Relationship Between Effective Dose, Alternative Metrics, and SSDE: Experiences with Two CT Dose-Monitoring Systems
<b>Background</b>: We assessed the frequency and causes of discrepancies in CT dose indices such as dose-length product (DLP), size-specific dose estimate (SSDE), and effective dose (ED), as calculated by CT dose-monitoring systems. Our secondary aim was to demonstrate the estimation of...
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MDPI AG
2025-06-01
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| Online Access: | https://www.mdpi.com/2075-4418/15/13/1654 |
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| author | Lilla Szatmáriné Egeresi László Urbán Zsolt Dankó Ervin Balázs Ervin Berényi Mária Marosi János Kiss Péter Bágyi Zita Képes Miklós Emri László Balkay |
| author_facet | Lilla Szatmáriné Egeresi László Urbán Zsolt Dankó Ervin Balázs Ervin Berényi Mária Marosi János Kiss Péter Bágyi Zita Képes Miklós Emri László Balkay |
| author_sort | Lilla Szatmáriné Egeresi |
| collection | DOAJ |
| description | <b>Background</b>: We assessed the frequency and causes of discrepancies in CT dose indices such as dose-length product (DLP), size-specific dose estimate (SSDE), and effective dose (ED), as calculated by CT dose-monitoring systems. Our secondary aim was to demonstrate the estimation of size-specific ED (SED) from the patients’ dose records. <b>Methods</b>: The retrospective study included dosimetric data of 79,383 consecutive CT exams performed on two CT scanners. The following dose values were recorded from both the locally developed dose-monitoring system (DMS) and a commercial dose-monitoring program (DW<sup>TM</sup>): DLP, SSDE, and ED. Only the DMS provided bodyweight-corrected effective dose (SED<sub>DMS</sub>) and the SED based on previous published data. <b>Results</b>: Without body-region-specific analysis, there were no tendentious differences between the DLP, ED, or SSDE values obtained from DW<sup>TM</sup> and DMS. However, the body region-based correlation revealed substantial differences between ED<sub>DMS</sub> and ED<sub>DW</sub>, primarily related to inadequate identification of the body. SSDE showed strong correlation to each anatomical category and CT device, except for the head region, where inadequate consideration of CT inclination was the reason for the biased SSDE<sub>DW</sub> value. Furthermore, by analyzing the SED<sub>DMS</sub>, SSDE, and SED correlations, we concluded that SED<sub>DMS</sub> is a promising figure for estimating the SED value. <b>Conclusions</b>: SED provides suitable supplementary size-specific dose data to SDDE and may be a preferable choice for estimating cumulative doses in routine radiological practice. |
| format | Article |
| id | doaj-art-05c057b5a69d41adb08f6d4b6c46d827 |
| institution | Kabale University |
| issn | 2075-4418 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Diagnostics |
| spelling | doaj-art-05c057b5a69d41adb08f6d4b6c46d8272025-08-20T03:28:37ZengMDPI AGDiagnostics2075-44182025-06-011513165410.3390/diagnostics15131654Relationship Between Effective Dose, Alternative Metrics, and SSDE: Experiences with Two CT Dose-Monitoring SystemsLilla Szatmáriné Egeresi0László Urbán1Zsolt Dankó2Ervin Balázs3Ervin Berényi4Mária Marosi5János Kiss6Péter Bágyi7Zita Képes8Miklós Emri9László Balkay10Division of Radiology and Imaging Science, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, HungaryDivision of Radiology and Imaging Science, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, HungaryDivision of Radiology and Imaging Science, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, HungaryDivision of Radiology and Imaging Science, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, HungaryDivision of Radiology and Imaging Science, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, HungaryDivision of Radiology and Imaging Science, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, HungaryDivision of Radiology and Imaging Science, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, HungaryIconomix Kft. Koller St. 9B 5., H-7626 Pécs, HungaryDivision of Nuclear Medicine and Translational Imaging, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, HungaryDivision of Nuclear Medicine and Translational Imaging, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, Nagyerdei St. 98, H-4032 Debrecen, HungaryDoctoral School of Molecular Medicine, Nagyerdei St. 98, H-4032 Debrecen, Hungary<b>Background</b>: We assessed the frequency and causes of discrepancies in CT dose indices such as dose-length product (DLP), size-specific dose estimate (SSDE), and effective dose (ED), as calculated by CT dose-monitoring systems. Our secondary aim was to demonstrate the estimation of size-specific ED (SED) from the patients’ dose records. <b>Methods</b>: The retrospective study included dosimetric data of 79,383 consecutive CT exams performed on two CT scanners. The following dose values were recorded from both the locally developed dose-monitoring system (DMS) and a commercial dose-monitoring program (DW<sup>TM</sup>): DLP, SSDE, and ED. Only the DMS provided bodyweight-corrected effective dose (SED<sub>DMS</sub>) and the SED based on previous published data. <b>Results</b>: Without body-region-specific analysis, there were no tendentious differences between the DLP, ED, or SSDE values obtained from DW<sup>TM</sup> and DMS. However, the body region-based correlation revealed substantial differences between ED<sub>DMS</sub> and ED<sub>DW</sub>, primarily related to inadequate identification of the body. SSDE showed strong correlation to each anatomical category and CT device, except for the head region, where inadequate consideration of CT inclination was the reason for the biased SSDE<sub>DW</sub> value. Furthermore, by analyzing the SED<sub>DMS</sub>, SSDE, and SED correlations, we concluded that SED<sub>DMS</sub> is a promising figure for estimating the SED value. <b>Conclusions</b>: SED provides suitable supplementary size-specific dose data to SDDE and may be a preferable choice for estimating cumulative doses in routine radiological practice.https://www.mdpi.com/2075-4418/15/13/1654computed tomography (CT)dose-monitoring system (DMS)effective dose (ED)size-specific dose estimate (SSDE)size-specific effective dose (SED) |
| spellingShingle | Lilla Szatmáriné Egeresi László Urbán Zsolt Dankó Ervin Balázs Ervin Berényi Mária Marosi János Kiss Péter Bágyi Zita Képes Miklós Emri László Balkay Relationship Between Effective Dose, Alternative Metrics, and SSDE: Experiences with Two CT Dose-Monitoring Systems Diagnostics computed tomography (CT) dose-monitoring system (DMS) effective dose (ED) size-specific dose estimate (SSDE) size-specific effective dose (SED) |
| title | Relationship Between Effective Dose, Alternative Metrics, and SSDE: Experiences with Two CT Dose-Monitoring Systems |
| title_full | Relationship Between Effective Dose, Alternative Metrics, and SSDE: Experiences with Two CT Dose-Monitoring Systems |
| title_fullStr | Relationship Between Effective Dose, Alternative Metrics, and SSDE: Experiences with Two CT Dose-Monitoring Systems |
| title_full_unstemmed | Relationship Between Effective Dose, Alternative Metrics, and SSDE: Experiences with Two CT Dose-Monitoring Systems |
| title_short | Relationship Between Effective Dose, Alternative Metrics, and SSDE: Experiences with Two CT Dose-Monitoring Systems |
| title_sort | relationship between effective dose alternative metrics and ssde experiences with two ct dose monitoring systems |
| topic | computed tomography (CT) dose-monitoring system (DMS) effective dose (ED) size-specific dose estimate (SSDE) size-specific effective dose (SED) |
| url | https://www.mdpi.com/2075-4418/15/13/1654 |
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