Fig. 1. The external and internal morphology of a live crayfish reconstructed from images acquired with conventional MRI. (A) The body surface of an adult female crayfish (mass 28.8 g) reconstructed with digital 3D processing. The animal was imaged in five partitions of 40 slices each to avoid signal drop-off. Scale bar: 2 cm. (B) Internal anatomy of the same animal. Imaging parameters: T_R=1.5 s, T_E=12.5 ms; matrix dimensions: 256x128, field of view=4 cmx4 cm, number of averages=8, slice thickness, 1000 µm; voxel size, 156x312x1000 µm; acquisition time (total), 2.1 h.