COMPRESSED-SENSING 3D TOF MRA IN A CLINICAL SETTING: A QUALITATIVE COMPARISON STUDY IN 45 PATIENTS

Hintergrund: Compressed-sensing (CS) techniques can be used to improve spatial resolution in TOF MRA while keeping acquisition time constant. Our aim was to compare image quality in CS TOF MRA to "conventional" (con) TOF MRA in a non-selected clinical population of 45 patients. Methoden: C...

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Bibliographic Details
Published in:Clinical neuroradiology (Munich) 2019-09, Vol.29 (S1), p.S91
Main Authors: Demerath, Theo, Karwacki, Grzegorz, Schubert, Tilman
Format: Article
Language:English
Subjects:
Comparative analysis
Medical research
Medicine, Experimental
Online Access:Get full text
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Summary:Hintergrund: Compressed-sensing (CS) techniques can be used to improve spatial resolution in TOF MRA while keeping acquisition time constant. Our aim was to compare image quality in CS TOF MRA to "conventional" (con) TOF MRA in a non-selected clinical population of 45 patients. Methoden: CS TOF MRA with a voxel size of 0.14 [mm.sup.3] (0.6 * 0.6 * 0.4 mm) was compared to con TOF MRA with a voxel size of 0.49 [mm.sup.3] (0.78 * 1.05 * 0.6 mm) in a 3T (Siemens Skyra/Skyra fit, 20 CH Head coil) MRI, giving a 70 % decrease in voxel size from con TOF to CS TOF MRA. General image quality and vessel delineation (A3, M3, M4, P2, P3, ACoA, PCom Segments and superficial temporal arteries (STA)) were blindly assessed by 2 board-certified neuroradiologists by using a 1-4 point (gen. image quality) and 1-5 (vessel delineation) point scale. Mean Scales were compared by using Mann-Whitney-U-Test; interrater agreement K-statistics were moderate to low. Ergebnisse: Mean general image quality (1.59 vs. 1.84 SE 0.093/0.079) and vessel delineation scales were rated higher in A3, M3, P2, P3, ACoA and STA Segments in CS TOF MRA compared to con TOF MRA. Diskussion: General image quality was rated slightly lower in CS TOF MRA, which might be attributable to intrinsic image noise. Vessel delineation in most intracranial and STA segments were rated higher in CS TOF MRA compared to con TOF MRA while keeping acquisition time constant, which is conformable with sparse available data [2]. Fazit: Besides being used to reduce acquisition time, Compressedsensing (CS) techniques can lead to improved spatial resolution while keeping acquisition time constant, which may improve peripheral vessel delineation.
ISSN:1869-1439