Noncontrast enhanced four‐dimensional dynamic MRA with golden angle radial acquisition and k‐space weighted image contrast (KWIC) reconstruction. Issue 6 (12th December 2013)

• Record Type: Journal Article
• Authors: Song, Hee Kwon; Yan, Lirong; Smith, Robert X.; Xue, Yiqun; Rapacchi, Stanislas; Srinivasan, Subashini; Ennis, Daniel B.; Hu, Peng; Pouratian, Nader; Wang, Danny J.J.
• Is Part Of: Magnetic resonance in medicine. Volume 72:Issue 6(2014:Dec.)
• Page Start: 1541
• Page End: 1551
• Publication Date: 2013-12-12
• Subjects: Nuclear magnetic resonance -- Periodicals; Electron paramagnetic resonance -- Periodicals; 616.07548
• DOI: 10.1002/mrm.25057
• Languages: English
• ISSNs: 0740-3194

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="mrm25057-sec-0001" sec-type="section"> <title>Purpose</title> <p>To explore the feasibility of 2D and 3D golden‐angle radial acquisition strategies in conjunction with k‐space weighted image contrast (KWIC) temporal filtering to achieve noncontrast enhanced dynamic MRA (dMRA) with high spatial resolution, low streaking artifacts and high temporal fidelity.</p> </sec> <sec id="mrm25057-sec-0002" sec-type="section"> <title>Methods</title> <p>Simulations and in vivo examinations in eight normal volunteers and an arteriovenous malformation patient were carried out. Both 2D and 3D golden angle radial sequences, preceded by spin tagging, were used for dMRA of the brain. The radial dMRA data were temporally filtered using the KWIC strategy and compared with matched standard Cartesian techniques.</p> </sec> <sec id="mrm25057-sec-0003" sec-type="section"> <title>Results</title> <p>The 2D and 3D dynamic MRA image series acquired with the proposed radial techniques demonstrated excellent image quality without discernible temporal blurring compared with standard Cartesian based approaches. The image quality of radial dMRA was equivalent to or higher than that of Cartesian dMRA by visual inspection. A reduction factor of up to 10 and 3 in scan time was achieved for 2D and 3D radial dMRA compared with the Cartesian‐based counterparts.</p> </sec> <sec id="mrm25057-sec-0004" sec-type="section"> <title>Conclusion</title> <p>The proposed 2D and 3D radial dMRA techniques demonstrated image quality comparable or even superior to those obtained with standard Cartesian methods, but within a fraction of the scan time. Magn Reson Med 72:1541–1551, 2014. © 2013 Wiley Periodicals, Inc.</p> </sec> </abstract>