Journal article
Combined time-resolved and high-spatial-resolution 3D MRA using an extended adaptive acquisition
Journal of magnetic resonance imaging, Vol.15(3), pp.291-301
03/2002
DOI: 10.1002/jmri.10071
PMID: 11891974
Abstract
Purpose: To combine the benefits of time-resolved dynamic imaging and single elliptical centric acquisitions in a reasonable scan time. Materials and Methods: A time series of images with moderate spatial resolution was acquired using the 3D Time-Resolved Imaging of Contrast Kinetics (3D TRICKS) technique with elliptical centric encoding during contrast arrival. Following venous opacification, a complete large centrically encoded k-space volume was acquired. The high-spatial-frequency portions of this volume were combined with a 3D TRICKS time frame to form a high-resolution image. An additional single image is formed by suppressing background and signal averaging all acquired data, including post-venous low-spatial-frequency data. For this image, 2D temporal correlation analysis is used to suppress low-spatial-frequency vein contributions. Arrival time and spatial correlations are used to suppress background. Results: The 3D TRICKS time frame may be selected to ensure a combined high-resolution image that has optimal central k-space sampling for any vascular region. The single image formed by signal averaging all acquired data has increased contrast-to-noise (CNR) and signal-to-noise (SNR) ratios. Conclusion: The advantages of time-resolved and high-spatial-resolution imaging were combined using an extended dual-phase acquisition. Some SNR and CNR gain was achieved by signal averaging. This process is facilitated by background and vein suppression. © 2002 Wiley-Liss, Inc.
Details
- Title: Subtitle
- Combined time-resolved and high-spatial-resolution 3D MRA using an extended adaptive acquisition
- Creators
- Yousef Mazaheri - Medical College of WisconsinTimothy J. Carroll - University of Wisconsin–MadisonJiang Du - University of Wisconsin–MadisonWalter F. Block - University of Wisconsin–MadisonSean B. Fain - University of Wisconsin–MadisonThomas F. Hany - University of Wisconsin–MadisonBeverly D.L. Aagaard - University of Wisconsin–MadisonCharles M. Strother - University of Wisconsin–MadisonCharles A. Mistretta - University of Wisconsin–MadisonThomas M. Grist - University of Wisconsin–Madison
- Resource Type
- Journal article
- Publication Details
- Journal of magnetic resonance imaging, Vol.15(3), pp.291-301
- Publisher
- Wiley Subscription Services, Inc., A Wiley Company
- DOI
- 10.1002/jmri.10071
- PMID
- 11891974
- ISSN
- 1053-1807
- eISSN
- 1522-2586
- Number of pages
- 11
- Language
- English
- Date published
- 03/2002
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Radiology; Electrical and Computer Engineering; Health and Human Physiology
- Record Identifier
- 9984275052702771
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