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Abstract #4084

Demonstration of whole body DWI characterisation of tumour heterogeneity for serial response assessment.

Mihaela Rata 1 , Nina Tunariu 1 , Dow M Koh 1 , Stan Kaye 2 , Angela George 3 , Martin O Leach 1 , David J Collins 1 , and Matthew D Blackledge 1

1 Radiotherapy and Imaging, CR-UK and EPSRC Cancer Imaging Centre, Institute of Cancer Research and Royal Marsden Hospital, Sutton, Surrey, United Kingdom, 2 Drug Development Unit, CR-UK and EPSRC Cancer Imaging Centre, Institute of Cancer Research and Royal Marsden Hospital, Sutton, Surrey, United Kingdom, 3 Gynaecology Unit, Royal Marsden Hospital, Sutton, Surrey, United Kingdom

Intra- or inter- tumour heterogeneity is a major challenge for anticancer treatment. Our work proposes a novel whole-body DWI analysis methodology to measure therapy response in disseminated disease, as exemplified on a metastatic ovarian cancer patient. The longitudinal tumour behaviour (over 10 visits) was continuously assessed during therapy at multiple sites of metastasis. Such analysis allows full characterization and visualisation of disease burden and observation/quantification of individual tumour response to therapy at each individual site. Histogram and volumetric assessment of individual lesions provides additional information regarding treatment compared to overall assessments of total tumour burden and global ADC distributions.

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