Mar 20, 2023 · Diffusion-weighted imaging (DWI) is a form of MR imaging based upon measuring the random Brownian motion of water molecules within a voxel of tissue. In general simplified terms, highly cellular tissues or those with cellular swelling exhibit lower diffusion coefficients.

Nov 1, 2010 · In addition to thermal noise, several artifacts can adversely affect the accuracy and precision of diffusion MRI measures. This chapter identifies the most relevant sources of artifacts in typical echo-planar diffusion MRI scans in a clinical setting.

Nov 23, 2012 · We examine the clinical impetus for whole-body diffusion-weighted MRI and discuss how to implement the technique with clinical MRI systems. We include practical tips and tricks to optimize image quality and reduce artifacts. The interpretative pitfalls are enumerated, and potential challenges are highlighted.

Jan 1, 2011 · In this chapter, a very detailed overview of the acquisition parameters of the DWI sequence is presented. Image quality issues like signal to noise ratio and image artifacts are exposed from different points of view, focusing on the most adequate acquisition strategies to improve DWI exams.

The DWI sequences were (i) visually rated and (ii) volumetrically analyzed. Results In 28 of 43 patients, we found severe and diagnostically relevant artifacts in EPI DWI, but none in STEAM...

Modern implementations of DWI retain the basic features of Stejskal's and Tanner's original PGSE technique with certain modifications. To suppress chemical shift artifacts, all commercial DWI sequences utilize some sort of fat suppression method.

In this article we review those artifacts and pitfalls on a qualitative basis, and introduce possible strategies that have been developed to mitigate or overcome them.

DWI is a powerful imaging method used to visualize the random motion of water molecules in tissues, offering insights into their microstructure. The RESOLVE technique further refines this method to offer clearer images, especially in anatomical regions that are prone to artifacts.

Jun 6, 2019 · Some hyperdense tumors, brain abscesses, and in rare cases, the edges of demyelinating lesions, can have diffusion restriction. In addition, there are common artifacts on DWI, especially at the temporal poles, were aberrant signal is often present – see below for an example. MRI DWI sequence. Typical areas of temporal DWI artifact, green arrows.

Oct 5, 2011 · The focus of this course is to introduce the types of artifacts that are seen in spin-echo diffusion-weighted echo planar imaging (SEEP -DWI) in the body, in particular, 3.0 T SS-EP-DWI.