Magnetic Resonance Pulse Calculation During Partial Measurements
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Solution Overview
Problem
Existing magnetic resonance imaging (MRI) methods face long processing times due to time-consuming dynamic pulse calculations, especially for multiple partial measurements, and the use of universal pulses often results in suboptimal performance or failure to achieve desired target magnetization.
Innovation Solution
A computer-implemented method where pulse calculation for subsequent partial measurements is initiated during the performance of preceding measurements, allowing partial calculations to occur simultaneously with k-space sampling and image data acquisition, particularly for dynamic pulses like pTx pulses, optimizing the use of available time and reducing downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dynamic pulses are used for each partial measurement, then target magnetization and B1 field control are improved, but processing time increases significantly
Solution Approach 1:
The pulse calculation for the second partial measurement is initiated during the first partial measurement, performing preliminary actions in advance. This allows the excitation pulse to be pre-calculated and ready for the next measurement, eliminating idle waiting time and reducing overall processing duration while maintaining dynamic pulse quality for accurate target magnetization.
2Measurement precision
If pulse calculation is performed sequentially after each measurement, then calculation accuracy is maintained, but total measurement time increases
Solution Approach 1:
The system maintains continuous useful action by overlapping pulse calculation with measurement operations. Instead of sequential processing where calculation waits for measurement completion, the pulse calculation for the next measurement runs concurrently during the current measurement, ensuring both calculation accuracy and improved measurement throughput without idle time.
3Productivity
If universal pulses are used to bypass processing time, then measurement speed increases, but performance deteriorates
Solution Approach 1:
The system calculates dynamic pulses in advance during measurement operations, so that when the next measurement starts, the optimized excitation pulse is already ready. This approach maintains the performance benefits of dynamic pulses (accurate B1 field control and target magnetization) while achieving the speed advantage of pre-computed pulses, eliminating the need to choose between universal pulses and dynamic pulses.
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 approach significantly reduces overall measurement time by overlapping pulse calculation with existing measurements, ensuring precise B1 field control and improved target magnetization, even for complex applications like high-field MRI.
Implementation Method 1
imaging by magnetic resonance (MR), also referred to as magnetic resonance imaging (MRI)... Radio-frequency (RF) pulses, for example excitation pulses, for generating a RF field gradient... and gradient pulses for generating a magnetic field gradient are irradiated into an examination area... location-coded echo signals are triggered in the examination object
Data Source
AI summary
A method for performing a magnetic resonance measurement comprising multiple partial measurements, a magnetic resonance apparatus and a computer program product. According to the method, a first partial measurement is performed in a first period and a second partial measurement is performed after the first partial measurement. The second partial measurement involves the application of an excitation pulse for the excitation of a magnetic resonance signal. During the first period, at least part of a pulse calculation of the excitation pulse is performed.