MR Endoscopy vs EUS: A Comparison
Richard Syms 1 , Chris Wadsworth 2 , Ian Young 1 , Marc Rea 2 , and Simon Taylor-Robinson 2
EEE Dept., Imperial College London, London,
Middlesex, United Kingdom,
Mary's Hospital, Imperial College London, London,
Middlesex, United Kingdom
Endoscopic ultrasound (EUS) is a well-established, safe
modality for real-time imaging of the duodenum and
nearby ductal systems. However, all echo-ranging imaging
suffers from artifacts, the most significant being
reverberation between impedance discontinuities. As a
result, concentric artifacts dominate the near field.
These artifacts cannot be suppressed without eliminating
the fundamental contrast mechanism, unless a nonlinear
contrast agent is used. As a result, EUS images are hard
to interpret, and repeated scans are required. Although
slower, internal MRI may therefore offer advantages. The
aim of this paper is to compare the performance of a new
MR-imaging duodenoscope with EUS.
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