MRI Laser Marking Unit Calibration for Positioning Error Correction
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Solution Overview
Problem
Existing magnetic resonance apparatuses face challenges in accurately positioning the laser marking unit, leading to potential errors that are difficult to detect and correct, resulting in costly and time-consuming troubleshooting processes.
Innovation Solution
Incorporation of a position-determining unit with a calibration unit that includes a reflector element, sensor element, and adjusting element to facilitate easy detection and correction of laser marking unit positioning errors, allowing medical operators to perform calibration measurements without the need for service technicians.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the laser marking unit is manually adjusted during calibration measurements, then positioning precision can be improved, but the complexity of operation and time consumption increase significantly
Solution Approach 1:
The calibration unit enables the laser marking unit to perform self-calibration through automated measurement and adjustment processes. The system automatically determines positioning errors and adjusts the laser marking unit without requiring manual intervention, thereby maintaining high positioning precision while reducing operational complexity and time consumption.
2Reliability
If the laser marking unit position is manually corrected by service technicians, then positioning errors can be corrected, but maintenance cost and time consumption increase
Solution Approach 1:
The calibration unit enables automatic detection and correction of positioning errors in the laser marking unit. The system continuously monitors positioning accuracy and performs self-correction without requiring service technician intervention, thereby maintaining high reliability while eliminating maintenance time losses.
Solution Approach 2:
The calibration unit implements a feedback mechanism that continuously monitors the positioning accuracy of the laser marking unit and automatically adjusts it when deviations are detected. This closed-loop control ensures positioning accuracy is maintained while preventing the accumulation of errors that would require manual intervention.
3Measurement precision
If precise adjustment of the laser marking unit is performed during quality assurance measurements, then measurement accuracy is improved, but the risk of positioning errors increases if readjustment occurs
Solution Approach 1:
The calibration unit implements continuous feedback monitoring of the laser marking unit position during quality assurance measurements. Any unintended readjustments are immediately detected and corrected, ensuring both measurement precision and position stability are maintained throughout the measurement process.
Solution Approach 2:
The calibration unit performs preliminary calibration and positioning verification before quality assurance measurements begin. This preliminary action establishes a known accurate reference state, ensuring subsequent measurements achieve high precision while reducing the risk of positioning errors during the measurement process.
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
Enables straightforward detection and correction of laser marking unit positioning errors, reducing the need for costly maintenance and enabling operators to perform regular calibrations, thereby improving the accuracy and efficiency of magnetic resonance examinations.
Implementation Method 1
the laser marking unit, which is arranged in a transition area between a front side of the scanner unit and the patient receiving area and which is embodied to mark a position of the region of interest
Implementation Method 2
a sensor element which is embodied to detect a position of the laser marking unit
Data Source
AI summary
A magnetic resonance apparatus is described that comprises a scanner unit, a patient receiving area at least partially surrounded by the scanner unit, a patient support device that has a movable patient table embodied to be inserted into the patient receiving area, and a position-determining unit embodied to determine a position of the patient table with respect to the scanner unit, and which comprises a laser marking unit. The position-determining unit comprises a calibration unit for calibrating the laser marking unit.