Derivation of new diagnostic reference levels for neuro-paediatric computed tomography examinations in Switzerland.

Wagner, Franca; Bize, Julie; Racine, Damien; Le Coultre, Regis; Francis, Verdun; Trueb, Philipp; Treier, Reto (2018). Derivation of new diagnostic reference levels for neuro-paediatric computed tomography examinations in Switzerland. Journal of radiological protection, 38(3), pp. 1013-1036. IOP Publishing 10.1088/1361-6498/aac69c

Wagner+et+al_2018_J._Radiol._Prot._10.1088_1361-6498_aac69c.pdf - Accepted Version
Available under License Creative Commons: Attribution (CC-BY).

Download (1MB) | Preview

PURPOSE Definition of new national diagnostic reference levels (DRLs) for volume computed tomography dose index (CTDIvol) and dose length product (DLP) for neuro-paediatric CT examinations depending on the medical indication.
 Methods: Paediatric cranial CT data sets acquired between January 2013 and December 2016 were retrospectively collected between July 2016 and March 2017 from the eight largest university and cantonal hospitals that perform most of the neuro-paediatric CTs in Switzerland. A consensus review of CTDIvol and DLP was undertaken for the three defined anatomical regions: brain, facial bone and petrous bone; each with and without contrast medium application. All indications for cranial CT imaging in paediatrics were assigned to one of these three regions. Descriptive statistical analysis of the distribution of the median values for CTDIvol and DLP yielded minimum, maximum, 25th percentile (1st quartile), median (2nd quartile) and 75th percentile (3rd quartile). New DRLs for neuro-paediatric CT examinations in Switzerland were based on the 75th percentiles of the distributions of the median values of all eight centres. Where appropriate, values were rounded such that the DRLs increase or at least remain constant as the age of the patient increases.
 Results: Our results revealed DRLs for CTDIvol and DLP up to 20% lower than the DRLs used so far in Switzerland and elsewhere in Europe.
 Conclusions: This study provides Swiss neuro-paediatric CT DRL values to establish optimum conditions for paediatric cranial CT examinations. Periodic national updates of DRLs, following international comparisons, are essential. 

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic and Interventional Neuroradiology

UniBE Contributor:

Wagner, Franca


600 Technology > 610 Medicine & health




IOP Publishing




Martin Zbinden

Date Deposited:

29 May 2018 09:18

Last Modified:

23 Oct 2019 07:08

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

CT CTDIvol DLP DRL neuro-paediatrics radiation monitoring radiation protection




Actions (login required)

Edit item Edit item
Provide Feedback