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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