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Polyp measurement based on CT colonography and colonoscopy: variability and systematic differences.

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Title: Polyp measurement based on CT colonography and colonoscopy: variability and systematic differences.
Authors: de Vries AH (AUTHOR), Bipat S (AUTHOR), Dekker E (AUTHOR), Liedenbaum MH (AUTHOR), Florie J (AUTHOR), Fockens P (AUTHOR), van der Kraan R (AUTHOR), Mathus-Vliegen EM (AUTHOR), Reitsma JB (AUTHOR), Truyen R (AUTHOR), Vos FM (AUTHOR), Zwinderman AH (AUTHOR), Stoker J (AUTHOR), de Vries, Ayso H1 (AUTHOR), Bipat, Shandra (AUTHOR), Dekker, Evelien (AUTHOR), Liedenbaum, Marjolein H (AUTHOR), Florie, Jasper (AUTHOR), Fockens, Paul (AUTHOR), van der Kraan, Roel (AUTHOR)
Source: European Radiology. Jun2010, Vol. 20 Issue 6, p1404-1413. 10p.
Abstract: Objective: To assess the variability and systematic differences in polyp measurements on optical colonoscopy and CT colonography.Materials: Gastroenterologists measured 51 polyps by visual estimation, forceps comparison and linear probe. CT colonography observers randomly assessed polyp size two-dimensionally (abdominal and intermediate window) and three-dimensionally (manually and semi-automatically). Linear mixed models were used to assess the variability and systematic differences between CT colonography and optical colonoscopy techniques.Results: The variability of forceps and linear probe measurements was comparable and both showed less variability than measurement by visual assessment. Measurements by linear probe were 0.7 mm smaller than measurements by visual assessment or by forceps. The variability of all CT colonography techniques was lower than for measurements by forceps or visual assessment and sometimes lower (only 2D intermediate window and manual 3D) compared with measurements by linear probe. All CT colonography measurements judged polyps to be larger than optical colonoscopy, with differences ranging from 0.7 to 2.3 mm.Conclusion: A linear probe does not reduce the measurement variability of endoscopists compared with the forceps. Measurement differences between observers on CT colonography were usually smaller than at optical colonoscopy. Polyps appeared larger when using various CT colonography techniques than when measured during optical colonoscopy. [ABSTRACT FROM AUTHOR]
Copyright of European Radiology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Polyp measurement based on CT colonography and colonoscopy: variability and systematic differences.
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  Data: <searchLink fieldCode="AR" term="%22de+Vries+AH%22">de Vries AH</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bipat+S%22">Bipat S</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dekker+E%22">Dekker E</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liedenbaum+MH%22">Liedenbaum MH</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Florie+J%22">Florie J</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fockens+P%22">Fockens P</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22van+der+Kraan+R%22">van der Kraan R</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mathus-Vliegen+EM%22">Mathus-Vliegen EM</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Reitsma+JB%22">Reitsma JB</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Truyen+R%22">Truyen R</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vos+FM%22">Vos FM</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zwinderman+AH%22">Zwinderman AH</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Stoker+J%22">Stoker J</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22de+Vries%2C+Ayso+H%22">de Vries, Ayso H</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bipat%2C+Shandra%22">Bipat, Shandra</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dekker%2C+Evelien%22">Dekker, Evelien</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liedenbaum%2C+Marjolein+H%22">Liedenbaum, Marjolein H</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Florie%2C+Jasper%22">Florie, Jasper</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fockens%2C+Paul%22">Fockens, Paul</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22van+der+Kraan%2C+Roel%22">van der Kraan, Roel</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22European+Radiology%22">European Radiology</searchLink>. Jun2010, Vol. 20 Issue 6, p1404-1413. 10p.
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  Data: <bold>Objective: </bold>To assess the variability and systematic differences in polyp measurements on optical colonoscopy and CT colonography.<bold>Materials: </bold>Gastroenterologists measured 51 polyps by visual estimation, forceps comparison and linear probe. CT colonography observers randomly assessed polyp size two-dimensionally (abdominal and intermediate window) and three-dimensionally (manually and semi-automatically). Linear mixed models were used to assess the variability and systematic differences between CT colonography and optical colonoscopy techniques.<bold>Results: </bold>The variability of forceps and linear probe measurements was comparable and both showed less variability than measurement by visual assessment. Measurements by linear probe were 0.7 mm smaller than measurements by visual assessment or by forceps. The variability of all CT colonography techniques was lower than for measurements by forceps or visual assessment and sometimes lower (only 2D intermediate window and manual 3D) compared with measurements by linear probe. All CT colonography measurements judged polyps to be larger than optical colonoscopy, with differences ranging from 0.7 to 2.3 mm.<bold>Conclusion: </bold>A linear probe does not reduce the measurement variability of endoscopists compared with the forceps. Measurement differences between observers on CT colonography were usually smaller than at optical colonoscopy. Polyps appeared larger when using various CT colonography techniques than when measured during optical colonoscopy. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of European Radiology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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