Ultrasound image acquisition method. A: Motorized articulated table capable of moving in the sagittal plane 15° at a rate of 0.5 Hz. The subject is positioned prone on the table with the hinge point at the L4-5 level. B: Location of ultrasound transducer (posterior view).
Langevin et al. BMC Musculoskeletal Disorders 2011 12:203 doi:10.1186/1471-2474-12-203