Susceptibility Weighted Imaging (SWI) is an advanced MRI (Magnetic Resonance Imaging) technique that exploits the magnetic susceptibility differences between various tissue types and blood oxygen levels to provide detailed visualization of venous structures, microbleeds, and other vascular abnormalities.

Susceptibility-weighted images (SWI) are generated from gradient-echo (GRE) pulse sequences. GRE sequences are sensitive to differences in tissue susceptibility because they lack the ability to refocus spins dephased by magnetic field inhomogeneities.

Susceptibility weighted imaging (SWI) is an magnetic resonance imaging (MRI) technique that exploits the magnetic susceptibility differences of various compounds, such as blood, iron, and diamagnetic calcium, thus enabling new sources of MR contrast [1 - 3].

Susceptibility weighted imaging (SWI), originally called BOLD venographic imaging, is an MRI sequence that is exquisitely sensitive to venous blood, hemorrhage and iron storage. SWI uses a fully flow compensated, long echo, gradient recalled echo (GRE) pulse sequence to …

Oct 6, 2024 · 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 ...

Feb 23, 2021 · Susceptibility-weighted imaging (SWI) evolved from simple two-dimensional T2*-weighted sequences to three-dimensional sequences with improved spatial resolution and enhanced susceptibility contrast. SWI is an MRI sequence sensitive to compounds that distort the local magnetic field (eg, calcium and iron), in which the phase information can ...

Jun 27, 2024 · SWI is a specialized MRI technique that exploits the magnetic susceptibility differences between tissues. Unlike traditional MRI, which primarily uses water content differences to generate images, SWI focuses on detecting variations in the magnetic properties of tissues, such as blood, iron, and calcium deposits.

SUMMARY: Susceptibility-weighted imaging (SWI) is a new neuroimaging technique, which uses tissue magnetic susceptibility differences to generate a unique contrast, different from that of spin density, T1, T2, and T2*. In this review (the first of 2 parts), we present the technical background for …

Among the various MR sequences, susceptibility-weighted imaging (SWI) is a high-spatial-resolution, three-dimensional gradient-echo MR sequence, which is very sensitive in detecting deoxyhemoglobin, ferritin, hemosiderin, and bone minerals through local magnetic field distortion.

SUMMARY: Susceptibility-weighted imaging (SWI) is a new neuroimaging technique, which uses tissue magnetic susceptibility differences to generate a unique contrast, different from that of spin density, T1, T2, and T2*.