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editorial
. 2010 Jul 6;5:45. doi: 10.1186/1745-6150-5-45

Figure 1.

Figure 1

Virtual horizontal sections of 2D MRI scans of whole sea urchins (A, C) reveal distinct shapes of protractor muscles in Paracentrotus lividus (B) and Echinometra mathaei (D) (arrows). Magnetic resonance imaging was carried out in Berlin, Germany using a high-field MRI scanner with a 7 T super-conducting electromagnet (Bruker Biospin GmbH, Ettlingen, Germany). Image processing of the ~10 MB large raw image datasets was carried out using ImageJ 1.42q (NIH, Bethesda, USA) and its Volume Viewer plug-in on a standard office PC. The sea urchin (Echinodermata: Echinoidea) species shown here were collected in the wild (Paracentrotus lividus) or taken from a museum collection (Echinometra mathaei, NHM 1969.5.1.61-75).