Abstract #1615
Abdominal diffusion imaging parameters from free-breathing multiple-averaged and finely-sampled decay curves compared to acquisition using active breathing control
Neil Peter Jerome 1 , Evangelia Kaza 1 , Matthew R Orton 1 , James A d'Arcy 1 , Bernd Kuehn 2 , Dow-Mu Koh 3 , David J Collins 1 , and Martin O Leach 1
1
Radiotherapy & Imaging, The Institute of
Cancer Research, Sutton, London, United Kingdom,
2
Healthcare,
Siemens AG, Erlangen, Germany,
3
Department
of Radiology, Royal Marsden Hospital, Sutton, United
Kingdom
The blurring from respiratory motion found in
free-breathing abdominal diffusion imaging can be
difficult to resolve without impacting patient comfort.
Sufficient sampling of the diffusion curve may alleviate
the need for prospective motion control; though the form
of the optimal sampling scheme must reflect the question
being asked. We compare diffusion parameters from two
alternate free-breathing schemes (32 b-values with no
averaging, and 9 b-values with 4 averages) against a 32
b-value sequence acquired under active breathing
control, and show lack of significant differences,
indicating intended choice of post-processing may be an
important consideration in designing abdominal DWI
protocols.
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