Fig. 1

The region of interest sites of the paraspinal muscles on magnetic resonance imaging. A A patient (≥ 6-month survival period) with relatively normal paraspinal muscles B A patient (< 6-month survival period) with a low quantity of the erector spinae muscle (10.2 cm2/m2) with muscular atrophy and fat infiltration.P, psoas muscle; Q, quadratus lumborum; E, erector spinae; M, multifidus