Imposing spatio-temporal support in magnetic resonance angiographic imaging

Philip J. Bones; Bahareh Vafadar; Richard Watts; Bing Wu

doi:10.1117/12.861059

27 August 2010 Imposing spatio-temporal support in magnetic resonance angiographic imaging

Philip J. Bones, Bahareh Vafadar, Richard Watts, Bing Wu

Proceedings Volume 7800, Image Reconstruction from Incomplete Data VI; 780007 (2010) https://doi.org/10.1117/12.861059
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

A method to improve time resolution in 3D contrast-enhanced magnetic resonance angiography (CE-MRA) is proposed. A temporal basis based on prior knowledge of the contrast flow dynamics is applied to a sequence of image reconstructions. In CE-MRA a contrast agent (gadolinium) is injected into a peripheral vein and MR data is acquired as the agent arrives in the arteries and then the veins of the region of clinical interest. The acquisition extends over several minutes. Information is effectively measured in 3D k-space (spatial frequency space) one line at-atime. That line may be along a Cartesian grid line in k-space, a radial line or a spiral trajectory. A complete acquisition comprises many such lines but in order to improve temporal resolution, reconstructions are made from only partial sets of k-space data. By imposing a basis for the temporal changes, based on prior expectation of the smoothness of the changes in contrast concentration with time, it is demonstrated that a significant reduction in artifacts caused by the under-sampling of k-space can be achieved. The basis is formed from a set of gamma variate functions. Results are presented for a simulated set of 2D spiral-sampled CE-MRA data.

Citation Download Citation

Philip J. Bones, Bahareh Vafadar, Richard Watts, and Bing Wu "Imposing spatio-temporal support in magnetic resonance angiographic imaging", Proc. SPIE 7800, Image Reconstruction from Incomplete Data VI, 780007 (27 August 2010); https://doi.org/10.1117/12.861059

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available