Usefulness of 3D balanced turbofieldecho MR sequ

Authors: Masaki Ogawa Yoshiyuki Ozawa Kengo Ohta Tomoya Sekiguchi Shingo Omata Misugi Urano Yoichi Matsuo Yuta Shibamoto

Publish Date: 2017/03/04

Volume: 42, Issue: 7, Pages: 1888-1895

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Abstract

For liver surgery it is crucial to preoperatively examine the course of the right posterior bile duct While MR cholangiopancreatography MRCP can only visualize the bile ducts 3D balanced turbofieldecho BTFE sequence clearly depicts the bile ducts and portal veins as well as drip infusion CT cholangiography DICCT without contrast media We evaluated whether BTFE could substitute for DICCTThirty patients undergoing MRCP and BTFE on 15T MR and DICCT were evaluated Two readers retrospectively evaluated the branching pattern supratype A–C or infratype D–E and scored the degree of confidence and motion artifacts using a 3point scale for the three 2mmthick reconstructed imagesThe bile duct diameter did not differ between DICCT and MRCP p = 007 Five patients 17 had intrahepatic biliary dilatation 3 mm The A B C D and E types were diagnosed in 21 6 1 1 and 1 patient respectively 28 supratypes and 2 infratypes on DICCT For DICCT MRCP and BTFE the mean motion artifact scores were 30/30 27/26 and 29/28 respectively The mean diagnostic confidence scores were 29/29 24/24 and 29/28 respectively with no difference between DICCT and BTFE The concordance between DICCT and BTFE was high infra or supratype κ = 100/100 A–E κ = 086/066 but it was poor between DICCT and MRCP infra or supratype κ = 035/−005 A–E κ = 033/041 for both readersAll procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards For this type of study formal consent is not required

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