dc.contributor.author | Tonkopi, Elena | |
dc.contributor.author | Tetteh, Mercy Afadzi | |
dc.contributor.author | Gunn, Catherine | |
dc.contributor.author | Ashraf, Haseem | |
dc.contributor.author | Rusten, Sigrid Lia | |
dc.contributor.author | Safi, Perkhah | |
dc.contributor.author | Tinsoe, Nora Suu | |
dc.contributor.author | Colford, Kylie | |
dc.contributor.author | Ouellet, Olivia | |
dc.contributor.author | Naimi, Salma | |
dc.contributor.author | Johansen, Safora | |
dc.date.accessioned | 2024-08-07T08:49:48Z | |
dc.date.available | 2024-08-07T08:49:48Z | |
dc.date.created | 2024-04-30T09:32:32Z | |
dc.date.issued | 2024 | |
dc.identifier.issn | 2058-4601 | |
dc.identifier.uri | https://hdl.handle.net/11250/3145012 | |
dc.description.abstract | Background: Low-dose CT (LDCT) chest protocols have widespread clinical applications for many indications; as a result, there is a need for protocol assessment prior to standardization. Dalhousie University and Oslo Metropolitan University have a formally established cooperative relationship.
Purpose: The purpose is to assess radiation dose and image quality for LDCT chest protocols in seven different hospital locations in Norway and Canada.
Material and methods: Retrospective dosimetry data, volumetric CT dose index (CTDIvol), and dose length product (DLP) from 240 average-sized patients as well as CT protocol parameters were included in the survey. Effective dose (ED) and size-specific dose estimate (SSDE) were calculated for each examination. For a quantitative image quality analysis, noise, CT number, and signal-to-noise ratio (SNR) were determined for three regions in the chest. The contrast-to-noise ratio (CNR) was calculated for lung parenchyma in comparison to the subcutaneous fat. Differences in dose and image quality were evaluated by a single-factor ANOVA test. A two-sample t-test was performed to determine differences in means between individual scanners.
Results: The ANOVA test revealed significant differences (p < .05) in dose values for all scanners, including identical scanner models. Statistically significant differences (p < .05) were determined in mean values of the SNR distributions between the scanners in all three measured regions in the chest, as well as the CNR values.
Conclusion: The observed variations in dose and image quality measurements, even within the same hospitals and between identical scanner models, indicate a potential for protocol optimization in the involved hospitals in both countries. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | SAGE Publications | en_US |
dc.relation.ispartofseries | Acta Radiologica Open; | |
dc.rights | Navngivelse-Ikkekommersiell 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/4.0/deed.no | * |
dc.title | A multi-institutional assessment of low-dose protocols in chest computed tomography: Dose and image quality | en_US |
dc.type | Peer reviewed | en_US |
dc.type | Journal article | en_US |
dc.description.version | publishedVersion | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.doi | 10.1177/20584601241228220 | |
dc.identifier.doi | http://dx.doi.org/10.1177/20584601241228220 | |
dc.identifier.cristin | 2265564 | |
dc.source.journal | Acta Radiologica Open | en_US |
dc.source.volume | 13 | en_US |
dc.source.issue | 1 | en_US |