Pattern of contrast dye spreading

Paravertebral segments

Intercostal segments

Thoracic levels overlaid

Cloud-like, n = 9

0

0.1 (0 - 1)

2.3 (1 - 3)

Longitudinal, n = 28

2.6 (1 - 5)

1.1 (0 - 2)

0

P value

<0.01