X-ray Detector Wire Routing and Electrode Layout
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current X-ray detection devices for CT dose profile measurements suffer from incomplete primary radiation measurement due to beam collimation, high cost, time-consuming methods, and asymmetrical response, which affects sensitivity and angular dependency.
Innovation Solution
The X-ray detection device features electric wires extending in the same direction to avoid the radiation field, an elongated design with parallel electrode contacts, an annular cavity for reduced angular dependency, and a tissue-equivalent PMMA dose adjusting element to maintain sensitivity and improve position determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wire is bent to extend in the reversed direction for ease of insertion, then the ease of operation is improved, but the wire positions itself in the radiation field causing measurement interference
Solution Approach 1:
The patent introduces a fourth dimension (longitudinal axis) for wire routing. Instead of bending the wire in the transverse plane (which places it in the radiation field), the wire is routed along the longitudinal axis of the detector housing, extending from the back contact through the housing structure. This dimensional change removes the wire from the radiation field while maintaining ease of connection.
Solution Approach 2:
The housing structure serves as an intermediary element that provides a dedicated wire routing path. The wire is channeled through the housing's longitudinal structure rather than being freely positioned in space, which mediates between the need for easy wire connection and the requirement to keep the wire out of the radiation field.
2Volume of moving object
If the electrode contacts are arranged on opposite sides of the detecting member, then the active detection volume is increased, but the response becomes asymmetrical affecting measurement accuracy
Solution Approach 1:
The patent deliberately introduces asymmetry in the housing structure (annular cavity positioned at one end, wire routing through the housing) to compensate for and correct the asymmetry in electrode contact arrangement. The asymmetrical housing features are designed to balance the overall detector response, allowing opposite-side electrode contacts while maintaining measurement accuracy.
3Ease of manufacture
If the detecting member is made flat with large electrode contacts, then the manufacturing is simplified, but the angular dependency increases reducing sensitivity consistency
Solution Approach 1:
The patent changes the geometric parameters of the detecting member, specifically making it elongated rather than flat, and positioning it edgewise in the radiation field. This parameter change reduces the angular dependency because the elongated shape presents a more consistent profile to incoming radiation from various angles, while the large electrode contacts remain on one face for easy manufacturing.
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 design enhances sensitivity consistency, reduces angular dependency from 5% to less than 1%, and facilitates easier device positioning, improving the accuracy and efficiency of CT dose profile measurements.
Implementation Method 1
a semiconducting detecting member (15) comprising a main body (28) made of lightly n-doped silicon
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention concerns an X-ray detection device (1 ), comprising: a semiconducting X-ray detecting member (15) provided with first and second electrode contacts (22, 24); first and second electric wires (16, 17) connected to the first and second electrode contacts (22, 24), respectively; a dose adjusting element (10, 10a, 10b) comprising tissue equivalent material, wherein the dose adjusting element (10, 10a, 10b) is arranged such as to surround the detecting member (15) with tissue equivalent material; and a shielding member (6) configured to provide an electric shield for the detecting member (15) and to protect the detecting member (15) from being exposed to light. The invention is characterized in that the first electrode contact (22) is positioned on the same side of the detecting member (15) as the second electrode contact (24).