Flow-related artifacts remain a significant concern for magnetic resonance (MR) angiography because their appearance in angiograms adversely impacts accuracy in evaluation of arterial stenoses. In this paper, a half-pulse excitation scheme for improved two-dimensional time-of-flight (2D TOF) angiogr
Body vascular MR angiography: Using 2D- and 3D-time-of-flight techniques
✍ Scribed by Shetty, Anil N. ;Bis, Kostaki G. ;Shirkhoda, Ali
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 834 KB
- Volume
- 12
- Category
- Article
- ISSN
- 1043-7347
No coin nor oath required. For personal study only.
✦ Synopsis
Magnetic resonance MR is a rapidly evolving field for imaging soft tissues and blood vessels, noninvasively. Currently, the field of magnetic resonance angiography ( ) MRA is the subject of widespread interest for the assessment of vascular disease. The need for such a noninvasive modality stems from the fact that certain patient populations are at a potential risk with conventional contrast angiography. While the acquisition of MR images greatly differs from that of x-ray angiography, the presentation of images is comparable to the conventional x-ray angiograms. The objective of this article is to describe the basic physical principles relevant to magnetic resonance angiography. In addition, the basic principles of various techniques and their clinical applications are presented in which the ( ) attention is given to the time-of-flight TOF technique. The optimization of different versions of TOF methods is described and the methods are compared with each other.
📜 SIMILAR VOLUMES
## Abstract ## Purpose To determine whether 3.0‐T elliptical‐centric contrast‐enhanced (CE) magnetic resonance (MR) angiography is superior to 3.0‐T elliptical‐centric time‐of‐flight (TOF) MR angiography in the detection and characterization of intracranial aneurysms, and to determine whether incr
## Abstract ## Purpose To investigate the feasibility of using time‐of‐flight (TOF) images as a constraint in the reconstruction of a series of highly undersampled time‐resolved contrast‐enhanced MR images (HYPR TOF), to allow simultaneously high temporal and spatial resolution and increased SNR.
## Abstract ## Purpose To demonstrate the effects of inherent RF inhomogeneity on ramped RF excitation at 3.0T, and to introduce a simple correction for improving visualization of distal intracranial arteries in three‐dimensional time‐of‐flight MR angiography (3D‐TOF‐MRA). ## Materials and Method
## Abstract ## Purpose: To compare nongated three‐dimensional (3D) contrast‐enhanced magnetic resonance angiography (CE‐MRA) with 3D‐navigated cardiac‐gated steady‐state free‐precession bright blood (3D‐nav SSFP) and noncontrast 2D techniques for ascending aorta dimension measurements. ## Materia