Table 1 Mean tracer concentrations by grouped brain regions and ratio of concentrations by catheter tip level

Rest of Brain¹

153.4

11.2

13.67

Brain Stem

112.6

5.3

21.30

Cerebellum

77.8

4.7

16.49

Cerebellar White Matter

22.2

0.8

27.82

Vermis

14.2

1.4

10.48

Occipital Cortex

39.8

4.2

9.56

Amygdala

21.2

0.8

25.86

Anterior Cingulate Cortex

8.5

0.2

39.64

Posterior Cingulate Cortex

5.7

0.3

16.60

Limbic Cingulate Cortex

1.6

0.0

53.67

Orbitofrontal Cortex

12.7

0.9

13.50

Dorsolateral Frontal Cortex

1.5

0.2

6.21

Medial Frontal Cortex

0.7

0.1

10.05

Ventral Frontal Cortex

1.9

0.3

6.10

Precuneus

2.5

0.3

9.32

Premotor Cortex

13.2

1.4

9.24

Primary Motor Cortex

2.8

0.4

7.97

Primary Sensory Cortex

8.2

0.9

9.46

Superior Parietal Cortex

2.7

0.4

7.13

Inferior Parietal Cortex

11.7

0.9

12.42

Insula

14.3

0.4

37.90

Medial Temporal Cortex

11.1

1.2

9.13

Superior Temporal Cortex

33.9

2.1

16.14

Hippocampus

6.4

0.8

7.76

Fusiform Gyrus

4.0

1.0

4.07

Entorhinal Cortex

2.9

0.2

15.78

Inferior Temporal Cortex

3.5

0.6

6.05

Parahippocampal Gyrus

6.4

0.5

13.32

Anterior Caudate Nucleus

2.2

0.1

15.21

Posterior Caudate Nucleus

0.5

0.1

7.89

Anterior Putamen

3.7

0.2

16.25

Posterior Putamen

4.5

0.2

20.95

Ventral Posterior Putamen

0.9

0.1

9.10

External Pallidum

0.8

0.1

11.38

Internal Pallidum

0.4

0.0

11.67

Ventral Striatum

3.0

0.1

21.64

Substantia Nigra

1.2

0.1

12.24

Thalamus

2.0

0.2

7.97

Lateral Ventricle

1.5

0.2

8.33

Third and Fourth Ventricles

1.8

0.2

11.31