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Abstract #4842

Dynamic Contrast-Enhanced MRI Parameters Monitor and Predict Outcome of Targeted Radionuclide Therapy in Patients with Neuroendocrine Tumour Liver Metastases

Keiko Miyazaki1, Matthew R. Orton1, James A. d'Arcy1, Val Lewington2, Martin O. Leach1, David J. Collins1, Dow-Mu Koh3

1CR-UK and EPSRC Cancer Imaging Centre, The Institute of Cancer Research and Royal Marsden Hospital, Sutton, Surrey, United Kingdom; 2Department of Nuclear Medicine, Royal Marsden NHS Foundation Trust, Sutton, Surrey, United Kingdom; 3Department of Radiology, Royal Marsden NHS Foundation Trust, Sutton, Surrey, United Kingdom

Dynamic contrast-enhanced (DCE-) MRI is a technique that enables non-invasive interrogation of tissue microvascular environment. The role of quantitative DCE-MRI parameters in the assessment and prediction of response in patients with liver metastases to a targeted radionuclide therapy was investigated using both model-free and model-dependent data analyses. Distribution volume and IAUGC60 were found to be potential predictors of response. The number of fitted voxels and the enhancing fraction were found to be most sensitive in assessing treatment response. This study demonstrates the role of DCE-MRI as a potential biomarker for predicting and assessing treatment response.