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2015•Unpublished venueRequires access

MR Coronary Vessel Wall Imaging using radial k-Space Sampling and Steady-State Free-Precession

M. Katoh, Elmar Spuentrup, Arno Buecker, Matthias Stuber, R. W. Guenther, René M. Botnar

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Abstract

We investigated the impact of radial k-space sampling and steady-state free-precession (SSFP) technique on image quality in 3D MRI of the coronary vessel wall. In eleven volunteers the right coronary artery vessel wall was studied using three different navigator-gated free-breathing black-blood sequences (Cartesian and radial gradient-echo (GRE) sequences, and radial SSFP). SNR and vessel sharpness as well as the subjective motion artifact level were analyzed. Motion artifacts were significantly reduced using radial k-space sampling. Superior SNR was found for SSFP-imaging. No difference was seen for vessel border definition among the three sequences.

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What this paper is about

We investigated the impact of radial k-space sampling and steady-state free-precession (SSFP) technique on image quality in 3D MRI of the coronary vessel wall. In eleven volunteers the right coronary artery vessel wall was studied using three different navigator-gated free-breathing black-blood sequences (Cartesian and radial gradient-echo (GRE) sequences, and radial SSFP). SNR and vessel sharpness as well as the subjective motion artifact level were analyzed. Motion artifacts were significantly reduced using radial k-space sampling. Superior SNR was found for SSFP-imaging. No difference was seen for vessel border definition among the three sequences.

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Available abstract

We investigated the impact of radial k-space sampling and steady-state free-precession (SSFP) technique on image quality in 3D MRI of the coronary vessel wall. In eleven volunteers the right coronary artery vessel wall was studied using three different navigator-gated free-breathing black-blood sequences (Cartesian and radial gradient-echo (GRE) sequences, and radial SSFP). SNR and vessel sharpness as well as the subjective motion artifact level were analyzed. Motion artifacts were significantly reduced using radial k-space sampling. Superior SNR was found for SSFP-imaging. No difference was seen for vessel border definition among the three sequences.

Key concepts: Steady-state free precession imaging, Flip angle, Image quality, Pulse sequence, Physics, Cartesian coordinate system, Artifact (error), Nuclear magnetic resonance

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