Work

Improved venous suppression and spatial resolution with SENSE in elliptical centric 3D contrast‐enhanced MR angiography

Year: 2004

Type: article

Abstract: The elliptical centric (EC) view order samples a 3DFT acquisition from the center of k-space outward, and when applied to contrast-enhanced MR angiography (CE-MRA) provides intrinsic venous suppression. This is because the veins enhance several seconds after the scan is initiated, and are thus encoded solely by noncentral k-space frequencies. A separate method, sensitivity encoding (SENSE), accelerates the k-space sampling rate by reducing the phase FOV or, equivalently, by increasing the k-space sampling interval, and has been used to increase spatiotemporal resolution. We hypothesized that by combining SENSE with EC, sampling of central k-space would be accelerated and the k-space radius at which the veins first showed contrast enhancement would be increased over a reference scan, thus providing improved venous suppression and spatial resolution without additional scan time. This hypothesis was studied with the use of phantom and carotid CE-MRA experiments, and the results demonstrated an approximate 25% reduction in venous signal when SENSE was used.

Source: Magnetic Resonance in Medicine

DOI: 10.1002/mrm.20216

Authors: Houchun H. Hu, Ananth J. Madhuranthakam, David G. Kruger, John Huston, Stephen J. Riederer

Institution: Mayo Clinic

Language: English

Topic: Advanced MRI Techniques and Applications

Subfield: Radiology, Nuclear Medicine and Imaging

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: bronze

Funders: National Heart, Lung, and Blood Institute, National Institute of Biomedical Imaging and Bioengineering