Abstract
Contrast-enhanced magnetic resonance angiography (CE-MRA) was first introduced for clinical studies approximately 20 years ago. Early work provided 3-4 mm spatial resolution with acquisition times in the 30-second range. Since that time there has been continuing effort to provide improved spatial resolution with reduced acquisition time, allowing high resolution 3D time-resolved studies. The purpose of this work is to describe how this has been accomplished. Specific technical enablers have been: improved gradients allowing reduced repetition times, improved k-space sampling and reconstruction methods, parallel acquisition, particularly in two directions, and improved and higher count receiver coil arrays. These have collectively made high-resolution time-resolved studies readily available for many anatomic regions. Depending on the application, ∼1 mm isotropic resolution is now possible with frame times of several seconds. Clinical applications of time-resolved CE-MRA are briefly reviewed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3-22 |
| Number of pages | 20 |
| Journal | Journal of Magnetic Resonance Imaging |
| Volume | 42 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jul 1 2015 |
Keywords
- MRA
- contrast-enhanced MRA
- fast imaging
- parallel imaging
- time-resolved studies
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging