CT colonography: size reduction of submerged colorectal polyps due to electronic cleansing and CT-window settings.
Objectives: To assess whether electronic cleansing (EC) of tagged residue and different computed tomography (CT) windows influence the size of colorectal polyps in CT colonography (CTC).Methods: A database of 894 colonoscopy-validated CTC datasets of a low-prevalence cohort was retrospectively revie...
| Publicado en: | European Radiology Vol. 28; no. 11; pp. 4766 - 4775 |
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| Autores principales: | , , , , , , , , , , , , , , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Nov2018
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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=132188026&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 132188026 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09387994 NPH jtl: European Radiology issn: 09387994 maglogo: N pubinfo: dt: Nov2018 vid: 28 iid: 11 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 132188026 132188026 NLM29761359 10.1007/s00330-018-5416-0 NLM29761359 132188026 ppf: 4766 ppct: 9 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: CT colonography: size reduction of submerged colorectal polyps due to electronic cleansing and CT-window settings. aug: au: Bräuer, Christian Lefere, Philippe Gryspeerdt, Stefaan Ringl, Helmut Al-Mukhtar, Ali Apfaltrer, Paul Berzaczy, Dominik Füger, Barbara Furtner, Julia Müller-Mang, Christina Pones, Matthias Scharitzer, Martina Woitek, Ramona Graser, Anno Weber, Michael Mang, Thomas affil: Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria sug: subj: Colonic Polyps Colonography, Computed Tomographic Methods Image Processing, Computer Assisted Methods Analysis of Variance Retrospective Design Female Algorithms Middle Age Sensitivity and Specificity Aged Male Colonography, Computed Tomographic Standards Weights and Measures Middle Aged: 45-64 years Aged: 65+ years Female Male ab: Objectives: To assess whether electronic cleansing (EC) of tagged residue and different computed tomography (CT) windows influence the size of colorectal polyps in CT colonography (CTC).Methods: A database of 894 colonoscopy-validated CTC datasets of a low-prevalence cohort was retrospectively reviewed to identify patients with polyps ≥6 mm that were entirely submerged in tagged residue. Ten radiologists independently measured the largest diameter of each polyp, two-dimensionally, before and after EC in colon, bone, and soft-tissue-windows, in randomised order. Differences in size and polyp count before and after EC were calculated for size categories ≥6 mm and ≥10 mm. Statistical testing involved 95% confidence interval, intraclass correlation and mixed-model ANOVA.Results: Thirty-seven patients with 48 polyps were included. Mean polyp size before EC was 9.8 mm in colon, 9.9 mm in bone and 8.2 mm in soft-tissue windows. After EC, the mean polyp size decreased significantly to 9.4 mm in colon, 9.1 mm in bone and 7.1 mm in soft-tissue windows. Compared to unsubtracted colon windows, EC, performed in colon, bone and soft-tissue windows, led to a shift of 6 (12,5%), 10 (20.8%) and 25 (52.1%) polyps ≥6 mm into the next smaller size category, thus affecting patient risk stratification.Conclusions: EC and narrow CT windows significantly reduce the size of polyps submerged in tagged residue. Polyp measurements should be performed in unsubtracted colon windows.Key Points: • EC significantly reduces the size of polyps submerged in tagged residue. • Abdominal CT-window settings significantly underestimate 2D sizes of submerged polyps. • Size reduction in EC is significantly greater in narrow than wide windows. • Underestimation of polyp size due to EC may lead to inadequate treatment. • Polyp measurements should be performed in unsubtracted images using a colon window. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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