Fig 2.

Ultrasound images in (a) standing position (b) supine position (c) prone position (d) sitting with lateral bending position (e) prone with lateral bending position. The left thoracolumbar curve ranged from T8 to L3 (apex at T11) with the magnitude of 26.6° in standing position, 13.5° in supine position, 12.3° in prone position, -19° in sitting with lateral bending position, and -12.8° in prone with lateral bending position (negative value refers to the curve being corrected to the opposite direction).