Radioactive Ray Detector Noise Reduction via Rigid PCB Interconnect
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Solution Overview
Problem
Existing X-ray CT systems face challenges with noise interference in signal transmission due to long flexible wiring, which affects the conversion of analog signals to digital signals, leading to lower image quality.
Innovation Solution
The radioactive ray detecting apparatus features a compact design with short physical distances between photodiodes and data acquisition systems, utilizing a first electrical connection unit with conductive adhesive and underfill, and a second electrical connection unit with a sheet connector, minimizing noise interference and enhancing signal conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If long flexible wiring is used to connect photodiodes to data acquisition systems, then the physical layout is more flexible and easier to manufacture, but noise interference increases and signal transmission quality deteriorates
Solution Approach 1:
The patent extracts the harmful function of long flexible wiring by replacing it with a rigid circuit board structure. The photodiodes and data acquisition systems are mounted directly on the circuit board, eliminating the need for long flexible connections and thus removing the noise interference problem while maintaining manufacturing feasibility through standardized PCB techniques.
Solution Approach 2:
The rigid circuit board serves as an intermediary structure that provides both mechanical support and electrical connection pathways. This intermediary eliminates the need for long flexible wiring by providing short, controlled trace routes on the board, thereby reducing noise interference while maintaining ease of manufacture through standard PCB fabrication processes.
2Adaptability or versatility
If long flexible wiring is used for signal transmission, then device flexibility is improved, but analog-to-digital signal conversion accuracy deteriorates due to noise
Solution Approach 1:
The patent removes the flexible wiring component that causes noise interference, thereby extracting the harmful aspect while retaining the essential function of signal transmission. The rigid circuit board provides stable, short connection paths that maintain signal integrity for accurate analog-to-digital conversion.
Solution Approach 2:
The patent replaces the mechanical flexible wiring system with an integrated circuit board system where electrical traces provide rigid, controlled pathways. This substitution eliminates the mechanical flexibility but gains electrical stability and noise immunity, ensuring high signal conversion accuracy.
3Temperature
If photodiodes are positioned far from data acquisition systems, then heat dissipation and signal isolation are improved, but connection length increases causing more noise interference
Solution Approach 1:
The patent uses the circuit board as a common platform that copies the function of both mechanical support and electrical connection. By mounting both photodiodes and data acquisition systems on the same rigid board, it achieves short connection lengths for noise immunity while the board's thermal management capabilities handle heat dissipation, eliminating the need for physical separation.
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 configuration significantly reduces noise impact on signal transmission, resulting in higher quality images by ensuring effective analog-to-digital signal conversion.
Implementation Method 1
a scintillator configured including a plurality of scintillators arranged in a two-dimensional array... each scintillator converts the incident dose of the X-ray beam to visible light
Implementation Method 2
a photodiode array mounted on a wiring board... this visible light is converted to an electrical signal by a photodiode array
Data Source
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AI summary
According to one embodiment, a radioactive ray detecting apparatus includes: a scintillator that produces visible light from a radioactive ray; a light detecting portion including a light receiving element that generates an electrical signal on a basis of intensity of visible light; a first board; a first electrical connection unit that electrically connects the light detecting portion and a first surface of the first board to each other; a second board disposed to face the first board; a second electrical connection that electrically connects a first surface of the second board and a second surface of the first board being opposite from the first surface of the first board to each other; and a data acquisition device that processes an electrical signal transmitted from the light detecting portion through the first electrical connection unit, the first board, the second electrical connection unit, and the second board.