Radiation Detection Panel Conductive Layer Noise Reduction
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Solution Overview
Problem
Existing radiation detection apparatuses face challenges in reducing image noise caused by alternating current magnetic fields from high-power devices, particularly in hospital environments, where the frequency and amplitude of these fields can vary, leading to decreased imaging speed and ineffective noise reduction.
Innovation Solution
A radiation detection apparatus with a conductive layer and connecting members that form a closed circuit to induce currents, reducing image noise by canceling out or minimizing the impact of alternating current magnetic fields through strategic placement and impedance elements, allowing for stable noise reduction regardless of field frequency or amplitude.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conductive layer with connecting members is added to form a closed circuit, then image noise from alternating current magnetic fields is reduced, but device complexity increases
Solution Approach 1:
A conductive layer is introduced as an intermediary element between the radiation detecting panel and the housing. This conductive layer, when subjected to an alternating current magnetic field, generates induced currents that create a counteracting magnetic field, thereby reducing image noise without requiring direct modification of the detecting units or signal processing circuits
Solution Approach 2:
The invention converts the harmful alternating current magnetic field into a beneficial effect by utilizing electromagnetic induction. The magnetic field induces currents in the conductive layer, and these induced currents generate a counteracting magnetic field that reduces the noise impact on the radiation detection system
2Object-affected harmful factors
If subtraction processing is used to remove alternating current magnetic field influence, then image noise is reduced, but imaging speed decreases due to delayed image obtainment
Solution Approach 1:
The conductive layer is pre-configured and positioned to actively counteract alternating current magnetic fields in real-time during radiation detection. This preliminary physical preparation eliminates the need for post-processing subtraction operations, as the noise reduction occurs simultaneously with image acquisition
Solution Approach 2:
The invention replaces the computational subtraction processing method with a physical electromagnetic counteraction mechanism. Instead of digitally removing noise after image acquisition, the conductive layer physically counteracts the magnetic field interference during the detection process itself
3Object-affected harmful factors
If conductive members are arranged to reduce electromagnetic noise from radiation incidence direction, then noise reduction is achieved, but effectiveness against horizontal alternating current magnetic fields is insufficient
Solution Approach 1:
The conductive layer is arranged to extend in directions perpendicular to the radiation incidence direction, creating a three-dimensional electromagnetic shielding structure. This dimensional extension allows the conductive layer to effectively counteract alternating current magnetic fields from multiple directions, including horizontal directions, rather than only from the radiation incidence direction
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 solution effectively reduces image noise by up to 72% from both horizontal and vertical directions, maintaining imaging speed and efficiency even when the alternating current magnetic field characteristics are unknown or change during capture.
Implementation Method 1
a closed circuit in which an induced current caused by an alternating current magnetic field flows is formed by the first connecting member, the second connecting member, the driving signal line, the image signal line, and the conductive layer
Data Source
AI summary
A radiation detection apparatus comprises a planar radiation detecting panel in which a plurality of detecting units are arranged in a two-dimensional array; an output circuit that drives driving signal lines for driving the detecting units; a readout circuit that reads, via image signal lines, a signal from the detecting units; a conductive layer arranged close to the radiation detecting panel; a first connecting member that connects the ground of the readout circuit and the conductive layer; and a second connecting member that connects the conductive layer and wiring for providing a drive-off bias to the driving signal lines. The first connecting member is connected to the radiation detecting panel in a position between ¼ and ¾ of a length of a side of the radiation detecting panel to which the readout circuit is connected.