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MR cholangiography in biliary obstruction using half-Fourier acquisition
1Department of Imaging, Johns Hopkins Bayview Medical Center, Johns Hopkins University School of Medicine, Baltimore, MD 21224, USA.
Journal of Computer Assisted Tomography
|July 1, 1996
Summary
Half-Fourier acquisition (HASTE) MR cholangiography accurately detects biliary obstruction. This fast, safe imaging technique is suitable for ill patients and offers an alternative to direct cholangiography.
Area of Science:
- Radiology
- Medical Imaging
Background:
- Biliary obstruction diagnosis requires accurate imaging.
- Conventional cholangiography methods can be invasive.
Purpose of the Study:
- To evaluate the efficacy of T2-weighted, turbo, SE MR sequence with half-Fourier acquisition (HASTE) for biliary obstruction assessment.
- To compare HASTE MR cholangiography (MRC) with established cholangiography techniques.
Main Methods:
- Prospective study of 21 patients with obstructive jaundice.
- Comparison of HASTE MRC against ERCP and PTCA.
- Evaluation of normal volunteers for control data.
Main Results:
- HASTE MRC accurately depicted biliary dilatation (100%) and obstruction level (87%).
- Causes of obstruction, such as strictures and stones, were identified in all cases.
- High interobserver agreement was achieved for all assessed parameters.
Conclusions:
- HASTE MRC is a safe and accurate method for diagnosing biliary obstruction.
- The rapid 13-second scan time makes it ideal for unstable patients.
- HASTE MRC is a viable alternative to direct cholangiography in select cases.