Skip to main content

Table 6 Estimated effective doses per scan and examination for each anatomical location in Japan, and comparison with previous studies.

From: Radiation Exposure from CT Examinations in Japan

CT examination   Effective dose for one scanning/one examination (mSv)
  Year
Study
2008
Current (Japan)
2000
Japan (13)
2002
Germany (15)
2003
UK (16)
2003-2004
Netherlands (14)
Head Scan 2.5 - 2.2 0.8* 1.9
  Examination 2.6 2.4 2.8 1.5 -
Face Scan 1.5 - 0.8 - -
  Examination 2.0 - 0.8 - -
Neck Scan 2.3 - - - -
  Examination 2.6 - - - -
Chest Scan 5.4 - 5.5 3.4* 3.8
  Examination 9.6 9.1 5.7 5.8 -
Upper abdomen Scan 5.7 - 5.5 3.8* 7.2
  Examination 8.1 12.9 11.5 5.3 10.2**
Lower abdomen Scan 8.3 - 6.3 - -
  Examination 10.3 10.5 7.2 - -
  1. -: no data.
  2. *: Effective doses for one examination were divided by the number of scanning of the routine sequences.
  3. **: Sum of the effective doses of arterial and portal scans.