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https://hdl.handle.net/20.500.14279/1669
Τίτλος: | Extension of rapid phase-contrast magnetic resonance imaging using BRISK in multidirectional flow | Συγγραφείς: | Hershey, Bradley L. Doyle, Mark W. Anayiotos, Andreas |
metadata.dc.contributor.other: | Αναγιωτός, Ανδρέας | Major Field of Science: | Engineering and Technology | Field Category: | ENGINEERING AND TECHNOLOGY | Λέξεις-κλειδιά: | Hemodynamics;Cardiovascular system;Computer simulation;Magnetic resonance imaging | Ημερομηνία Έκδοσης: | Ιου-2005 | Πηγή: | Annals of Biomedical Engineering, 2005, vol. 33, no. 7, pp. 929-936 | Volume: | 33 | Issue: | 7 | Start page: | 929 | End page: | 936 | Περιοδικό: | Annals of Biomedical Engineering | Περίληψη: | We developed BRISK-CON-VPS, a rapid phase-contrast cine approach that is a hybrid of the BRISK-VPS (Block Regional Interpolation Scheme for k-space) and conventional (CONV-VPS) scanning employing k-space views per segment (VPS). BRISK-CON-VPS allows data acquisition approximately four times faster than CONV-VPS imaging and has the advantage compared to BRISK-VPS that it can potentially be incorporated into real-time applications. In BRISK-CON-VPS contiguous regions of k-space are sampled using a views per segment factor that is varied as a function of distance from the k-space center. Computational fluid dynamics (CFD) data were used to simulate CONV-VPS, BRISK-VPS, and BRISK-CON-VPS. BRISK-CON-VPS was simulated by incrementing the VPS progressively with increasing distance from the k-space origin while BRISK-VPS was simulated using a uniform VPS applied to the sparse sampling scheme. Simulations showed that up to a base VPS of 5, both BRISK-CON-VPS and BRISK-VPS retained excellent axial-velocity accuracy. Secondary in-plane velocity flow fields were well represented with BRISK-CON-VPS and BRISK-VPS up to a base VPS of 3. CONV-VPS, BRISK-CON-VPS, and BRISK-VPS were applied in vivo and shown to provide comparable quantitative flow data. BRISK-CON-VPS accomplishes breath-hold acquisitions as efficiently as BRISK-VPS, but without requiring data interpolation or under-sampling k-space. | URI: | https://hdl.handle.net/20.500.14279/1669 | ISSN: | 00906964 | DOI: | 10.1007/s10439-005-3681-y | Rights: | © Springer | Type: | Article | Affiliation: | University of Alabama at Birmingham | Affiliation: | University of Alabama at Birmingham |
Εμφανίζεται στις συλλογές: | Άρθρα/Articles |
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