title: X-ray population exposure from projection radiology and computed tomography in Emilia-Romagna from 2001 to 2010: comparison of ICRP 60 and ICRP 103 weighting factors.
abstract: OBJECTIVE
  This paper shows the trends from 2001 to 2010 of per caput and collective effective dose (S) to the Emilia-Romagna population due to radiation exposure from projection radiology (PR) and computed tomography (CT), calculated according to both ICRP60 and ICRP103 tissue weighting factors.
  
  
  METHODS
  The frequency of examinations and dose calculations were based on data provided directly by Emilia-Romagna Health Trusts. In particular, effective doses were evaluated using the tissue weighting (w T) factors reported both in ICRP60 (w T,60) and in ICRP103 (w T,103).
  
  
  RESULTS
  A decrease in the frequency of PR skull examinations and an increase in the frequency of mammography, CT of the abdomen, chest, and head-neck were found during the decade. In 2010, the PR/CT procedures contributed 75.4 %/24.6 % to examination frequency and approximately 10 %/90 % to dose; S was 6,169.2 man Sv when w T,60 was used and 5,855.1-6,665.5 man Sv when w T,103 in two different mathematical models was utilised.
  
  
  CONCLUSIONS
  Dose estimates pre- and post-ICRP103 must be compared carefully, because changes due to different radiological practices could be confused with changes due to the use of different w T's. In general, dose evaluations with the use of w T,60 until 2007 and w T,103 from 2008 seem to be consistent and coherent.
authors: U.O. Fisica Sanitaria, Policlinico S. Orsola Malpighi, Azienda Ospedaliero Universitaria di Bologna, Via Massarenti 9, 40138, Bologna, Italy, gaetano.compagnone@aosp.bo.it.
authors: Gaetano
authors: G
authors: Compagnone
authors: Paola
authors: P
authors: Angelini
authors: Sara
authors: S
authors: Domenichelli
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D007558:Italy; D008297:Male; D011829:Radiation Dosage; D011835:Radiation Protection; D015900:Radiography, Dual-Energy Scanned Projection; D011874:Radiometry; D014057:Tomography, X-Ray Computed