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Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
Published on: December 18, 2016
Artifact reduction of susceptibility-weighted imaging using a short-echo phase mask
1Department of Radiological Sciences, baraki Prefectural University of Health Sciences, Inashiki-gun, Ibaraki, Japan. ishimori@ipu.ac.jp
Acta Radiologica (Stockholm, Sweden : 1987)
|October 30, 2009
Summary
Susceptibility-weighted imaging (SWI) artifacts can be reduced by using a short-echo phase mask. This method improves deep vein visibility without compromising image quality in MR venography.
Area of Science:
- Medical Imaging
- Magnetic Resonance Imaging
Background:
- Susceptibility-weighted imaging (SWI) is crucial for applications like MR venography.
- Phase-masking processes in SWI can introduce artifacts.
Purpose of the Study:
- To highlight the risks associated with filter processes in SWI phase mask creation.
- To introduce a straightforward method for mitigating these artifacts.
Main Methods:
- Evaluated phase linearity concerning echo time (TE) in a phantom study.
- Assessed filter size and background homogeneity effects.
- Applied a short-TE phase mask in human studies, utilizing a dual-echo technique.
Main Results:
- High-pass filtering disrupted TE-phase linearity and introduced negative phase artifacts.
- A short-TE phase mask effectively reduced phase-aliasing artifacts.
- Deep vein visibility was maintained, comparable to conventional SWI methods.
Conclusions:
- Employing a short-echo phase mask is an effective strategy for reducing SWI artifacts.
- This technique enhances the diagnostic utility of SWI in clinical applications.
