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Table 1 Overview of high-field MRI scanners (Bruker BioSpin MRI GmbH, Ettlingen, Germany) employed in this study

From: A dataset comprising 141 magnetic resonance imaging scans of 98 extant sea urchin species

Model Location Magnet Resonance frequency Gradient system Gradient strength Resonator
7 T PharmaScan 70/16 Charité-Universitätsmedizin Berlin, Germany Superconducting, 160 mm horizontal bore 1H, 300 MHz Actively shielded, inner Ø 90 mm 300 mT/m 1H, linear volume resonator, inner Ø 38 mm
7 T BioSpec 70/20 Universität Würzburg, Germany Superconducting, 200 mm horizontal bore 1H, 300 MHz Actively shielded, inner Ø 90 mm 700 mT/m 1H, quadrature volume resonator, inner Ø 72 mm
9.4 T BioSpec 94/20 Universitätsklinikum Münster, Germany Superconducting, 200 mm horizontal bore 1H, 400 MHz Actively shielded, inner Ø 60 and 120 mm 720 mT/m and 1 T/m 1H, CryoProbe transmit-receive surface resonator and quadrature volume resonator, inner Ø 35 and 72 mm
9.4 T AVANCE 400WB Leibniz-Institut für Molekulare Pharmakologie, Berlin, Germany Superconducting, 89 mm vertical bore 1H, 400 MHz Actively shielded, inner Ø 40 mm 1 T/m 1H, linear volume resonator, inner Ø 30 mm
17.6 T AVANCE 750WB Universtität Würzburg, Germany Superconducting, 89 mm vertical bore 1H, 750 MHz Actively shielded, inner Ø 40 mm 1 T/m 1H, linear volume resonator, inner Ø 5 and 20 mm