Mr angiography series: Fundamentals of non–contrast-enhanced mr angiography

Abstract

Unlike CT angiography, which requires the use of contrast me-dium, MR angiography (MRA) can be performed without the use of contrast agents. This subfield of MRA is referred to as non– contrast-enhanced MRA (NC-MRA). While NC-MRA can be performed in many patients, it is especially useful in the imaging of pediatric and pregnant patients, as well as in patients with renal impairment. NC-MRA can also provide unique functional and hemodynamic information that is not obtainable with CT angiography or contrast-enhanced MRA. This module gives an overview of the predominant NC-MRA techniques that are currently avail-able on modern clinical MRI systems, while also discussing some new and emerging to..