Table 3 The scan interval of different CT images.

From: A multicenter dataset for lymph node clinical target volume delineation of nasopharyngeal carcinoma

Patient with IC#

Patient with adaptive RT*

Patient

Scan interval (days)

Patient (n = 8)

Scan interval (days)(CTRA to CTRB)

Scan interval (days) (CTRB to CTRC)

1

48

A

28

18

2

66

B

30

16

3

67

C

21

15

4

45

D

28

20

5

67

E

30

18

6

70

F

32

22

7

48

G

24

16

8

72

H

36

18

9

42

mean days

28.6

17.9

10

72

11

68

12

66

mean days

60.9

  1. # means 12 patients who underwent two CT scans before induction chemotherapy (IC) and after induction chemotherapy. * Denotes eight patients who underwent three repeated CT scans during adaptative radiotherapy (RT). These scans were performed after 0, 15-20, and 25-30 fractions and labelled as CTRA, CTRB, and CTRC, respectively. - means not applicable.