Indication-based national diagnostic reference levels for paediatric CT: a new approach with proposed values

Radiat Prot Dosimetry. 2015 Jul;165(1-4):86-90. doi: 10.1093/rpd/ncv044. Epub 2015 Apr 1.


Indication-based national diagnostic reference levels (DRLs) for a few most common paediatric computed tomography (CT) examinations are proposed. Patient dose data (CTDI vol and dose length product) were collected for over 1000 patients in 4 university hospitals with best experiences in paediatric CT. Four indications for chest CT and two for abdomen (abdomen + pelvis), chest + abdomen and head CT were considered. The DRLs for the body examinations are proposed as exponential DRL-curves, where CTDI vol and dose length product are presented as a function of patient weight. The same DRL curve applies to all the indications studied. The basic 75 % level curve is supplemented by 50 % level curve to enable considerations on varying levels of technology. For head CT, DRLs are proposed for a few age groups (1, 1-5, 5-10 and 10-15 y), separately for routine CT and CT for ventricular size. The proposed DRLs are generally lower than the few published DRLs in other countries.

MeSH terms

  • Algorithms
  • Child
  • Finland
  • Hospitals
  • Humans
  • Pediatrics / standards
  • Radiation Dosage*
  • Radiometry / methods
  • Reference Values
  • Risk Assessment
  • Tomography Scanners, X-Ray Computed*
  • Tomography, X-Ray Computed / methods*
  • Tomography, X-Ray Computed / standards*