What does susceptibility on MRI mean?

Susceptibility weighted imaging (SWI) is an MRI sequence that is particularly sensitive to compounds which distort the local magnetic field and as such make it useful in detecting blood products, calcium, etc.

What is SWI MRI used for?

SWI is most commonly used to detect small amounts of hemorrhage or calcium. Clinical applications are under research in different fields of medicine.

What is T1 weighted image good for?

Clinically, T1-weighted images generally are better for depicting normal anatomy and can accentuate pathology when gadolinium contrast is provided (Damadian 1971; Bitar et al. 2006). For example, fat demonstrates high signal intensity on T1-weighted images, while fluid demonstrates low signal intensity (Bitar et al.

What does T1 and T2 weighted images mean?

The most common MRI sequences are T1-weighted and T2-weighted scans. T1-weighted images are produced by using short TE and TR times. The contrast and brightness of the image are predominately determined by T1 properties of tissue. Conversely, T2-weighted images are produced by using longer TE and TR times.

What causes susceptibility artifact on MRI?

The most likely source of the artifact is microscopic metal fragments from the burr, suction tip or other surgical instruments, but other possible causes include hemorrhage or paramagnetic suture material. These artifacts may cause difficulty in interpretation or suggest a clinical problem.

Why is magnetic susceptibility important?

Quantitative measures of the magnetic susceptibility also provide insights into the structure of materials, providing insight into bonding and energy levels. Furthermore, it is widely used in geology for paleomagnetic studies and structural geology.

What is susceptibility artifacts on MRI?

Magnetic susceptibility artifacts (or just susceptibility artifacts) refer to a variety of MRI artifacts that share distortions or local signal change due to local magnetic field inhomogeneities from a variety of compounds.

How can you tell the difference between T1 and T2 MRI?

The best way to tell the two apart is to look at the grey-white matter. T1 sequences will have grey matter being darker than white matter. T2 weighted sequences, whether fluid attenuated or not, will have white matter being darker than grey matter.

What does susceptibility artifact mean?