National survey of radiation dose and image quality in adult CT head scans in Taiwan
Lin C.-J.1,2; Mok G.S.P.3,4; Tsai M.-F.4; Tsai W.-T.4,5,8; Yang B.-H.4,6,8; Tu C.-Y.4,7,8; Wu T.-H.4
2015-06-30
Source PublicationPLoS ONE
ISSN19326203
Volume10Issue:6
Abstract

Introduction: The purpose of the present study was to evaluate the influence of different variables on radiation dose and image quality based on a national database. Materials and Methods: Taiwan's Ministry of Health and Welfare requested all radiology departments to complete a questionnaire for each of their CT scanners. Information gathered included all scanning parameters for CT head scans. For the present analysis, CT machines were divided into three subgroups: single slice CT (Group A); multi-detector CT (MDCT) with 2-64 slices (Group B); and MDCT with more than 64 slices (Group C). Correlations between computed tomography dose index (CTDI) and signal-to-noise ratio (SNR) with cumulated tube rotation number (CTW(n)) and cumulated tube rotation time (CTW(s)), and sub group analyses of CTDI and SNR across the three groups were performed. Results: CTDI values demonstrated a weak correlation (r = 0.33) with CTW(n) in Group A. SNR values demonstrated a weak negative correlation (r = -0.46) with CTW(n) in Group C. MDCT with higher slice numbers used more tube potential resulting in higher effective doses. There were both significantly lower CTDI and SNR values in helical mode than in axial mode in Group B, but not Group C. Conclusion:CTW(n) and CTW(s) did not influence radiation output. Helical mode is more often used in MDCT and results in both lower CTDI and SNR compared to axial mode in MDCT with less than 64 slices.

DOI10.1371/journal.pone.0131243
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000358151300041
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Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.School of Medicine, National Yang-Ming University, Taipei, Taiwan
2.Department of Radiology, Taipei Veterans General Hospital, Taipei, Taiwan
3.Biomedical Imaging Laboratory, Department of Electrical and Computer Engineering, Faculty of Science and Technology, University of Macau, Macau, China
4.Department of Biomedical Imaging and Radiological Sciences, National Yang Ming University, Taipei, Taiwan
5.Department of Radiation Oncology, Tzu Chi General Hospital Dalin Branch, Chiayi, Taiwan
6.Department of Nuclear Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
7.Department of Radiology, Mackay Memorial Hospital, Taipei, Taiwan
8.Association of Medical Radiation Technologists, Taipei, Taiwan
Recommended Citation
GB/T 7714
Lin C.-J.,Mok G.S.P.,Tsai M.-F.,et al. National survey of radiation dose and image quality in adult CT head scans in Taiwan[J]. PLoS ONE,2015,10(6).
APA Lin C.-J.,Mok G.S.P.,Tsai M.-F.,Tsai W.-T.,Yang B.-H.,Tu C.-Y.,&Wu T.-H..(2015).National survey of radiation dose and image quality in adult CT head scans in Taiwan.PLoS ONE,10(6).
MLA Lin C.-J.,et al."National survey of radiation dose and image quality in adult CT head scans in Taiwan".PLoS ONE 10.6(2015).
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