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Abstract #2982

Diffusion-Weighted MRI of Normal Sized Pelvic Lymph Nodes: How to Delineate an Ideal Region of Interest?

Daniel Guo Quae Chong1, Giuseppe Petralia1,2, Michael Ith1, Johnannes Michael Froehlich1,3, Harriet Thoeny1

1Dept. of Diagnostic, Interventional & Pediatric Radiology (DIPR), Inselspital, Bern, Switzerland; 2Division of Radiology, European Institute of Oncology, Milan, Italy; 3Guerbet AG, Zurich, Switzerland

Small structure such as lymph nodes are difficult to visualized with diffusion weighted imaging. Due to the lower resolution of DWI and the size of typical lymph node, it is often the case only 1-4 pixels contain signal from lymph node with partial volume effect. This study looks at the effect of this low pixel count and mediate via image interpolation. No significant difference was found pre and post image interpolation for ADC values.