X-ray tube anode rotation control for resonance noise suppression
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Solution Overview
Problem
X-ray diagnostic apparatuses with rotating anode type X-ray tubes face challenges in reducing noise caused by resonance between the anode rotation frequency and the supporter's attitude, which varies during use, making it difficult to suppress noise effectively.
Innovation Solution
The apparatus includes a processing circuitry that acquires the supporter's attitude and controls the driver to adjust the rotation frequency and voltage waveform of the X-ray tube, storing data on optimal parameters to prevent resonance noise by associating C-arm angles with anode rotation control data, operation sound data, and noise determination in a database.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the rotation frequency of the anode is increased to achieve larger X-ray output, then the X-ray output is improved, but resonance noise is generated when the rotation frequency matches the resonance frequency of the container or supporter
Solution Approach 1:
The system dynamically adjusts the anode rotation frequency based on the detected supporter attitude. The control circuitry continuously monitors the supporter's angle and modifies the rotation frequency in real-time to avoid resonance conditions, transforming the static rotation frequency into a dynamic parameter that adapts to changing geometric conditions.
Solution Approach 2:
The invention changes the rotation frequency parameter of the anode based on the supporter's attitude. By storing multiple rotation frequency values corresponding to different attitude ranges and selecting the appropriate frequency based on current attitude measurements, the system optimizes both X-ray output and noise suppression through parameter variation.
2Object-generated harmful factors
If the anode rotation frequency is reduced to avoid resonance noise, then noise is suppressed, but the X-ray output decreases
Solution Approach 1:
The system dynamically adjusts the anode rotation frequency based on the detected supporter attitude. The control circuitry continuously monitors the supporter's angle and modifies the rotation frequency in real-time to avoid resonance conditions, transforming the static rotation frequency into a dynamic parameter that adapts to changing geometric conditions.
Solution Approach 2:
The invention changes the rotation frequency parameter of the anode based on the supporter's attitude. By storing multiple rotation frequency values corresponding to different attitude ranges and selecting the appropriate frequency based on current attitude measurements, the system optimizes both X-ray output and noise suppression through parameter variation.
3Device complexity
If a fixed anode rotation frequency is used to simplify control, then device complexity is reduced, but noise occurs when the rotation frequency matches the resonance frequency of the supporter at various attitudes
Solution Approach 1:
The system performs preliminary action by pre-storing multiple rotation frequency values in the control circuitry that correspond to different supporter attitude ranges. Before actual operation, the system loads these pre-calculated frequency values, so that when the apparatus is in use, it can quickly select the appropriate frequency without complex real-time calculations, thus maintaining simple control while avoiding resonance noise.
Solution Approach 2:
The control circuitry continuously detects the supporter's attitude and uses this feedback information to select the appropriate pre-stored rotation frequency value. This closed-loop feedback mechanism ensures that the anode rotation frequency always matches the current geometric configuration, preventing resonance noise while maintaining simple control logic.
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 effectively reduces noise by controlling the X-ray tube's parameters based on the supporter's attitude, preventing resonance and minimizing noise generation during examinations, thereby reducing operator stress and patient discomfort.
Implementation Method 1
A rotating anode type X-ray tube disperses an impact of thermoelectrons over a wide range of a target provided on an anode by rotation of the anode
Implementation Method 2
a rotating anode type X-ray tube may produce noise as a result of resonance in a container that contains the X-ray tube if the rotation frequency of the anode and the resonance frequency of the container match
Data Source
AI summary
According to one embodiment, an X-ray diagnostic apparatus includes an X-ray tube, a driver, a supporter, and processing circuitry. The X-ray tube including a rotating anode. The driver rotates the rotating anode. The supporter supports the X-ray tube in an inclinable manner. The processing circuitry acquires information indicating an attitude of the supporter and controls the driver based on information indicating the acquired attitude.