X-ray CT Cover Soundproofing via Sandwiched Acoustic Layer
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Solution Overview
Problem
Conventional X-ray CT systems do not adequately reduce noise leakage from the interior of the cover, which affects the quality of medical imaging and patient experience.
Innovation Solution
The X-ray CT system incorporates two sheet-like soundproof members that sandwich a soundproof layer, comprising a thin film-like material with high X-ray and laser transmittance, and an air layer to effectively reduce noise leakage through the X-ray transmission opening, enhancing acoustic insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single sheet member is used to close the X-ray transmission opening, then safety is ensured and X-ray transmittance is maintained, but noise reduction is insufficient
Solution Approach 1:
The single sheet member is divided into multiple soundproof members (first and second soundproof members) with a soundproof layer positioned between them. This segmentation allows each layer to contribute to noise reduction while maintaining X-ray transmittance, effectively addressing the insufficient noise reduction of a single sheet member without significantly increasing structural complexity.
Solution Approach 2:
The soundproof layer is constructed as a composite structure combining multiple materials: a porous core layer for sound absorption and outer wrapping layers for structural integrity. This composite material approach enables effective noise reduction while maintaining transparency to X-rays and laser beams, resolving the contradiction between noise reduction and structural simplicity.
2Object-affected harmful factors
If sound absorption material is applied as lining to reduce noise, then noise leakage is reduced, but X-ray transmittance and laser transmittance deteriorate
Solution Approach 1:
The soundproof members are designed with specific local properties: they are made of materials that are transparent to X-rays and laser beams in the regions where these beams pass through, while providing sound absorption in other regions. This local quality differentiation allows noise reduction without compromising image quality or laser marking functionality.
Solution Approach 2:
The core layer of the soundproof layer uses porous materials that effectively absorb sound waves while maintaining high transmittance to X-rays and laser beams. The porous structure provides sound absorption capability without significantly blocking electromagnetic radiation, thus reducing noise leakage while preserving image quality.
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 improves sound insulation, reducing noise leakage and maintaining image quality by using materials that absorb sound energy and minimize X-ray absorption, thus enhancing the overall performance of the X-ray CT system.
Implementation Method 1
two sheet-like soundproof members (61) and a soundproof layer (62)... which absorb sound energy
Implementation Method 2
a thin film-like material having a high transmittance for X-rays... that minimize X-ray absorption
Implementation Method 3
two sheet-like soundproof members configured to sandwich a soundproof layer... and an air layer to effectively reduce noise leakage
Data Source
AI summary
An X-ray CT system as the embodiment comprises an annular rotating body configured to accommodate an X-ray tube, the rotating body having a central opening, into which a bed can be inserted in the center thereof, a cover shaped in a tubular form and having a tubular case part, which, when fitted in the opening, shields the annular rotating body from a central side of the opening, the cover being provided with an X-ray transmission opening at the tubular case part, through which, X-rays from the X-ray tube are allowed to transmit, and two sheet-like soundproof members configured to sandwich a soundproof layer, the soundproof members being disposed to to close the X-ray transmission opening. According to the X-ray CT system, it is possible to reduce sufficiently the noise leaking from inside the cover.