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Figure 1 Representative spiral high-resolution coronary artery imaging sequence (SH) images obtained from normal volunteers at varying resolution and breath-hold duration. (a) Left anterior descending coronary artery and diagonal arteries: 0.7-mm spatial resolution at 14 heart-beat breath-hold duration. (b) Distal right coronary artery: 0.7-mm spatial resolution at 14 heart-beat breath-hold duration. (c) Phantom image obtained using SH. A white block arrow points out the array of fiducial markers at 1-mm resolution.