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Table 3 Estimated annual number of CT examinations and collective dose in Japan.

From: Radiation Exposure from CT Examinations in Japan

CT examination

 

Annual number of CT examination (*106)

Annual collective dose

(*103 Sv person)

Head

Total

9.1

23.6

 

   Men

   4.6

   12.1

 

   Women

   4.5

   11.5

Face

Total

1.4

2.8

 

   Men

   0.7

   1.5

 

   Women

   0.7

   1.3

Neck

Total

10.1

26.5

 

   Men

   5.6

   14.8

 

   Women

   4.5

   11.7

Chest

Total

12.5

120.0

 

   Men

   7.0

   67.8

 

   Women

   5.5

   52.2

Upper abdomen

Total

10.3

83.1

 

   Men

   5.7

   47.1

 

   Women

   4.6

   36.0

Lower abdomen

Total

2.1

21.3

 

   Men

   1.1

   12.0

 

   Women

   1.0

   9.3

Total

Total

45.4

277.4

 

   Men

   24.7

   155.3

 

   Women

   20.8

   122.1