effective control over the delineation of the X-ray beam, leading to challenges in precise treatment delivery and radiation safety, particularly in treating skin cancer which is increasingly prevalent and requires accurate dosimetry control.
Innovation Solution
A phantom-based dosimetry system is integrated into the mobile X-ray unit, featuring a premanufactured phantom with dose meters and alignment patterns, capable of real-time dosimetry checks, and a light indicator for visualizing the X-ray beam, ensuring accurate positioning and dose delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a portable X-ray unit is used for treating skin cancer, then treatment accessibility and speed are improved, but control over beam delineation and dosimetry precision deteriorate
Solution Approach 1:
A light indicator system is introduced as an intermediary between the X-ray applicator and the treatment area. The light indicator visually delineates the X-ray beam boundaries on the patient's skin, providing real-time feedback for precise positioning without requiring complex mechanical control mechanisms, thus maintaining portability while improving dosimetry precision.
2Area of stationary object
If the X-ray applicator is positioned at a distance from the patient's skin, then treatment coverage is improved, but beam control and positioning accuracy deteriorate
Solution Approach 1:
The light indicator uses visible light (colorful illumination) to mark the X-ray beam boundaries and central axis. This visual feedback system allows operators to see exactly where the beam will strike the patient's skin, enabling precise positioning even when the applicator is positioned at optimal treatment distances, thus resolving the trade-off between coverage area and positioning 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
This solution enables robust quality assurance and radiation safety control, improving treatment efficacy by providing precise dosimetry data and beam alignment, thus enhancing the accuracy and safety of skin cancer treatments.
Implementation Method 1
an X-ray tube for emitting an X-ray beam
Implementation Method 2
a light indicator for visualizing the X-ray beam
Data Source
Figure 1a~1b
Figure 1c
Figure 2
AI summary
The invention relates to a mobile X-ray unit comprising a base (2) for accommodating a control unit and a power supply further comprising an articulated displaceable arm (4a) supporting an X-ray applicator (4) having an X-ray tube for emitting an X-ray beam (8a) through an exit window (8) for irradiating an object, wherein the X-ray unit further comprises a phantom- based dosimetry system (9a, 9b, 9c) adapted to perform the on-line or real-time dosimetry check of the X-ray beam.