Preoperative evaluation of the cystic duct for laparoscopic cholecystectomy: comparison of navigator-gated prospective acquisition correction- and conventional respiratory-triggered techniques at free-breathing 3D MR cholangiopancreatography
Preoperative evaluation of the cystic duct for laparoscopic cholecystectomy: comparison of navigator-gated prospective acquisition correction- and conventional respiratory-triggered techniques at free-breathing 3D MR cholangiopancreatography
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DOI：
10.1007/s00330-013-2790-5
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发表时间：
2013-02
影响因子：
5.9
通讯作者：
R. Itatani;T. Namimoto;Hiroo Kajihara;A. Yoshimura;K. Katahira;J. Nasu;I. Matsushita;Fumi Sakamoto;M. Kidoh;Y. Yamashita
中科院分区：
文献类型：
--
作者：
R. Itatani;T. Namimoto;Hiroo Kajihara;A. Yoshimura;K. Katahira;J. Nasu;I. Matsushita;Fumi Sakamoto;M. Kidoh;Y. Yamashita
ObjectiveTo evaluate the quality of magnetic resonance cholangiopancreatography (MRCP) images obtained with a three-dimensional navigator-gated (NG) technique and compare findings with conventional respiratory-triggered (RT) images in pre-laparoscopic cholecystectomy patients.MethodsTurbo-spin-echo (TSE) RT-MRCP (average 242 s) and balanced turbo-field-echo (bTFE) NG-MRCP (average 263 s) were acquired at 1.5-T MRI for 49 pre-laparoscopic cholecystectomy patients. Two radiologists independently assessed image quality, visibility of anatomical structures, common bile duct (CBD) stones, and signal-to-noise ratios (SNRs). Interobserver agreement was also evaluated.ResultsThe anatomical details of the cystic duct were clearly demonstrated in 33 (67.3 %, reader A) and 35 (71.4 %, reader B) patients on RT-MRCP, and in 45 (91.8 %) and 44 (89.7 %) patients on NG-MRCP. On NG-MRCP, visualisation of the cystic duct (3.22/3.12), its origin (3.57/3.55), and the gallbladder(3.61/3.59) was statistically better than on RT-MRCP (2.90/2.78, 3.29/3.12, 2.98/2.88, respectively). The overall image quality was statistically better on NG-MRCP than RT-MRCP. Each technique identified the presence of CBD stones in all affected patients. The SNR was significantly higher on NG-MRCP (CHD 22.40, gallbladder 17.13) than RT-MRCP (CHD 17.05, gallbladder 9.30). Interobserver agreement was fair to perfect.ConclusionNavigator-gated MRCP is more useful than respiratory-triggered MRCP for evaluating the gallbladder and cystic duct in patients scheduled for laparoscopic cholecystectomy.Key Points•Magnetic resonance cholangiopancreatography (MRCP) provides important cystic duct information before laparoscopic cholecystectomy.•Navigator-gated(NG)MRCP images were better than conventional respiratory-triggered(RT)MRCP.•The signal-to-noise ratio was significantly higher for NG-MRCP than for conventional RT-MRCP.•Balancedturbo-field-echo NG-MRCP is useful for evaluating the gallbladder and cystic duct.
