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Abstract #1496

Clinical assessment of noise corrected exponentially weighted diffusion weighted MRI (niceDWI) for imaging patients with metastatic melanoma

Annemarie Knill1,2, Matthew Blackledge1, Jessica Winfield1,2, Hannah Barnsley2, Benjamin Malawo2, Georgina Hopkinson2, Dow-Mu Koh1,2, Samuel Withey2, and Christina Messiou1,2
1The Institute of Cancer Research, London, United Kingdom, 2The Royal Marsden NHS Foundation Trust, London, United Kingdom

Synopsis

Keywords: Cancer, Diffusion/other diffusion imaging techniquesSystematic clinical validation of noise-corrected, exponentially-weighted, diffusion-weighted MRI (niceDWI) is performed in metastatic melanoma including soft tissue disease. Previous assessments of niceDWI demonstrated improvement in the in-plane bias field. No clinical advantage is found over clinical DWI: the signal-to-noise ratio was assessed as significantly worse in niceDWI both quantitatively and by an experienced reader; there was no difference demonstrated in the contrast-to-noise ratio (CNR) of bone or nodal lesions; when soft tissue disease is included CNR is significantly worse on niceDWI. It is recommended that future evaluations of niceDWI assess the maximum intensity projection for use as a survey tool.

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