Novel Ultrafast Spiral Head MR Angiography Compared to Standard MR and CT Angiography.

Greve, Tobias; Sollmann, Nico; Hock, Andreas; Zimmer, Claus; Kirschke, Jan S

doi:10.1111/jon.12791

Benutzer: Gast

Medizin

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Titel:: Novel Ultrafast Spiral Head MR Angiography Compared to Standard MR and CT Angiography.
Dokumenttyp:: Journal Article
Autor(en):: Greve, Tobias; Sollmann, Nico; Hock, Andreas; Zimmer, Claus; Kirschke, Jan S
Abstract:: BACKGROUND AND PURPOSE: Intracranial vessel imaging by time-of-flight MR angiography (TOF-MRA) is one of the most frequently performed investigations in clinical neuroradiology. Particularly in the acute setting, fast imaging is needed for diagnostics, with a sequence ideally depicting even small vessels. The purpose of this study was to compare image and diagnostic quality of a novel ultrashort TOF-MRA sequence accelerated by spiral imaging (TOF-Spiral-short) to a standard TOF-MRA sequence accelerated by compressed sensing (TOF-CS) and to CT angiography (CTA). METHODS: Forty-one patients (36.6% showing vessel pathologies) who had undergone TOF-CS (acquisition duration: 4 minutes 8 seconds), TOF-Spiral-short (acquisition duration: 51 seconds; spiral imaging [accelerating factor 1.3], decreased field of view [accelerating factor 1.2], and increased voxel size [accelerating factor 3.3]), and CTA were retrospectively evaluated. Assessment of image quality, diagnostic confidence, and quantification of stenosis or aneurysm diameter were performed by two readers. RESULTS: Image quality at the skull base was slightly reduced with TOF-Spiral-short compared to CTA and TOF-CS (P < .05). Delineation of small intracranial vessels was improved by TOF-Spiral-short compared to CTA (P < .0001). In TOF-Spiral-short, diagnostic confidence was not reduced compared to TOF-CS in patients with vessel pathologies. We observed no significant difference in quantitative pathology assessment between TOF-Spiral-short and the other two modalities. TOF-Spiral-short enabled the correct identification of all vessel pathologies. CONCLUSIONS: Accelerating TOF-MRA of brain-feeding arteries by a novel ultrashort spiral imaging sequence shows adequate image quality and sufficient diagnostic performance. Thus, TOF-Spiral-short holds potential for fast and reliable diagnostics of vessel pathologies, particularly in the acute setting.
Zeitschriftentitel:: J Neuroimaging
Jahr:: 2021
Band / Volume:: 31
Heft / Issue:: 1
Seitenangaben Beitrag:: 45-56
Volltext / DOI:: doi:10.1111/jon.12791
PubMed:: http://view.ncbi.nlm.nih.gov/pubmed/33118692
Print-ISSN:: 1051-2284
TUM Einrichtung:: Fachgebiet Neuroradiologie (Prof. Zimmer)
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