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Abstract #1094

Multimodal Imaging of a Mouse Model of Colorectal Carcinoma Metastasis in the Liver

Rajiv Ramasawmy 1,2 , Sean Peter Johnson 1,2 , Thomas Anthony Roberts 1 , Daniel J Stuckey 1 , Anna L David 3 , Rosamund Barbara Pedley 2 , Mark Francis Lythgoe 1 , Bernard Siow 1 , and Simon Walker-Samuel 1

1 Centre for Advanced Biomedical Imaging, University College London, London, Greater London, United Kingdom, 2 Cancer Institute, University College London, London, Greater London, United Kingdom, 3 Institute for Women's Health, University College London, London, Greater London, United Kingdom

Orthotopic tumor models are thought to provide a more clinically-representative model of disease than traditional subcutaneous implantations, although their siting often renders them more difficult to assess. In this study, we compared 1T benchtop MRI and ultrasound with our gold-standard techniques of bioluminescence imaging (for cell detection) and 9.4T MRI (for tumour volume assessment) in their ability to characterise the development of liver metastases over four weeks. No significant differences were observed in the measured tumour doubling, showing that each of these techniques can be used for characterising tumour growth in deep-sited tumours, although each has characteristic advantages and disadvantages.

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