Reconstruction of paediatric organ doses from axial CT scans performed in the 1990s - range of doses as input to uncertainty estimates.
Objective: To assess the range of doses in paediatric CT scans conducted in the 1990s in Norway as input to an international epidemiology study: the EPI-CT study, http://epi-ct.iarc.fr/ .Methods: National Cancer Institute dosimetry system for Computed Tomography (NCICT) program based on pre-calculat...
| Publicado en: | European Radiology Vol. 26; no. 9; pp. 3026 - 3034 |
|---|---|
| Autores principales: | , , , , , , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
Springer Nature
Sep2016
|
| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=117171311&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 117171311 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Sep2016 vid: 26 iid: 9 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 117171311 117171311 NLM26803507 117171311 10.1007/s00330-015-4157-6 NLM26803507 117171311 ppf: 3026 ppct: 8 formats: fmt: @attributes: type: P tig: atl: Reconstruction of paediatric organ doses from axial CT scans performed in the 1990s - range of doses as input to uncertainty estimates. aug: au: Olerud, Hilde Toft, Benthe Flatabø, Silje Jahnen, Andreas Lee, Choonsik Thierry-Chef, Isabelle Olerud, Hilde M affil: Gjøvik University College , Teknologivn. 22 NO- 2815 Gjøvik Norway sug: subj: Tomography, X-Ray Computed Methods Radiation Dosage Pediatrics Statistics and Numerical Data Phantoms, Imaging Models, Theoretical Uncertainty Child Child, Preschool Brain Infant, Newborn Adult Breast Adolescence Tomography, X-Ray Computed Statistics and Numerical Data Bone Marrow Radiometry Methods Norway Male Female Infant Human Child: 6-12 years Child, Preschool: 2-5 years Infant, Newborn: birth-1 month Adult: 19-44 years Adolescent: 13-18 years Infant: 1-23 months Male Female ab: Objective: To assess the range of doses in paediatric CT scans conducted in the 1990s in Norway as input to an international epidemiology study: the EPI-CT study, http://epi-ct.iarc.fr/ .Methods: National Cancer Institute dosimetry system for Computed Tomography (NCICT) program based on pre-calculated organ dose conversion coefficients was used to convert CT Dose Index to organ doses in paediatric CT in the 1990s. Protocols reported from local hospitals in a previous Norwegian CT survey were used as input, presuming these were used without optimization for paediatric patients.Results: Large variations in doses between different scanner models and local scan parameter settings are demonstrated. Small children will receive a factor of 2-3 times higher doses compared with adults if the protocols are not optimized for them. For common CT examinations, the doses to the active bone marrow, breast tissue and brain may have exceeded 30 mGy, 60 mGy and 100 mGy respectively, for the youngest children in the 1990s.Conclusions: The doses children received from non-optimised CT examinations during the 1990s are of such magnitude that they may provide statistically significant effects in the EPI-CT study, but probably do not reflect current practice.Key Points: • Some organ doses from paediatric CT in the 1990s may have exceeded 100 mGy. • Small children may have received doses 2-3 times higher compared with adults. • Different scanner models varied by a factor of 2-3 in dose to patients. • Different local scan parameter settings gave dose variations of a factor 2-3. • Modern CTs and age-adjusted protocols will give much lower paediatric doses. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
|---|