MRI Apparatus Single Pulse Sequence Multi-Contrast Imaging
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Solution Overview
Problem
Conventional MRI techniques require multiple pulse sequences to obtain MR images with different contrasts, leading to prolonged scan times and potential discrepancies due to organ movement between image acquisitions.
Innovation Solution
A magnetic resonance imaging (MRI) apparatus and method that utilize a single pulse sequence to obtain multiple MR images with different contrasts by applying inversion RF pulses to multiple slices, allowing for simultaneous capture of T2* weighted, proton density, and inversion recovery images through a multi-band imaging approach.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple pulse sequences are applied to obtain MR images with different contrasts, then image contrast variety is improved, but scan time is prolonged
Solution Approach 1:
The patent combines multiple pulse sequences (T2*-weighted, PD-weighted, and inversion recovery sequences) into a single integrated pulse sequence. This allows acquisition of multiple contrast images during one scan cycle, thereby reducing scan time while maintaining the ability to obtain diverse image contrasts for different diagnostic needs
Solution Approach 2:
The invention creates a universal pulse sequence that performs multiple functions: it acquires T2*-weighted images, PD-weighted images, and inversion recovery images within a single sequence framework. This multi-functional approach eliminates the need for separate pulse sequences for each contrast type, directly addressing the time loss issue
2Adaptability or versatility
If multiple pulse sequences are applied to obtain MR images with different contrasts, then image contrast variety is improved, but organ movement discrepancies between images increase
Solution Approach 1:
By merging multiple contrast acquisitions into a single pulse sequence executed continuously, the patent minimizes the time gap between acquiring different contrast images of the same anatomical region. This reduces organ movement discrepancies and improves image registration accuracy compared to acquiring images at different time points with separate sequences
Solution Approach 2:
The invention maintains continuous scanning throughout the acquisition of all contrast images without interruption or repositioning between sequences. This continuous action ensures that all images are captured within a single breath-hold or scan session, minimizing physiological motion artifacts and improving reliability
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 scan time and maintains image quality by obtaining multiple contrast images efficiently, minimizing the impact of organ movement and reducing patient inconvenience.
Implementation Method 1
a first inversion radio frequency (RF) pulse is applied to a first slice of the object and a second inversion RF pulse is applied to a second slice of the object
Data Source
AI summary
Provided are a magnetic resonance imaging (MRI) apparatus and method for obtaining a plurality of MR images having different contrasts by using a single pulse sequence. The MRI apparatus includes a controller configured to control a pulse sequence of one cycle to be applied to a plurality of slices of an object, wherein the one cycle includes a first obtaining section during which a first inversion radio frequency (RF) pulse is applied to a first slice of the object and a second obtaining section during which a second inversion RF pulse is applied to a second slice of the object adjacent to the first slice, and to sequentially obtain a first MR signal for capturing a first MR image of the first slice, a second MR signal for capturing at least one second MR image of the second slice adjacent to the first slice, and a third MR signal for capturing at least one third MR image of the first slice, during the first obtaining section.