Physics in Medicine and Biology Physics in Medicine and Biology, IOP Publishing, 2010, 55 (21), pp.N507. ⟨10.1088/0031-9155/55/21/⟩ Physics in Medicine and Biology, 55(21), N507-N519. IOP Publishing Ltd. Physics in Medicine and Biology, 2010, 55 (21), pp.N507. ⟨10.1088/0031-9155/55/21/⟩