Magnetic resonance imaging-induced forces on video capsule endoscopes: First systematic in vitro assessment

Figure 9 Box plots of magnetically induced torque and gravity-induced torque on video capsule endoscopes. A: Magnetically induced torque on video capsule endoscopes (VCEs) without an integrated permanent magnet (left; measured) and with an integrated permanent magnet (right; calculated from displacement force); B: Worst-case torque due to gravity on VCEs without (left) and with (right) an integrated permanent magnet. The lengths of the boxes mark the 25^th and 75^th percentiles, the yellow lines indicate the 50^th percentile (median), and the whiskers represent the 1.5-fold interquartile range. Note the different scales of the Y-axis in Figure 9A and B.