Dynamic Measurement Start Time for Medical Imaging
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Solution Overview
Problem
Current methods for determining the measurement start time for medical imaging scans using contrast media are inefficient due to reliance on empirical values, leading to suboptimal contrast medium utilization and image quality, as they do not account for individual patient physiology and varying contrast medium concentration behaviors.
Innovation Solution
A method that detects concentration values of contrast media over time, determines an examination-specific enhancement model curve, and uses this curve to optimize the measurement start time for imaging measurements, ensuring peak contrast medium enhancement during the scan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If empirical values and fixed time offsets are used to determine measurement start time, then the method is simple to implement, but the contrast medium utilization is suboptimal and image quality is reduced
Solution Approach 1:
The system continuously monitors contrast medium concentration in the monitored region and uses this feedback to dynamically determine the measurement start time. The control device receives concentration values over time and automatically triggers the imaging measurement when the enhancement model curve indicates optimal contrast enhancement, eliminating the need for fixed time offsets and empirical estimates.
Solution Approach 2:
The system uses the patient's own contrast medium concentration behavior to determine the optimal measurement timing. By monitoring the actual contrast medium progression in the patient's bloodstream and using this self-generated data to trigger the scan, the system adapts to individual physiological variations without requiring external intervention or manual timing adjustments.
2Ease of operation
If fixed time offsets are used for measurement start time, then the procedure is standardized and easy to operate, but individual patient physiology variations are not accounted for
Solution Approach 1:
The measurement start time is dynamically adjusted based on real-time contrast medium concentration monitoring. Instead of using a fixed time offset, the system continuously updates the expected enhancement profile based on actual measured concentration values and triggers the measurement when the dynamic enhancement model indicates peak contrast enhancement for that specific patient.
Solution Approach 2:
The system changes the timing parameter (measurement start time) based on observed contrast medium concentration behavior. By monitoring actual concentration values and comparing them against the enhancement model, the system automatically adjusts the trigger time to match individual patient physiology, transforming a static parameter into a dynamically optimized value.
3Productivity
If conventional bolus tracking with fixed scan time offset is used, then the workflow is straightforward, but the amount of contrast medium required is increased to ensure sufficient enhancement
Solution Approach 1:
The system replaces the mechanical approach of administering excessive contrast medium to ensure sufficient enhancement with an intelligent control system. By using the enhancement model curve and real-time concentration monitoring, the system precisely determines when peak enhancement occurs, allowing for optimized contrast medium dosage and reducing waste while maintaining image quality.
4Device complexity
If measurement start time is determined without real-time concentration monitoring, then the system complexity is reduced, but the measurement may not coincide with peak contrast enhancement
Solution Approach 1:
The system performs preliminary monitoring of contrast medium concentration before the actual imaging measurement. By continuously measuring concentration values in the monitored region and building the enhancement model curve in advance, the system prepares the optimal trigger condition, ensuring that the subsequent measurement occurs at the precise moment of peak contrast enhancement.
Data Source
AI summary
A method is disclosed for determining a measurement start time for an imaging measurement via a medical imaging system depending on a course of concentration values of a contrast medium in a monitored region of an examination object over time. The method includes detecting the concentration values of the current concentration of the contrast medium in the monitored region at different successive detection times; determining a current examination-specific accumulation model curve on the basis of a course of the concentration values over time; and determining the measurement start time on the basis of the examination-specific accumulation model curve. A method for controlling a medical imaging system, a control device and a medical imaging system for implementing the method are further disclosed.