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Radiation dose evaluation in 64-slice CT examinations with adult and paediatric anthropomorphic phantoms.
Br J Radiol 2009; 82(984):1010-8BJ

Abstract

The objective of this study was to evaluate the organ dose and effective dose to patients undergoing routine adult and paediatric CT examinations with 64-slice CT scanners and to compare the doses with those from 4-, 8- and 16-multislice CT scanners. Patient doses were measured with small (<7 mm wide) silicon photodiode dosemeters (34 in total), which were implanted at various tissue and organ positions within adult and 6-year-old child anthropomorphic phantoms. Output signals from photodiode dosemeters were read on a personal computer, from which organ and effective doses were computed. For the adult phantom, organ doses (for organs within the scan range) and effective doses were 8-35 mGy and 7-18 mSv, respectively, for chest CT, and 12-33 mGy and 10-21 mSv, respectively, for abdominopelvic CT. For the paediatric phantom, organ and effective doses were 4-17 mGy and 3-7 mSv, respectively, for chest CT, and 5-14 mGy and 3-9 mSv, respectively, for abdominopelvic CT. Doses to organs at the boundaries of the scan length were higher for 64-slice CT scanners using large beam widths and/or a large pitch because of the larger extent of over-ranging. The CT dose index (CTDI(vol)), dose-length product (DLP) and the effective dose values using 64-slice CT for the adult and paediatric phantoms were the same as those obtained using 4-, 8- and 16-slice CT. Conversion factors of DLP to the effective dose by International Commission on Radiological Protection 103 were 0.024 mSvmGy(-1)cm(-1) and 0.019 mSvmGy(-1)cm(-1) for adult chest and abdominopelvic CT scans, respectively.

Authors+Show Affiliations

National Institute of Radiological Sciences, Anagawa, Inage-ku, Chiba, Japan. j070205d@mbox.nagoya-u.ac.jpNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

19934069

Citation

Fujii, K, et al. "Radiation Dose Evaluation in 64-slice CT Examinations With Adult and Paediatric Anthropomorphic Phantoms." The British Journal of Radiology, vol. 82, no. 984, 2009, pp. 1010-8.
Fujii K, Aoyama T, Yamauchi-Kawaura C, et al. Radiation dose evaluation in 64-slice CT examinations with adult and paediatric anthropomorphic phantoms. Br J Radiol. 2009;82(984):1010-8.
Fujii, K., Aoyama, T., Yamauchi-Kawaura, C., Koyama, S., Yamauchi, M., Ko, S., ... Nishizawa, K. (2009). Radiation dose evaluation in 64-slice CT examinations with adult and paediatric anthropomorphic phantoms. The British Journal of Radiology, 82(984), pp. 1010-8. doi:10.1259/bjr/13320880.
Fujii K, et al. Radiation Dose Evaluation in 64-slice CT Examinations With Adult and Paediatric Anthropomorphic Phantoms. Br J Radiol. 2009;82(984):1010-8. PubMed PMID: 19934069.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Radiation dose evaluation in 64-slice CT examinations with adult and paediatric anthropomorphic phantoms. AU - Fujii,K, AU - Aoyama,T, AU - Yamauchi-Kawaura,C, AU - Koyama,S, AU - Yamauchi,M, AU - Ko,S, AU - Akahane,K, AU - Nishizawa,K, PY - 2009/11/26/entrez PY - 2009/11/26/pubmed PY - 2010/1/26/medline SP - 1010 EP - 8 JF - The British journal of radiology JO - Br J Radiol VL - 82 IS - 984 N2 - The objective of this study was to evaluate the organ dose and effective dose to patients undergoing routine adult and paediatric CT examinations with 64-slice CT scanners and to compare the doses with those from 4-, 8- and 16-multislice CT scanners. Patient doses were measured with small (<7 mm wide) silicon photodiode dosemeters (34 in total), which were implanted at various tissue and organ positions within adult and 6-year-old child anthropomorphic phantoms. Output signals from photodiode dosemeters were read on a personal computer, from which organ and effective doses were computed. For the adult phantom, organ doses (for organs within the scan range) and effective doses were 8-35 mGy and 7-18 mSv, respectively, for chest CT, and 12-33 mGy and 10-21 mSv, respectively, for abdominopelvic CT. For the paediatric phantom, organ and effective doses were 4-17 mGy and 3-7 mSv, respectively, for chest CT, and 5-14 mGy and 3-9 mSv, respectively, for abdominopelvic CT. Doses to organs at the boundaries of the scan length were higher for 64-slice CT scanners using large beam widths and/or a large pitch because of the larger extent of over-ranging. The CT dose index (CTDI(vol)), dose-length product (DLP) and the effective dose values using 64-slice CT for the adult and paediatric phantoms were the same as those obtained using 4-, 8- and 16-slice CT. Conversion factors of DLP to the effective dose by International Commission on Radiological Protection 103 were 0.024 mSvmGy(-1)cm(-1) and 0.019 mSvmGy(-1)cm(-1) for adult chest and abdominopelvic CT scans, respectively. SN - 1748-880X UR - https://www.unboundmedicine.com/medline/citation/19934069/Radiation_dose_evaluation_in_64_slice_CT_examinations_with_adult_and_paediatric_anthropomorphic_phantoms_ L2 - http://www.birpublications.org/doi/full/10.1259/bjr/13320880?url_ver=Z39.88-2003&amp;rfr_id=ori:rid:crossref.org&amp;rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -