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Assessment of effective dose in paediatric CT examinations.
Radiat Prot Dosimetry. 2011 Sep; 147(1-2):147-50.RP

Abstract

Current concerns focus on the high doses encountered in computed tomography (CT) examinations as they are extending towards younger and more radiosensitive patients. Previous work produced conversion coefficients for effective dose (E) from dose-length product (DLP) for four anatomical body regions applicable to any patient size. This work aims to update the earlier work, incorporating the new ICRP 2007 tissue-weighting factors and testing the methodology on modern scanners. For each age and body region, E was determined relative to DLP. Measurements were carried out on a 64-slice scanner to test this methodology. The conversion coefficients show exponential decrease with patient size. Conversion factors for the pelvis region are lower than before (30-40 %), those for the chest increased (by up to 25 %) whereas those for the head and abdomen remained fairly similar. Application of the coefficients to modern scanners verified the results, so that this methodology can be applied for a wide range of paediatric CT examinations.

Authors+Show Affiliations

Regional Medical Physics Department, Freeman Hospital, Freeman Road, Newcastle upon Tyne NE7 7DN, UK. eftychia.dougeni@nuth.nhs.ukNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

21743080

Citation

Dougeni, E, et al. "Assessment of Effective Dose in Paediatric CT Examinations." Radiation Protection Dosimetry, vol. 147, no. 1-2, 2011, pp. 147-50.
Dougeni E, Chapple CL, Willis J, et al. Assessment of effective dose in paediatric CT examinations. Radiat Prot Dosimetry. 2011;147(1-2):147-50.
Dougeni, E., Chapple, C. L., Willis, J., & Panayiotakis, G. (2011). Assessment of effective dose in paediatric CT examinations. Radiation Protection Dosimetry, 147(1-2), 147-50. https://doi.org/10.1093/rpd/ncr288
Dougeni E, et al. Assessment of Effective Dose in Paediatric CT Examinations. Radiat Prot Dosimetry. 2011;147(1-2):147-50. PubMed PMID: 21743080.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Assessment of effective dose in paediatric CT examinations. AU - Dougeni,E, AU - Chapple,C L, AU - Willis,J, AU - Panayiotakis,G, Y1 - 2011/07/09/ PY - 2011/7/12/entrez PY - 2011/7/12/pubmed PY - 2012/3/1/medline SP - 147 EP - 50 JF - Radiation protection dosimetry JO - Radiat Prot Dosimetry VL - 147 IS - 1-2 N2 - Current concerns focus on the high doses encountered in computed tomography (CT) examinations as they are extending towards younger and more radiosensitive patients. Previous work produced conversion coefficients for effective dose (E) from dose-length product (DLP) for four anatomical body regions applicable to any patient size. This work aims to update the earlier work, incorporating the new ICRP 2007 tissue-weighting factors and testing the methodology on modern scanners. For each age and body region, E was determined relative to DLP. Measurements were carried out on a 64-slice scanner to test this methodology. The conversion coefficients show exponential decrease with patient size. Conversion factors for the pelvis region are lower than before (30-40 %), those for the chest increased (by up to 25 %) whereas those for the head and abdomen remained fairly similar. Application of the coefficients to modern scanners verified the results, so that this methodology can be applied for a wide range of paediatric CT examinations. SN - 1742-3406 UR - https://www.unboundmedicine.com/medline/citation/21743080/Assessment_of_effective_dose_in_paediatric_CT_examinations_ L2 - https://academic.oup.com/rpd/article-lookup/doi/10.1093/rpd/ncr288 DB - PRIME DP - Unbound Medicine ER -