Influence of cholecystectomy on the flow dynamic pattern of bile in the extrahepatic bile duct: Assessment by cine-dynamic MRCP with spatially-selective IR pulse
| Autor: | Katsuyoshi Ito, Kazuya Yasokawa, Akihiko Kanki, Akira Yamamoto, Hidemitsu Sotozono, Tsutomu Tamada, Takeshi Fukunaga |
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| Rok vydání: | 2019 |
| Předmět: |
Adult
Male Cholangiopancreatography Magnetic Resonance medicine.medical_treatment Biomedical Engineering Biophysics Inversion Time Bile flow Bile Ducts Extrahepatic medicine Dynamic pattern Bile Humans Radiology Nuclear Medicine and imaging In patient Cholecystectomy Aged Common bile duct business.industry Bile duct Middle Aged Control subjects medicine.anatomical_structure Female Nuclear medicine business |
| Zdroj: | Magnetic resonance imaging. 74 |
| ISSN: | 1873-5894 |
| Popis: | Purpose To evaluate the influence of cholecystectomy on the flow dynamic pattern of bile in the extrahepatic bile duct by using cine-dynamic MRCP with spatially-selective inversion-recovery (IR) pulse non-invasively. Materials and methods 56 patients with cholecystectomy and 48 control subjects without cholecystectomy who underwent cine-dynamic MRCP with spatially-selective IR pulse at 1.5 T or 3 T (TR/TE, 4000 msec/500 msec; echo train spacing, 6.5 msec; echo train length, 172; section thickness, 50 mm; matrix, 320 × 320; field of view, 320 × 320 mm; bandwidth, 488 Hz; and inversion time, 2200 msec). In cine-dynamic MRCP, IR pulse with 20 mm width was placed on the common bile duct (CBD) to evaluate the movement of bile (antegrade and reversed bile flow). Cine-dynamic MRCP imaging was scanned every 15 s (imaging, 4 s; rest, 11 s) during 5 min to acquire a series of single-shot images (a total of 20 images). The frequency that antegrade or reversed bile flow was observed in the extrahepatic bile duct, and 5-point grading score based on the moving distance of antegrade or reversed bile flow were compared between the groups. Both groups were compared using the χ2 and Mann-Whitney U tests (P Results Antegrade bile flow was observed more frequently in the cholecystectomy group than in the non-cholecystectomy group (5.1 times vs. 2.8 times, P = 0.008). Mean grading score of antegrade bile flow was significantly greater in the cholecystectomy group than in the non-cholecystectomy group (mean grade, 0.33 vs 0.21; P = 0.014). Regarding reversed bile flow, there were no significant differences in the frequency and grading score between cholecystectomy group and non-cholecystectomy group. Conclusion Antegrade bile flow was observed more frequently and predominantly in patients after cholecystectomy in cine-dynamic MRCP with spatially-selective IR pulse while reversed bile flow was observed equivalently. |
| Databáze: | OpenAIRE |
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