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Table 1 (A) k-Factors in various tissues. (B) Calculation of effective dose in each exam

From: Multi-detector computed tomography in traumatic abdominal lesions: value and radiation control

(A)

Region of Body

0

1 years old

5 years old

10 years old

Adult

Head and Neck

0.013

0.0085

0.0057

0.0042

0.0031

Head

0.011

0.0067

0.0040

0.0032

0.0021

Neck

0.017

0.012

0.011

0.0079

0.0059

Chest

0.039

0.026

0.018

0.013

0.014

Abdomen and Pelvis

0.049

0.030

0.020

0.015

0.015

Trunk

0.044

0.028

0.019

0.0 14

0.015

(B)

Conversion of total DLP to effective dose

Patient age

Type of exam

Total DLP (mgy/cm)

Effective dose (msv)

5 years

Monophasic

82.4

1.6

9 years

Monophasic

119

2.4

17 years

Triphasic

347

5.2

17 years

Biphasic

327

4.9

18 years

Biphasic

308.3

4.6

20 years

Triphasic

692.9

10.4

25 years

Triphasic

668

10.02

25 years

Triphasic

666

10

27 years

Biphasic + enema

1350

20.3

34 years

Triphasic

855

12.8

42 years

Biphasic

439.6

6.6

53 years

Triphasic

1103

16.6

  1. NB. Table 1B shows representative group of our patients, conversion of Total DLP to Effective dose, through multiplication by K-factors tissue weighting considering age (according to Table 1A)