Statistical analysis for obtaining optimum number of CT scanners in patient dose surveys for determining national diagnostic reference levels.
Objectives: To statistically determine an 'optimum number of CT scanners' for obtaining 'diagnostic reference levels' (DRLs) in CT examinations as close as possible to 'ideal DRLs' when all available CT scanners are considered.Methods: First, six 'ideal DRLs' (CTDIVol and DLP) were determined for he...
| Publicado en: | European Radiology Vol. 29; no. 1; pp. 168 - 176 |
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| Autores principales: | , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Jan2019
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| 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=133531102&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 133531102 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Jan2019 vid: 29 iid: 1 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 133531102 133531102 NLM29955947 10.1007/s00330-018-5547-3 NLM29955947 133531102 ppf: 168 ppct: 8 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Statistical analysis for obtaining optimum number of CT scanners in patient dose surveys for determining national diagnostic reference levels. aug: au: Sohrabi, Mehdi Parsi, Masoumeh Hariri Tabrizi, Sanaz affil: Health Physics and Dosimetry Research Laboratory, Department of Energy Engineering and Physics, Amirkabir University of Technology, Tehran, Iran sug: subj: Equipment and Supplies Statistics and Numerical Data Radiation Dosage Tomography, X-Ray Computed Statistics and Numerical Data Tomography, X-Ray Computed Methods Tomography, X-Ray Computed Equipment and Supplies Pelvis Radiologic Health Abdomen Reference Values Iran Radiometry Methods Radiologic Health Standards Thorax Head Radiometry Standards Equipment and Supplies Standards ab: Objectives: To statistically determine an 'optimum number of CT scanners' for obtaining 'diagnostic reference levels' (DRLs) in CT examinations as close as possible to 'ideal DRLs' when all available CT scanners are considered.Methods: First, six 'ideal DRLs' (CTDIVol and DLP) were determined for head, chest and abdomen/pelvis examinations by using patient-dose survey data of 100 CT scanners of different models in Tehran. Then, a 'random sampling method' was applied to different percent fractions of patient dose data of 100 CT scanners. The percent differences (PD) of the DRLs obtained from 'ideal DRLs' and their coefficients of variation (CVs) were calculated. The 'optimum number of CT scanners' determined met those of 'ideal DRL' criteria; i.e. precision (CV ≤ 10%) and accuracy (PD ≤ 10%).Results: 'Optimum number of CT scanners' for determining DRLs as close as possible to 'ideal DRLs', fulfilling the stated criteria, is 43 instead of using 100.Conclusion: 'Optimum number of CT scanners' for obtaining DRLs as close as possible to 'ideal DRLs' was determined. This optimum number can be effectively applied in patient-dose survey situations with limited resources in a time- and cost-effective manner.Key Points: • Ideal DRLs were determined by a CT patient-dose survey applied to available scanners. • 'Optimum number of CT scanners' statistically determined for DRLs is 43%. • Optimum number can be used for DRLs as if 'ideal DRLs' were determined by all scanners. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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