Abstract #0730
            In-vivo measurements of axon density and axon diameter in the Corpus Callosum in Multiple Sclerosis
                      Torben Schneider                     1                    , Wallace Brownlee                     1                    , 						Jonathan Clayden                     2                    , Olga Ciccarelli                     3                    , 						David H Miller                     1                    , Daniel C Alexander                     4                    , 						and Claudia A M Wheeler-Kingshott                     1          
            
            1
           
           NMR Research Unit, Department of 
						Neuroinflammation, Queen Square MS Centre, UCL Institute 
						of Neurology, London, United Kingdom,
           
            2
           
           UCL 
						Institute of Child Health, Imaging & Biophysics Unit, 
						London, United Kingdom,
           
            3
           
           Brain 
						Repair & Rehabilitation, UCL Institute of Neurology, 
						London, United Kingdom,
           
            4
           
           Centre of Medical 
						Image Computing, Department of Computer Science, 
						University College London, London, United Kingdom
          
            
          It is known that microstructural changes in the Corpus 
						Callosum are associated with disability in Multiple 
						Sclerosis. Here, we have used a novel diffusion MRI 
						protocol and analysis method to measure axon density and 
						diameter in the Corpus Callosum in MS in-vivo and on a 
						standard clinical scanner. Our preliminary results 
						suggest a regional decrease of axon density and increase 
						in axon diameter both in normal appearing white matter 
						and lesion tissue, which is consistent with findings 
						from ex vivo histology.
         
				
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