Table 3 Intensity changes in IMS signals between pre- and postoperative measurements: Area no. 1–25 (see Fig. 2), preoperative and postoperative signal count (n of 22 patients with IMS signal in measurement), Δ of IMS signal intensity (0: no or little changes, +: increased signal, −: decreased signal)

1

21/22

20/22

0

2

21/22

19/22

0

3

20/22

17/22

+

4

21/22

17/22

−

5

20/22

18/22

+

6

13/22

19/22

+

7

20/22

14/22

0

8

16/22

13/22

0

9

22/22

22/22

0

10

16/22

13/22

0

11

20/22

15/22

−

12

12/22

15/22

+

13

15/22

12/22

−

14

13/22

13/22

0

15

21/22

16/22

−

16

20/22

11/22

−

17

7/22

11/22

0

18

11/22

14/22

+

19

10/22

12/22

+

20

4/22

13/22

+

21

17/22

17/22

0

22

9/22

9/22

0

23

19/22

18/22

0

24

0/22

2/22

0

25

1/22

0/22

0