X-Ray Beam Position Compensation for Thermal Focal Spot Shift
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Solution Overview
Problem
X-ray facilities face issues with thermal effects causing shifts in the x-ray field, leading to unwanted radiation exposure and incomplete imaging due to changes in the focal spot position, particularly in mammography applications.
Innovation Solution
A control facility determines discrepancy information from temperature conditions in the x-ray emitter arrangement and adjusts the beam-forming facility to compensate for these shifts, using temperature sensors and discrepancy models to ensure accurate positioning and minimize unwanted radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the x-ray emitter operates continuously to maintain imaging capability, then the x-ray field position shifts due to thermal effects, but continuous operation is necessary for clinical efficiency
Solution Approach 1:
The system continuously monitors temperature conditions in the x-ray emitter arrangement and uses this feedback to dynamically adjust the beam-forming facility, compensating for thermal shifts in real-time during continuous operation
Solution Approach 2:
The system changes operational parameters by adjusting the beam-forming facility settings based on temperature conditions, allowing the x-ray field position to be compensated dynamically without interrupting the imaging process
2Reliability
If safety margins are increased to ensure complete breast imaging despite thermal shifts, then the entire breast is captured, but unnecessary radiation exposure increases
Solution Approach 1:
The system uses real-time temperature monitoring and dynamic compensation to maintain accurate x-ray field positioning, allowing safety margins to be minimized while ensuring complete breast imaging without excessive radiation exposure
Solution Approach 2:
The system performs preliminary temperature assessment and compensatory adjustment before each exposure, ensuring the x-ray field is precisely positioned to cover the entire breast without requiring excessive safety margins that would increase radiation exposure
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 method ensures precise x-ray field positioning, reducing unnecessary radiation exposure and ensuring complete imaging by compensating for thermal-induced shifts, particularly relevant in mammography.
Implementation Method 1
A control facility determines discrepancy information from temperature conditions in the x-ray emitter arrangement
Implementation Method 2
During operation of the x-ray emitter via corresponding electrical power, the x-ray emitter heats up. This in its turn can lead to the rotary anode with the focal path shifting in relation to the x-ray facility as a whole, so that a shift in the focal spot
Data Source
AI summary
One or more example embodiments relates to a method for operating an x-ray facility, having an x-ray emitter arrangement with an x-ray emitter for sending out an x-ray field for examination of an examination object and an x-ray detector for receipt of x-ray radiation of the x-ray field, wherein the x-ray emitter arrangement has a mono tank for the x-ray emitter with a housing in which a radiation exit window for the x-ray radiation generated by the x-ray emitter is arranged, and a beam-forming facility for setting a desired extent and position of the x-ray field.