Table 1 Manual and volumetric analysis of selected structures

Diameter midbrain^a

(in mm)

8.17

1.06

9.45

0.95

10.37

0.99

10.74

0.70

Diameter pons^a

(in mm)

16.81

1.50

16.69

1.31

17.41

1.18

17.94

0.96

Diameter ratio in %^a

midbrain/pons

49

58

57

7

60

5

60

6

Area midbrain^a

(in mm²)

81

18

105

17

130

26

135

23

Area pons^a

(in mm²)

449

58

505

56

534

50

546

51

Area ratio in %^a midbrain/pons

(in per cent)

16

3

21

3

25

5

25

5

Volume midbrain

(in mm³)

5595

680

6051

566

6646

802

6882

844

Volume pons

(in mm³)

13,678

1726

13,797

1699

15,161

1845

15,787

1987

Volume ratio in %^a

midbrain/pons

41

3

44

3

44

3

44

2

Volume SCP

(in mm³)

245

51

256

45

280

53

282

67

Volume ratio in %^a

(midbrain + SCP)/pons

43

3

46

3

46

3

46

2

Volume medulla oblongata (in mm³)

4354

550

4397

448

4790

557

4982

541

Volume whole brainstem (in mm³)

23,827

2814

24,501

2624

26,908

3065

28,020

3322