High spatial-resolution CE-MRA of the carotid circulation with parallel imaging: comparison of image quality between 2 different acceleration factors at 3.0 Tesla

Investigative Radiology
Kambiz NaelJ Pablo Villablanca

Abstract

We sought to evaluate and compare the image quality and vessel delineation of the carotid arteries with high spatial-resolution contrast-enhanced MRA (CE-MRA) at 3.0 T using integrated parallel acquisition (iPAT) with acceleration factors of 2 and 4. Using an 8-channel neurovascular array coil, we performed prospective high-spatial resolution CE-MRA at 3.0 T of the head and neck on 24 patients (11 men, 13 women, ages 37-89) with suspected arterio-occlusive disease who were assigned randomly to 2 groups. Twelve patients (group A) were examined with a 3D-GRE sequence using iPAT with acceleration factor of 2. For the next 12 patients (group B) a near-identical sequence with an acceleration factor of 4 was applied. Higher iPAT factors were used to increase the spatial-resolution while keeping scan time unchanged. Two volunteers were scanned by both protocols. Phantom measurements were performed to assess the signal-to-noise ratio (SNR). The presence of artifact, noise, image quality of the arterial segments, and the presence and degree of arterial stenosis were evaluated independently by 2 radiologists. Statistical analysis of data was performed by using Wilcoxon rank sum test and 2-sample Student t test (P < 0.05 was indicative a ...Continue Reading

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Citations

Feb 16, 2008·European Radiology·Michael FenchelStephan Miller
Mar 22, 2008·AJR. American Journal of Roentgenology·Derek G LohanJ Paul Finn
Oct 24, 2008·AJNR. American Journal of Neuroradiology·A TomasianJ P Villablanca
Nov 14, 2006·Investigative Radiology·Val M Runge
Dec 13, 2006·Journal of Magnetic Resonance Imaging : JMRI·Kambiz NaelJ Paul Finn
Jul 11, 2007·Topics in Magnetic Resonance Imaging : TMRI·Ulrich KramerStephan Miller
Jul 11, 2007·Topics in Magnetic Resonance Imaging : TMRI·Kambiz NaelStefan Gruehm
Nov 17, 2007·Investigative Radiology·Val M Runge
Apr 6, 2007·Journal of Magnetic Resonance Imaging : JMRI·Jiang DuCharles A Mistretta
Apr 15, 2009·Magnetic Resonance Imaging Clinics of North America·Benjamin Y Huang, Mauricio Castillo

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