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Table 2 Mean tracer concentrations by spinal region and ratio of concentrations by catheter tip level

From: Cervical catheter placement leads to improved rostral distribution of a radiolabeled 18F-baclofen analog in cynomolgus monkeys

Spinal Cord Region

Mean (µCi*min)

Ratio C1/T10

C1

T10

Cervical

84.0

5.4

15.47

Upper Thoracic

16.8

6.7

2.50

Lower Thoracic

88.3

94.3

0.94

Lumbar

71.5

81.1

0.88

Cervical + CSF

252.1

12.1

20.88

Upper Thoracic + CSF

106.7

21.4

5.00

Lower Thoracic + CSF

178.9

219.5

0.82

Lumbar + CSF

166.1

165.0

1.01

Whole body1

70,999

54,881

1.29

  1. 1The whole body includes the residual radioactivity in the image that is not included in the spinal cord or CSF regions