Resolution improvement in thick-slab magnetic resonance digital subtraction angiography using SENSE at 3T

Journal of Magnetic Resonance Imaging : JMRI
Paul E SummersAnton Valavanis

Abstract

To evaluate the use of parallel imaging (sensitivity encoding [SENSE]) to improve spatial resolution and achieve sub-second temporal resolution in fluoroscopic contrast-enhanced, magnetic resonance digital subtraction angiography (MR-DSA). A MR-DSA sequence was optimized on a 3-T scanner with respect to sampling bandwidth and SENSE acceleration factor subject to the constraints of half-second acquisition time and 0.6 x 1.2 mm in-plane resolution. MR-DSA with and without SENSE acceleration was then evaluated in patients with arterio-venous malformations (AVMs). Consistent with previously reported results and theory, SENSE factors greater than two and increasing sampling bandwidth both led to increasing image noise. Compared to lower resolution MR-DSA images with similar temporal resolution, the SENSE accelerated sequence provided better spatial resolution without notable changes in the contrast enhancement of the vascular territories of the AVMs but was hampered somewhat in the late venous phases by a reconstruction artifact. SENSE acceleration of MR-DSA by a factor of two allows improved temporal or spatial resolution without significant loss of image quality. Signal-to-noise degradation associated with higher SENSE acceleratio...Continue Reading

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Citations

May 4, 2010·Child's Nervous System : ChNS : Official Journal of the International Society for Pediatric Neurosurgery·Zareen FatimaTsutomu Araki
Jul 11, 2007·Topics in Magnetic Resonance Imaging : TMRI·Harald KramerStefan O Schoenberg
Aug 12, 2008·Topics in Magnetic Resonance Imaging : TMRI·Derek G LohanJ Paul Finn
Apr 10, 2008·AJNR. American Journal of Neuroradiology·R L WolfR W Hurst
Dec 18, 2013·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Hee Kwon SongDanny J J Wang
Jan 30, 2007·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Fa-Hsuan LinStefan Posse

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