{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T23:02:36Z","timestamp":1790377356884,"version":"4.1.0"},"reference-count":24,"publisher":"Georg Thieme Verlag KG","issue":"10","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Rofo"],"published-print":{"date-parts":[[2026,10]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Computed tomography (CT) plays a central role in oncologic imaging, yet repeated examinations contribute substantially to cumulative radiation exposure. This study aimed to evaluate inter- and intra-individual radiation dose variability in chest and abdominal CT and the impact of CT device model and protocol standardization.<\/jats:p>\n                  <jats:p>In this retrospective single-center study, 42441 CT scans from 4986 adult oncologic patients were analyzed. Dose metrics (CTDIvol, DLP, SSDE, effective dose) were extracted using automated dose monitoring. Inter- and intra-individual radiation dose variability was assessed across four CT device models and various protocol subtypes. Intra-individual radiation dose variability was calculated relative to the lowest dose per patient and compared across CT devices and protocol subtypes.<\/jats:p>\n                  <jats:p>Radiation dose varied substantially between devices, with CTDIvol differences of up to 2.4-fold in chest CT (2.98\u20137.26 mGy) and 1.7-fold in abdominal CT (5.26\u20138.77 mGy). The median intra-individual radiation dose variability was 93.7% (IQR 19.8\u2013142.0%) in non-contrast chest CT, 66.3% (31.1\u2013105.4%) in contrast-enhanced chest CT, 19.8% (11.8\u201332.3%) in non-contrast abdominal CT, and 28.2% (16.6\u201341.0%) in contrast-enhanced abdominal CT. When consecutive scans were performed on the same scanner, intra-individual radiation dose variability decreased to 14.7% (IQR 8.1\u201333.1%), 18.1% (9.5\u201331.3%), 11.7% (7.8\u201319.8%), and 15.3% (8.3\u201324.7%), respectively, indicating substantial device-specific effects.<\/jats:p>\n                  <jats:p>Significant radiation dose variability persists in oncologic CT, both between and within patients, despite the use of standardized protocols. Device-adapted dose management and consistent device use may improve dose consistency, support optimization in oncologic imaging, and reduce radiation exposure.<\/jats:p>","DOI":"10.1055\/a-2786-2534","type":"journal-article","created":{"date-parts":[[2026,1,31]],"date-time":"2026-01-31T00:05:22Z","timestamp":1769817922000},"page":"1330-1340","source":"Crossref","is-referenced-by-count":0,"title":["Inter- and intra-individual radiation dose variability in oncologic chest and abdominal computed tomography"],"prefix":"10.1055","volume":"198","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-6903-1867","authenticated-orcid":false,"given":"Arian Felix","family":"Moradians","sequence":"additional","affiliation":[{"name":"University Hospital Essen, NRW, Germany","place":["Essen"],"department":["Institute of Diagnostic and Interventional Radiology and Neuroradiology"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel","family":"Rosok","sequence":"additional","affiliation":[{"name":"University Hospital Essen, NRW, Germany","place":["Essen"],"department":["Institute of Diagnostic and Interventional Radiology and Neuroradiology"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Raya","family":"Serger","sequence":"additional","affiliation":[{"name":"University Hospital Essen, NRW, Germany","place":["Essen"],"department":["Institute of Diagnostic and Interventional Radiology and Neuroradiology"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7850-3589","authenticated-orcid":false,"given":"Laura Valentina","family":"Kl\u00fcner","sequence":"additional","affiliation":[{"name":"University Hospital Essen, NRW, Germany","place":["Essen"],"department":["Institute of Diagnostic and Interventional Radiology and Neuroradiology"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcel","family":"Drews","sequence":"additional","affiliation":[{"name":"University Hospital Essen, NRW, Germany","place":["Essen"],"department":["Institute of Diagnostic and Interventional Radiology and Neuroradiology"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Florian","family":"Behr","sequence":"additional","affiliation":[{"name":"University Hospital Bonn, Germany","place":["Bonn"],"department":["Department of Diagnostic and Interventional Radiology"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luca","family":"Salh\u00f6fer","sequence":"additional","affiliation":[{"name":"University Hospital Essen, NRW, Germany","place":["Essen"],"department":["Institute of Diagnostic and Interventional Radiology and Neuroradiology"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9585-9787","authenticated-orcid":false,"given":"Denise","family":"Bos","sequence":"additional","affiliation":[{"name":"University Hospital Essen, NRW, Germany","place":["Essen"],"department":["Institute of Diagnostic and Interventional Radiology and Neuroradiology"]},{"name":"University Hospital Zurich Institute of Diagnostic Radiology, Switzerland","place":["Z\u00fcrich"],"department":["Institute of Diagnostic Radiology"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Forsting","sequence":"additional","affiliation":[{"name":"University Hospital Essen, NRW, Germany","place":["Essen"],"department":["Institute of Diagnostic and Interventional Radiology and Neuroradiology"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Johannes","family":"Haubold","sequence":"additional","affiliation":[{"name":"University Hospital Essen, NRW, Germany","place":["Essen"],"department":["Institute of Diagnostic and Interventional Radiology and Neuroradiology"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7455-8590","authenticated-orcid":false,"given":"Marcel Klaus","family":"Opitz","sequence":"additional","affiliation":[{"name":"University Hospital Essen, NRW, Germany","place":["Essen"],"department":["Institute of Diagnostic and Interventional Radiology and Neuroradiology"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2997-0740","authenticated-orcid":false,"given":"Sebastian","family":"Zensen","sequence":"additional","affiliation":[{"name":"University Hospital Essen, NRW, Germany","place":["Essen"],"department":["Institute of Diagnostic and Interventional Radiology and 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