MR cholangiopancreatography: comparison between half-Fourier acquisition single-shot turbo spin-echo and two-dimensional turbo spin-echo pulse sequences |
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Authors: | T K Kim J K Han S J Kim S H Bae B I Choi |
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Institution: | (1) Department of Radiology, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul 110-744, Korea, KR;(2) Department of Radiology, Hallym University College of Medicine, Korea, KR |
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Abstract: | Background: To compare half-Fourier acquisition single-shot turbo spin-echo (HASTE) magnetic resonance cholangiopancreatography (MRCP)
with two-dimensional turbo spin-echo (2D TSE) MRCP for imaging pancreatobiliary diseases.
Methods: Twenty-seven patients with biliary or pancreatic disease underwent MRCP on a 1.0-T scanner with a body phased-array coil.
A T2-weighted HASTE sequence (18 s) and a T2-weighted 2D TSE sequence (45 s) were used during a breath-hold by the patient.
The source images and maximum intensity projection images of both sequences were reviewed independently by two radiologists.
Results: Motion artifacts were more severely pronounced with 2D TSE sequences than with HASTE sequences (p < 0.001). All obstructions and their sites were accurately identified with both sequences. Filling defects (calculi) in bile
ducts were identified in all 22 segments (100%) with HASTE-MRCP, whereas calculi in 19 of 22 segments (86%) were identified
with 2D TSE-MRCP (p= 0.25). Three missed sites on 2D TSE-MRCP were intrahepatic bile ducts.
Conclusions: HASTE-MRCP is superior to 2D TSE-MRCP in terms of detecting motion artifacts and visualization of the pancreatic ducts. HASTE-MRCP
is comparable to 2D TSE-MRCP for visualization of the biliary ducts and their obstruction and is superior to 2D TSE-MRCP for
identification of calculi in intrahepatic bile ducts.
Received: 16 April 1997/Accepted: 28 May 1997 |
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Keywords: | : Bile ducts MR— Magnetic resonance (MR) comparative studies— Magnetic resonance (MR) half-Fourier imaging |
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