Interobserver Variation of Colonic Polyp Measurement at Computed Tomography Colonography Gurjeet Dulku, MBBS, Chandra Hewavitharana, MBBS, MD, FRANZCR,

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Interobserver Variation of Colonic Polyp Measurement at Computed Tomography Colonography Gurjeet Dulku, MBBS, Chandra Hewavitharana, MBBS, MD, FRANZCR, Tonya Halliday, MB ChB, MRCP, FRCR, FRANZCR, Duncan Ramsay, MBBS, MRCP, FRCR, FRANZCR, Richard Ho, MBBS, FRANZCR, Michael Phillips, BSc, MMedSci, Richard Mendelson, MB ChB, MRCP, FRCR, FRANZCR Canadian Association of Radiologists Journal Volume 70, Issue 1, Pages 44-51 (February 2019) DOI: 10.1016/j.carj.2018.09.007 Copyright © 2018 Canadian Association of Radiologists Terms and Conditions

Figure 1 Concordance between the computer-aided detection (CAD) and the manual measurements. Canadian Association of Radiologists Journal 2019 70, 44-51DOI: (10.1016/j.carj.2018.09.007) Copyright © 2018 Canadian Association of Radiologists Terms and Conditions

Figure 2 Means of the axial, sagittal, coronal, 3-D endoluminal, and computer-aided detection (CAD) measurements. Canadian Association of Radiologists Journal 2019 70, 44-51DOI: (10.1016/j.carj.2018.09.007) Copyright © 2018 Canadian Association of Radiologists Terms and Conditions

Figure 3 Histogram demonstrating distribution patterns of obtained measurements for 3-D endoluminal, axial, sagittal, and coronal reformats. Canadian Association of Radiologists Journal 2019 70, 44-51DOI: (10.1016/j.carj.2018.09.007) Copyright © 2018 Canadian Association of Radiologists Terms and Conditions

Figure 4 Histogram demonstrating distribution pattern of obtained measurements for computer-aided detection. Canadian Association of Radiologists Journal 2019 70, 44-51DOI: (10.1016/j.carj.2018.09.007) Copyright © 2018 Canadian Association of Radiologists Terms and Conditions

Figure 5 Images 1–4 demonstrate over-estimation of computer-aided detection (CAD) readings when compared to the largest of the manual measurements of the noted colonic polyp. (Image 1: CAD, Image 2: axial, Image 3: coronal, and Image 4: sagittal). This figure is available in colour online at http://carjonline.org/. Canadian Association of Radiologists Journal 2019 70, 44-51DOI: (10.1016/j.carj.2018.09.007) Copyright © 2018 Canadian Association of Radiologists Terms and Conditions