View-sharing in keyhole imaging: Partially compressed central k-space acquisition in time-resolved MRA at 3.0 T.
| Title: | View-sharing in keyhole imaging: Partially compressed central k-space acquisition in time-resolved MRA at 3.0 T. |
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| Authors: | Hadizadeh DR; University of Bonn, Department of Radiology, Sigmund-Freud-Straße 25, 53127 Bonn, Germany. Dariusch.Hadizadeh@ukb.uni-bonn.de; Gieseke J; Beck G; Geerts L; Kukuk GM; Boström A; Urbach H; Schild HH; Willinek WA |
| Source: | European journal of radiology [Eur J Radiol] 2011 Nov; Vol. 80 (2), pp. 400-6. Date of Electronic Publication: 2010 May 05. |
| Publication Type: | Journal Article |
| Language: | English |
| Journal Info: | Publisher: Elsevier Science Ireland Ltd Country of Publication: Ireland NLM ID: 8106411 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1872-7727 (Electronic) Linking ISSN: 0720048X NLM ISO Abbreviation: Eur J Radiol Subsets: MEDLINE |
| Imprint Name(s): | Publication: Limerick : Elsevier Science Ireland Ltd; Original Publication: Stuttgart ; New York : Thieme, [c1981- |
| MeSH Terms: | Image Enhancement/*methods ; Intracranial Arteriovenous Malformations/*diagnosis ; Magnetic Resonance Angiography/*methods; Intracranial Arteriovenous Malformations/pathology ; Adult ; Aged ; Angiography, Digital Subtraction ; Artifacts ; Case-Control Studies ; Contrast Media ; Data Compression ; Female ; Fourier Analysis ; Humans ; Male ; Middle Aged |
| Abstract: | Introduction: Time-resolved contrast-enhanced magnetic resonance (MR) angiography (CEMRA) of the intracranial vasculature has proved its clinical value for the evaluation of cerebral vascular disease in cases where both flow hemodynamics and morphology are important. The purpose of this study was to evaluate a combination of view-sharing with keyhole imaging to increase spatial and temporal resolution of time-resolved CEMRA at 3.0 T.; Methods: Alternating view-sharing was combined with randomly segmented k-space ordering, keyhole imaging, partial Fourier and parallel imaging (4DkvsMRA). 4DkvsMRA was evaluated using varying compression factors (80-100) resulting in spatial resolutions ranging from (1.1×1.1×1.4) to (0.96×0.96×0.95) mm3 and temporal resolutions ranging from 586 ms/dynamic scan--288 ms/dynamic scan in three protocols in 10 healthy volunteers and seven patients (17 subjects). DSA correlation was available in four patients with cerebral arteriovenous malformations (cAVMs) and one patient with cerebral teleangiectasia.; Results: 4DkvsMRA was successfully performed in all subjects and showed clear depiction of arterial and venous phases with diagnostic image quality. At the maximum view-sharing compression factor (=100), a "flickering" artefact was observed.; Conclusion: View-sharing in keyhole imaging allows for increased spatial and temporal resolution in time-resolved MRA.; (Copyright © 2010 Elsevier Ireland Ltd. All rights reserved.) |
| Substance Nomenclature: | 0 (Contrast Media) |
| Entry Date(s): | Date Created: 20100508 Date Completed: 20120518 Latest Revision: 20151119 |
| Update Code: | 20260130 |
| DOI: | 10.1016/j.ejrad.2010.04.020 |
| PMID: | 20447790 |
| Database: | MEDLINE |
Journal Article