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An 8-channel coil boosts carotid MRI vessel wall SNR ~1.7-fold over a 4-channel coil.
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PURPOSE: To design and compare an eight-channel phased array (PA) coil for carotid imaging to an established four-channel PA design at 3T. MATERIALS AND METHODS: An eight-channel PA (8PA) coil was designed specifically for imaging the carotid bifurcation and compared with the existing four-channel (4PA) design using a phantom and by in vivo black-blood magnetic resonance imaging (MRI). The 8PA and 4PA were compared in terms of coverage, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR). RESULTS: The 8PA showed up to 1.7-fold improvement in SNR at a depth of 3.5 cm and greater longitudinal coverage at a given SNR on a phantom. The 8PA showed improved vessel wall SNR for high spatial resolution (0.63 mm(2)) PD, T1, and T2 (1.7, 1.7, 1.6 times, respectively; P <or= 0.002) and improved CNR (1.7, 1.6, 1.5 times, respectively; P <or= 0.002). Ultrahigh-resolution (0.27 mm(2)) T1-weighted images showed better SNR and CNR (1.4 times, P <or= 0.0001) on 8PA compared to 4PA. CONCLUSION: Carotid imaging studies may benefit from the improved SNR and larger coverage provided by use of the 8PA.
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Balu et al. (2009) studied Carotid plaque imaging. Eight-channel phased array (8PA) coil at 3T vs. Four-channel phased array (4PA) coil at 3T was evaluated on Coverage, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) (1.6 to 1.7-fold SNR improvement; 1.5 to 1.7-fold CNR improvement, p=<=0.002). The 8-channel phased array coil improved carotid MRI vessel wall SNR and CNR compared to the 4-channel coil at 3T.
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