title: Improved diagnosis of common bile duct stone with single-shot balanced turbo field-echo sequence in MRCP.
abstract: To evaluate the value of adding single-shot balanced turbo field-echo (b-TFE) sequence to conventional magnetic resonance cholangiopancreatography (MRCP) for the detection of common bile duct (CBD) stone.
  
  
  
  One hundred thirty-seven consecutive patients with suspected CBD stone underwent MRCP including single-shot b-TFE sequence. Twenty-five patients were confirmed with CBD stone by endoscopic retrograde cholangiopancreatography or ultrasonography. Two radiologists reviewed two image protocols: protocol A (conventional MRCP protocol: unenhanced T1-, T2-, and respiratory-triggered three-dimensional fat-suppressed single-shot turbo spin-echo MRCP sequence) and protocol B (protocol A plus single-shot b-TFE sequence). The sensitivity, specificity, positive (PPV) and negative predictive value (NPV), and area under the receiver-operating-characteristic (ROC) curve (AUC) for the detection of CBD stone were compared.
  
  
  
  The sensitivity (72%) and NPV (94%) were the same between the two protocols. However, protocol B was greater in the specificity (99%) and PPV (94%) than protocol A (92% and 67%, respectively) (P = 0.0078 and 0.031, respectively). The AUC was significantly greater for protocol B (0.93) than for protocol A (0.86) (P = 0.026).
  
  
  
  Inclusion of single-shot b-TFE sequence to conventional MRCP significantly improved the specificity and PPV for the detection of CBD stone.
authors.affiliation: Department of Radiology, Gifu University, 1-1 Yanagido, Gifu, 501-1194, Japan.
authors.forename: Yoshifumi
authors.initials: Y
authors.lastname: Noda
authors.affiliation: Department of Radiology, Gifu University, 1-1 Yanagido, Gifu, 501-1194, Japan. gossy@par.odn.ne.jp.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Goshima
authors.affiliation: Department of Radiology, Gifu Municipal Hospital, Gifu, Japan.
authors.forename: Toshihisa
authors.initials: T
authors.lastname: Kojima
authors.affiliation: Department of Radiology, Gifu Municipal Hospital, Gifu, Japan.
authors.forename: Shimpei
authors.initials: S
authors.lastname: Kawaguchi
authors.affiliation: Department of Radiology, Gifu University, 1-1 Yanagido, Gifu, 501-1194, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kawada
authors.affiliation: Department of Radiology, Gifu University, 1-1 Yanagido, Gifu, 501-1194, Japan.
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Kawai
authors.affiliation: Department of Radiology, Gifu University, 1-1 Yanagido, Gifu, 501-1194, Japan.
authors.forename: Hiromi
authors.initials: H
authors.lastname: Koyasu
authors.affiliation: Department of Radiology, Gifu University, 1-1 Yanagido, Gifu, 501-1194, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Matsuo
authors.affiliation: Department of Radiology, University of Pittsburgh Medical Center, Pittsburgh, PA, USA.
authors.forename: Kyongtae T
authors.initials: KT
authors.lastname: Bae
mesh_terms: D000328:Adult; D000368:Aged; D002760:Cholangiopancreatography, Endoscopic Retrograde; D049448:Cholangiopancreatography, Magnetic Resonance / Q000379:methods; D003135:Common Bile Duct / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005260:Female; D042882:Gallstones / Q000000981:diagnostic imaging*; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008297:Male; D008875:Middle Aged; D012680:Sensitivity and Specificity; D014463:Ultrasonography
keywords: Common bile duct stone; MRCP; Positive predictive value; Single-shot balanced turbo field-echo sequence; Specificity