enhanced hepatic magnetic resonance angiography at 3 T: does parallel imaging improve image quality?
Author(s): Ho LM, Merkle EM, Paulson EK, Dale BM Affiliation(s): Department of Radiology, Duke University Medical Center, Durham, NC 27710, USA. lisa.ho@duke.edu Publication date & source: 2007-03, J Comput Assist Tomogr., 31(2):177-80. Publication type: Comparative Study; Evaluation Studies PURPOSE: To evaluate whether hepatic magnetic resonance angiography (MRA) performed at 3 T and acquired with a parallel imaging acceleration factor of 2 provides satisfactory image quality and adequate contrast-to-noise, compared with an acquisition without parallel imaging. MATERIALS AND METHODS: Ten volunteers underwent both a standard (A) and an experimental (B) MRA protocol. Both protocols used a gadoteridol dose of 20 mL injected at 2 mL/s in a 3-T magnetic resonance (MR) system. Protocol B was identical to protocol A, except protocol B was performed with a parallel imaging acceleration factor of 2. Contrast-to-noise ratios (CNRs) were calculated in the suprarenal abdominal aorta, the common h
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