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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 for paediatric CT: a new approach with proposed values.

Author information

1
Radiation and Nuclear Safety Authority (STUK), PO Box 14, 00881 Helsinki, Finland hannu.jarvinen@stuk.fi.
2
Helsinki University Hospital, Helsinki, Finland.
3
Radiation and Nuclear Safety Authority (STUK), PO Box 14, 00881 Helsinki, Finland.
4
Tampere University Hospital, Tampere, Finland.
5
Oulu University Hospital, Oulu, Finland.
6
Kuopio University Hospital, Kuopio, Finland.

Abstract

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.

PMID:
25833898
DOI:
10.1093/rpd/ncv044
[Indexed for MEDLINE]

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