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Table 2 Reachable volume results for referential motion capture system (Optotrak) and various IMU sensor placements

From: Infant trunk posture and arm movement assessment using pressure mattress, inertial and magnetic measurement units (IMUs)

Vol. type Vol. [c m3] Vol. normalized to Optotrak [%]
  Opto 2IMUs 1UA 1FA
Concave 2724 96.4 57.7 59.5
Convex 4595 107.4 95.4 131.7