Examination Table Calibration Using Distance and Plane Data
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Solution Overview
Problem
Existing medical image capturing systems, such as MRI apparatuses, face challenges in accurately positioning sensors due to interference from equipment like fluorescent lamps and fire alarms, which complicates the installation of cameras and affects the calibration of examination tables, leading to inaccuracies in capturing medical images.
Innovation Solution
A calibration data generation device and method that uses sensors to acquire distance and plane information from multiple positions on an examination table, generating calibration data to correct movement parameters based on the sensor's installation position, ensuring accurate alignment and positioning of the examination table.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a sensor is installed at a designated position on the ceiling, then the examinee can be detected accurately, but equipment interference (fluorescent lamps, fire alarms, ejector frames) prevents installation at the designated position
Solution Approach 1:
The patent introduces calibration data as an intermediary element that mediates between the sensor's actual installation position and the designated position. By acquiring distance information and plane information from the actual position and generating calibration data, the system enables the sensor to function as if it were at the designated position, thus resolving the conflict between installation feasibility and detection accuracy.
Solution Approach 2:
The patent changes the parameters of the detection system by introducing calibration parameters (calibration data) that adjust for the deviation between the actual sensor position and the designated position. This allows the system to maintain detection accuracy despite the sensor being installed at a different position due to equipment interference.
2Measurement precision
If calibration data is generated based on actual sensor installation position, then movement parameters of the examination table can be corrected accurately, but the system complexity increases due to additional calibration procedures
Solution Approach 1:
The system performs self-calibration by automatically acquiring distance information and plane information from the actual sensor position and generating calibration data without requiring manual intervention or complex external calibration equipment. This reduces the overall system complexity while maintaining high measurement precision.
Solution Approach 2:
The patent replaces complex mechanical calibration procedures with computational methods. Instead of physically adjusting the sensor position or using mechanical alignment tools, the system uses distance information and plane information acquired by the sensor to computationally generate calibration data, simplifying the calibration process.
Data Source
AI summary
There are provided a calibration data generation device, a calibration data generation method, a program, and a medical image capturing apparatus with which correction of a control parameter of an examination table according to a position where a sensor is installed is achieved. A calibration data generation device acquires first distance information from a sensor attached to a measurement room to a tabletop at a first up-down position, acquires first plane information at the first up-down position, acquires second distance information from the sensor to the tabletop at a second up-down position, acquires second plane information at the second up-down position, and generates calibration data for correcting a movement parameter of the tabletop by using the first distance information, the first plane information, the second distance information, and the second plane information.