Table 2 Summary data for CTDI_vol, _75kg, DLP_75kg, and scan length, for all examinations and clinical purposes (Mean DLP data (not weight-derived) normalised to a 16cm CTDI phantom are given for PET/CT brain)

PET/CT oncology

AC only

6

1.4

1.4

0.3

2.4

8.0

141

136

29

263

9.0

102

103

87

114

1.3

L/C

15

2.7

2.6

1.8

4.9

2.7

270

258

169

498

2.9

99

99

80

116

1.5

Diagnostic^a

11

9.9

8.5

6.4

14.8

2.3

963

825

683

1445

2.1

100

98

85

124

1.5

PET/CT infection/inflammation

AC only

4

1.8

1.4

0.3

4.4

14.7

194

131

27

488

18.1

101

98

95

113

1.2

L/C

13

3.3

2.5

1.8

7.0

3.9

346

326

169

619

3.7

110

104

89

167

1.9

Diagnostic

1

8.5

-

-

-

-

766

-

-

-

-

90

-

-

-

-

PET/CT brain

AC only

11

4.2

5.7

0.5

8.5

17.0

94

104

13

196

15.0

22

23

17

25

1.5

L/C

9

15.0

10.7

3.1

66.9

21.6

302

211

71

1194

16.8

22

23

18

25

1.4

Diagnostic

1

45.8

-

-

-

-

1068

-

-

-

-

23

-

-

-

-

PET/CT and SPECT/CT cardiac

AC only

30

2.1

1.6

0.4

7.1

17.8

40

35

5

98

19.6

23

23

14

33

2.4

L/C

7

2.7

1.9

1.3

8.0

6.2

67

39

28

157

5.6

20

20

19

21

1.1

SPECT/CT lung

AC only

2

5.7

5.7

0.4

11

27.5

185

185

13

356

27.4

34

34

32

36

1.1

L/C

12

2.6

2.5

1.1

5.6

5.1

93

89

42

177

4.2

36

35

30

43

1.5

SPECT/CT bone

AC only

1

2.1

-

-

-

-

235

-

-

-

-

111

-

-

-

-

L/C

30

2.8

2.0

1.1

7.3

6.6

153

108

40

402

10.0

55

43

37

114

3.1

Diagnostic

1

2.34

-

-

-

-

255

-

-

-

-

69

-

-

-

-

SPECT/CT parathyroid

AC only

1

3.2

-

-

-

-

100

-

-

-

-

32

-

-

-

-

L/C

13

4.1

3.5

1.5

10.6

7.1

150

131

37

292

7.8

40

40

24

62

2.6

Diagnostic

1

15.6

-

-

-

-

365

-

-

-

-

24

-

-

-

-