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Verfasst von:Hilgenfeld, Tim [VerfasserIn]   i
 Prager, Marcel [VerfasserIn]   i
 Heil, Alexander [VerfasserIn]   i
 Schwindling, Franz Sebastian [VerfasserIn]   i
 Rammelsberg, Peter [VerfasserIn]   i
 Bendszus, Martin [VerfasserIn]   i
 Heiland, Sabine [VerfasserIn]   i
Titel:PETRA, MSVAT-SPACE and SEMAC sequences for metal artefact reduction in dental MR imaging
Verf.angabe:Tim Hilgenfeld, Marcel Prager, Alexander Heil, Franz Sebastian Schwindling, Mathias Nittka, David Grodzki, Peter Rammelsberg, Martin Bendszus, Sabine Heiland
Umfang:9 S.
Fussnoten:First online: 11 July 2017 ; Gesehen am 21.06.2018
Titel Quelle:Enthalten in: European radiology
Jahr Quelle:2017
Band/Heft Quelle:27(2017), 12, S. 5104-5112
ISSN Quelle:1432-1084
 1613-3757
Abstract:Objectives: Dental MRI is often impaired by artefacts due to metallic dental materials. Several sequences were developed to reduce susceptibility artefacts. Here, we evaluated a set of sequences for artefact reduction for dental MRI for the first time.Methods: Artefact volume, signal-to-noise ratio (SNR) and image quality were assessed on a 3-T MRI for pointwise encoding time reduction with radial acquisition (PETRA), multiple-slab acquisition with view angle tilting gradient, based on a sampling perfection with application-optimised contrasts using different flip angle evolution (SPACE) sequence (MSVAT-SPACE), slice-encoding for metal-artefact correction (SEMAC) and compared to a standard SPACE and a standard turbo-spin-echo (TSE) sequence. Field-of-view and acquisition times were chosen to enable in vivo application. Two implant-supported prostheses were tested (porcelain fused to metal non-precious alloy and monolithic zirconia). Results: Smallest artefact was measured forTSE sequences with no difference between the standard TSE and the SEMAC. MSVAT-SPACE reduced artefacts about 56% compared to the standard SPACE. Effect of the PETRA was dependent on sample used. Image quality and SNR were comparable for all sequences except PETRA, which yielded poor results. Conclusion: There is no benefit in terms of artefact reduction for SEMAC compared to standard TSE. Usage of MSVAT-SPACE is advantageous since artefacts are reduced and higher resolution is achieved. Key Points: SEMAC is not superior to TSE in terms of artefact reduction. MSVAT-SPACE reduces susceptibility artefacts while maintaining comparable image quality.PETRA reduces susceptibility artefacts depending on material but offers poor image quality
DOI:doi:10.1007/s00330-017-4901-1
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Verlag: http://dx.doi.org/10.1007/s00330-017-4901-1
 Verlag: https://link.springer.com/article/10.1007/s00330-017-4901-1
 DOI: https://doi.org/10.1007/s00330-017-4901-1
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1576730735
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