West African Journal of Radiology

ORIGINAL ARTICLE
Year
: 2016  |  Volume : 23  |  Issue : 2  |  Page : 113--117

Head computed tomography: Dose output and relationship with anthropotechnical parameters


Thomas Adejoh1, Christian Chukwuemeka Nzotta2 
1 Department of Radiology, Nnamdi Azikiwe University Teaching Hospital, Nnewi Campus, Nnewi, Anambra State, Nigeria
2 Department of Radiography and Radiological Sciences, College of Health Sciences, Nnamdi Azikiwe University, Nnewi Campus, Nnewi, Anambra State, Nigeria

Correspondence Address:
Thomas Adejoh
Department of Radiology, Nnamdi Azikiwe University Teaching Hospital, Nnewi, Anambra State
Nigeria

Background: The number of computed tomography (CT) centers and examinations in Nigeria has shown a steady increase. This will increase the collective dose and may potentially result in an increased incidence of cancer, hereditary diseases, and the possibility of mild deterministic effects. Objective: To determine radiation dose output and its relationship with anthropotechnical parameters. Methodology: A retrospective analyses of digital CT files. Effective dose was derived from the dose-length product and factor for examination of head CT (0.0023 mSv/mGy-cm). SPSS version 20.0 (SPSS Inc., Chicago, IL, USA) was used to analyze the data. Results: Files of 43 male and 42 female (n = 85) adult patients were analyzed. The mean (and 75 th percentile) of the CT dose index (CTDI), dose-length product (DLP), and effective dose in noncontrast examinations were 48 (59) mGy, 874 (1301) mGy-cm, and 1.8 (2.7) mSv, respectively. Contrast examinations yielded 54 (61) mGy, 1476 (2044) mGy-cm, and 3.1 (4.3) mSv, respectively. DLP showed a weak relationship with BPD (r = −0.220), age (r = 0.211), cephalic index (r = −0.186), height (r = 0.158), and gantry tilt (r = 0.154). There was no relationship with weight (r = 0.076), range (r = −0.073), occipitofrontal diameter (r = 0.037), and body mass index (r = −0.018). The correlations were neither statistically nor clinically significant. Conclusion: The CTDI is comparable with local values while the DLP is lower by a range of 5-31% but higher than foreign values by a range of 19-35%. Further optimization of CT radiation dose should be explored to eliminate the gulf between local and foreign dose outputs.


How to cite this article:
Adejoh T, Nzotta CC. Head computed tomography: Dose output and relationship with anthropotechnical parameters.West Afr J Radiol 2016;23:113-117


How to cite this URL:
Adejoh T, Nzotta CC. Head computed tomography: Dose output and relationship with anthropotechnical parameters. West Afr J Radiol [serial online] 2016 [cited 2022 May 21 ];23:113-117
Available from: https://www.wajradiology.org/article.asp?issn=1115-3474;year=2016;volume=23;issue=2;spage=113;epage=117;aulast=Adejoh;type=0