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Introduction to Quantitative Susceptibility Mapping and Susceptibility Weighted Imaging
Pascal P R Ruetten1, Jonathan H Gillard1, Martin J Graves2
11Department of Radiology, School of Clinical Medicine, University of Cambridge, Cambridge, United Kingdom.
The British Journal of Radiology
|April 2, 2019
Summary
Quantitative Susceptibility Mapping (QSM) and Susceptibility Weighted Imaging (SWI) are MRI techniques measuring tissue magnetic susceptibility. This review details SWI and QSM methods and their clinical and research applications.
Area of Science:
- Medical Imaging
- Biophysics
- Magnetic Resonance Imaging
Background:
- Magnetic susceptibility differences in tissues are measurable with MRI.
- Susceptibility Weighted Imaging (SWI) utilizes these differences for contrast.
- Quantitative Susceptibility Mapping (QSM) offers advanced quantitative analysis.
Purpose of the Study:
- To review the methodologies of SWI and QSM.
- To describe the clinical and research applications of SWI and QSM.
- To explain the post-processing steps for QSM.
Main Methods:
- Detailed explanation of SWI image acquisition and contrast weighting.
- Description of QSM post-processing algorithms for quantitative mapping.
- Review of established and emerging applications in various medical fields.
Main Results:
- SWI provides contrast based on intrinsic tissue magnetic susceptibility.
- QSM generates quantitative maps of magnetic susceptibility with advanced processing.
- Both techniques have diverse applications in clinical diagnostics and research.
Conclusions:
- SWI and QSM are powerful MRI techniques for assessing tissue magnetic properties.
- Understanding their methodologies is crucial for effective clinical and research use.
- QSM represents a significant advancement in quantitative susceptibility analysis.
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