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Susceptibility weighted imaging (SWI) is a recently developed magnetic resonance imaging (MRI) technique that is increasingly being used to narrow the differential diagnosis of many neurologic disorders. It exploits the magnetic susceptibility ...
SWI MRI is an advanced MRI technique that exploits the magnetic susceptibility differences between tissues and blood to visualize venous structures, microbleeds, and other vascular abnormalities. Learn the physics, image appearance, and clinical applications of SWI MRI for various neurological conditions.
Physics. SWI is a 3D high-spatial-resolution fully velocity corrected gradient-echo MRI sequence 1-3.Unlike most other conventional sequences, SWI takes advantage of the effect on phase as well as magnitude 4.. Compounds that have paramagnetic, diamagnetic, and ferromagnetic properties all interact with the local magnetic field distorting it and thus altering the phase of local tissue which ...
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Learning Objectives: After reading the article and taking the test, the reader will be able to: Describe how technical parameters of susceptibility-weighted imaging (SWI) and SWI-like sequences impact image appearance and consequently image interpretation
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Magnetic Susceptibility: Different tissues and substances in the brain have unique magnetic susceptibilities. For instance, deoxygenated blood is more susceptible to magnetic fields than oxygenated blood. Phase Imaging: SWI captures phase images, which record the variations in the magnetic field caused by different tissues. These variations are subtle but can be amplified to create a clearer ...
SWI is a technique that uses gradient-echo sequences to detect and display differences in tissue susceptibility, such as iron, blood, and calcifications. Learn how SWI images are generated, processed, and used for clinical diagnosis, and compare different vendors' methods and applications.
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