High-Voltage Apparatus Anode Rotation Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional radioscopic apparatuses require patients to be exposed to unnecessary radiation until the voltage reaches the level suitable for diagnosis, as the radiation intensity is weak until the voltage applied to the rotating anode reaches the diagnostic level, leading to inefficient use of radiation and increased patient exposure.
Innovation Solution
A high-voltage apparatus that applies a predetermined voltage only after the rotating anode reaches a sufficient number of rotations to prevent damage, ensuring immediate output of desired radiation intensity upon starting fluoroscopy, thereby eliminating the need for initial low-voltage exposure and reducing unnecessary radiation exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If voltage is applied to the rotating anode before it reaches sufficient rotation speed, then radiation emission can start immediately, but the rotating anode will be damaged due to excessive heating
Solution Approach 1:
The system performs preliminary rotation of the anode to a safe speed before applying voltage. The control unit monitors the rotation speed and only permits voltage application once the anode reaches a predetermined safe rotation speed, preventing damage while enabling subsequent radiation emission.
Solution Approach 2:
The system uses feedback control by continuously monitoring the rotation speed of the anode and using this information to control when voltage should be applied. The control unit receives feedback about rotation speed and automatically adjusts the voltage application timing to ensure safe operating conditions.
2Reliability
If voltage is applied only after rotating anode reaches sufficient rotations, then anode damage is prevented, but unnecessary radiation exposure occurs during the voltage application delay period
Solution Approach 1:
The system performs the preliminary action of rotating the anode to safe speed before voltage application, but does so in a controlled manner that minimizes unnecessary radiation. The control unit ensures voltage is applied as soon as safe rotation speed is achieved, eliminating unnecessary delay and associated radiation exposure.
Solution Approach 2:
The system dynamically changes the voltage parameter based on rotation speed. Instead of using a fixed voltage threshold, the control unit adjusts when voltage becomes active based on the real-time rotation speed parameter, optimizing both anode protection and radiation efficiency.
3Reliability
If minimum voltage is constantly applied during rotation acceleration, then anode damage is prevented, but radiation intensity remains too weak for diagnosis
Solution Approach 1:
The system separates the preliminary rotation phase from the voltage application phase. During rotation acceleration, no voltage is applied (or minimal voltage is applied only after safe speed is reached), allowing the anode to reach optimal rotation speed without the constraint of maintaining minimum diagnostic voltage, thus preventing damage while enabling future high-intensity radiation.
Solution Approach 2:
The system uses periodic or phased action by dividing the operation into distinct phases: a rotation acceleration phase without voltage application, followed by a voltage application phase once safe rotation speed is achieved. This phased approach allows optimal rotation speed to be reached before diagnostic radiation is generated.
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 allows for immediate acquisition of fluoroscopic images suitable for diagnosis without initial low-intensity radiation exposure, reducing patient radiation dosage and optimizing radiation use.
Implementation Method 1
A cathode 64 is installed in a position opposed to the edge of the rotating anode 61, from which electrons E are emitted to an edge region of the rotating anode 61
Implementation Method 2
The electrons E discharged from the cathode 64 impinge on the edge region of the rotating anode 61, from which an X-ray beam B is emitted outward of the vacuum chamber 62
Data Source
AI summary
In a high-voltage apparatus according to this invention, a predetermined voltage is applied to a rotating anode after waiting until the number of rotations increases to such an extent that the rotating anode is not damaged. That is, X-rays of desired intensity are already outputted from a point of time when the voltage is applied to the rotating anode. Therefore, diagnosis can be performed immediately after the voltage is applied to the rotating anode. That is, unlike the prior art, there is no need to wait until X-ray intensity becomes suitable for diagnosis after X-ray emission is started, and there is no need to irradiate the patient with unnecessary X-rays. Therefore, the patient can be inhibited from being irradiated with excessive X-rays (with an improvement made in a response from when the operator gives instructions for starting fluoroscopy until emission of X-rays suitable for diagnosis).