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Reduced-dose abdominopelvic CT using hybrid iterative reconstruction in suspected left-sided colonic diverticulitis.

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Title: Reduced-dose abdominopelvic CT using hybrid iterative reconstruction in suspected left-sided colonic diverticulitis.
Authors: Laqmani, Azien1 a.laqmani@uke.de, Veldhoen, Simon2, Dulz, Simon1, Derlin, Thorsten3, Behzadi, Cyrus1, Schmidt-Holtz, Jakob1, Wassenberg, Felicia1, Sehner, Susanne4, Nagel, Hans-Dieter5, Adam, Gerhard1, Regier, Marc1
Source: European Radiology. Jan2016, Vol. 26 Issue 1, p216-224. 9p.
Subjects: Diverticulitis, Computed tomography, Radiation doses, Signal-to-noise ratio, Confidence intervals, Body mass index, Algorithms, Diagnostic imaging, Computers in medicine, Colon diverticulum
Abstract: Objectives: To assess the effect of hybrid iterative reconstruction (HIR) and filtered back projection (FBP) on abdominopelvic CT with reduced-dose (RD-APCT) in the evaluation of acute left-sided colonic diverticulitis (ALCD).Methods: Twenty-five consecutive patients with suspected ALCD who underwent RD-APCT (mean CTDIvol 11.2 ± 4.2 mGy) were enrolled in this study. Raw data were reconstructed using FBP and two increasing HIR levels, L4 & L6. Two radiologists assessed image quality, image noise and reviewer confidence in interpreting findings of ALCD, including wall thickening, pericolic fat inflammation, pericolic abscess, and contained or free extraluminal air. Objective image noise (OIN) was measured.Results: OIN was reduced up to 54 % with HIR compared to FBP. Subjective image quality of HIR images was superior to FBP; subjective image noise was reduced. The detection rate of extraluminal air was higher with HIR L6. Reviewer confidence in interpreting CT findings of ALCD significantly improved with application of HIR.Conclusions: RD-APCT with HIR offers superior image quality and lower image noise compared to FBP, allowing a high level of reviewer confidence in interpreting CT findings in ALCD. HIR facilitates detection of ALCD findings that may be missed with the FBP algorithm.Key Points: HIR significantly reduces objective image noise in comparison to conventional FBP. HIR offers superior subjective image quality in comparison to conventional FBP. HIR allows reduced-dose abdominopelvic CT with acceptable image quality. Reviewer confidence in interpreting CT findings in ALCD significantly improves with HIR. [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: Reduced-dose abdominopelvic CT using hybrid iterative reconstruction in suspected left-sided colonic diverticulitis.
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  Data: <searchLink fieldCode="AR" term="%22Laqmani%2C+Azien%22">Laqmani, Azien</searchLink><relatesTo>1</relatesTo><i> a.laqmani@uke.de</i><br /><searchLink fieldCode="AR" term="%22Veldhoen%2C+Simon%22">Veldhoen, Simon</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Dulz%2C+Simon%22">Dulz, Simon</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Derlin%2C+Thorsten%22">Derlin, Thorsten</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Behzadi%2C+Cyrus%22">Behzadi, Cyrus</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Schmidt-Holtz%2C+Jakob%22">Schmidt-Holtz, Jakob</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Wassenberg%2C+Felicia%22">Wassenberg, Felicia</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Sehner%2C+Susanne%22">Sehner, Susanne</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Nagel%2C+Hans-Dieter%22">Nagel, Hans-Dieter</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Adam%2C+Gerhard%22">Adam, Gerhard</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Regier%2C+Marc%22">Regier, Marc</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22European+Radiology%22">European Radiology</searchLink>. Jan2016, Vol. 26 Issue 1, p216-224. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Diverticulitis%22">Diverticulitis</searchLink><br /><searchLink fieldCode="DE" term="%22Computed+tomography%22">Computed tomography</searchLink><br /><searchLink fieldCode="DE" term="%22Radiation+doses%22">Radiation doses</searchLink><br /><searchLink fieldCode="DE" term="%22Signal-to-noise+ratio%22">Signal-to-noise ratio</searchLink><br /><searchLink fieldCode="DE" term="%22Confidence+intervals%22">Confidence intervals</searchLink><br /><searchLink fieldCode="DE" term="%22Body+mass+index%22">Body mass index</searchLink><br /><searchLink fieldCode="DE" term="%22Algorithms%22">Algorithms</searchLink><br /><searchLink fieldCode="DE" term="%22Diagnostic+imaging%22">Diagnostic imaging</searchLink><br /><searchLink fieldCode="DE" term="%22Computers+in+medicine%22">Computers in medicine</searchLink><br /><searchLink fieldCode="DE" term="%22Colon+diverticulum%22">Colon diverticulum</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: <bold>Objectives: </bold>To assess the effect of hybrid iterative reconstruction (HIR) and filtered back projection (FBP) on abdominopelvic CT with reduced-dose (RD-APCT) in the evaluation of acute left-sided colonic diverticulitis (ALCD).<bold>Methods: </bold>Twenty-five consecutive patients with suspected ALCD who underwent RD-APCT (mean CTDIvol 11.2 ± 4.2 mGy) were enrolled in this study. Raw data were reconstructed using FBP and two increasing HIR levels, L4 & L6. Two radiologists assessed image quality, image noise and reviewer confidence in interpreting findings of ALCD, including wall thickening, pericolic fat inflammation, pericolic abscess, and contained or free extraluminal air. Objective image noise (OIN) was measured.<bold>Results: </bold>OIN was reduced up to 54 % with HIR compared to FBP. Subjective image quality of HIR images was superior to FBP; subjective image noise was reduced. The detection rate of extraluminal air was higher with HIR L6. Reviewer confidence in interpreting CT findings of ALCD significantly improved with application of HIR.<bold>Conclusions: </bold>RD-APCT with HIR offers superior image quality and lower image noise compared to FBP, allowing a high level of reviewer confidence in interpreting CT findings in ALCD. HIR facilitates detection of ALCD findings that may be missed with the FBP algorithm.<bold>Key Points: </bold>HIR significantly reduces objective image noise in comparison to conventional FBP. HIR offers superior subjective image quality in comparison to conventional FBP. HIR allows reduced-dose abdominopelvic CT with acceptable image quality. Reviewer confidence in interpreting CT findings in ALCD significantly improves with HIR. [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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        Value: 10.1007/s00330-015-3810-4
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