A new CT grading system for hip osteoarthritis

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Presentation transcript:

A new CT grading system for hip osteoarthritis T.D. Turmezei, A. Fotiadou, D.J. Lomas, M.A. Hopper, K.E.S. Poole Osteoarthritis and Cartilage Volume 22, Issue 10, Pages 1360-1366 (October 2014) DOI: 10.1016/j.joca.2014.03.008 Copyright © 2014 Osteoarthritis Research Society International Terms and Conditions

Fig. 1 DRR process from helically acquired CT data using OsiriX. (a) Axial mean intensity projection reformat of the original data showing the sagittal (orange) plane used to align along the AP axis of the pubic symphysis and the coronal (cyan) reformat plane with outer lines marking the limits of the reconstructed slab just beyond the anterior and posterior hip joint margins. (b) Coronal mean intensity projection slab (usually 6–8 cm in depth) showing the DRR used for minimum JSW measurement and K&L grading (window level 200; window width 700; magnification up to 200%). Osteoarthritis and Cartilage 2014 22, 1360-1366DOI: (10.1016/j.joca.2014.03.008) Copyright © 2014 Osteoarthritis Research Society International Terms and Conditions

Fig. 2 Bland–Altman plots for intra- and inter-observer minimum JSW measurement. Osteoarthritis and Cartilage 2014 22, 1360-1366DOI: (10.1016/j.joca.2014.03.008) Copyright © 2014 Osteoarthritis Research Society International Terms and Conditions

Fig. 3 ROC analysis graphs for (a) CT composite score and (b) CT osteophyte score comparing reviewer performance. Osteoarthritis and Cartilage 2014 22, 1360-1366DOI: (10.1016/j.joca.2014.03.008) Copyright © 2014 Osteoarthritis Research Society International Terms and Conditions

SI Fig. 1 Scoresheet for assessing bony features of hip osteoarthritis: osteophytes, subchondral cysts and JSW. Crosshatched areas represent an anatomically irrelevant site (e.g., the femoral neck medulla and non-representative regions of the hip joint space). Dark grey sectors represent those excluded from severity mapping analysis. The reviewer is asked to record if there is bony deformity of the femoral head and can leave additional comment in the ‘notes’ box. The small inset figure of the acetabulum with each region assigned a different colour is a reminder of the seven distinct joint space zones. See Turmezei et al.35 for a full description of scoresheet use. Osteoarthritis and Cartilage 2014 22, 1360-1366DOI: (10.1016/j.joca.2014.03.008) Copyright © 2014 Osteoarthritis Research Society International Terms and Conditions

SI Fig. 2 Chart showing the breakdown of CT composite score from the 60 reproducibility study hips (TT assessment). Osteoarthritis and Cartilage 2014 22, 1360-1366DOI: (10.1016/j.joca.2014.03.008) Copyright © 2014 Osteoarthritis Research Society International Terms and Conditions

SI Fig. 3 Chart showing the breakdown of CT grade from the 60 reproducibility study hips (TT assessment). Osteoarthritis and Cartilage 2014 22, 1360-1366DOI: (10.1016/j.joca.2014.03.008) Copyright © 2014 Osteoarthritis Research Society International Terms and Conditions

SI Fig. 4 Chart showing the breakdown of K&L grade from the 60 reproducibility study hips (TT assessment). Osteoarthritis and Cartilage 2014 22, 1360-1366DOI: (10.1016/j.joca.2014.03.008) Copyright © 2014 Osteoarthritis Research Society International Terms and Conditions