Usefulness of the Short–Echo Time Cube Sequence at 3-T Magnetic Resonance Cholangiopancreatography

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  • Prospective Comparison With the Conventional 3-Dimensional Fast Spin-Echo Sequence

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We evaluated prospectively the clinical use of the short-echo time (TE) Cube sequence for magnetic resonance cholangiopancreatography (MRCP) at 3 T.Using a 3-T unit, we subjected 41 consecutive patients to short-TE Cube MRCP and conventional 3-dimensional fast spin-echo (3D-FSE) MRCP. Two radiologists independently rated the image quality and the visibility of the right and left hepatic, cystic, common bile, and main pancreatic ducts and the gallbladder on a 4-point scale. The averaged visual scores by 2 readers for the image quality were calculated, and the artifacts were evaluated in cases with relatively lower (3) score. The signal-to-noise ratio, contrast-to-noise ratio, and acquisition time were evaluated by quantitative analysis.The visual scores of the common bile duct (P0.05), cystic duct (P0.01), and gallbladder (P0.01) were significantly higher for Cube than 3D-FSE MRCP. Signal-to-noise ratio was also significantly higher for Cube than 3D-FSE MRCP (P0.01). There was no significant difference in the image acquisition time (352.1 ± 93.0 vs 314.1 ± 126.2 seconds, P = 0.059). Four cases on 3D-FSE MRCP and 2 cases on Cube MRCP have relatively lower image quality; however, the difference was not significant (P = 0.18).The visibility of biliary structures is significantly better on short-TE Cube MRCP than conventional 3D-FSE MRCP images at a clinically acceptable acquisition time.

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