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Fig. 3 | BMC Medical Imaging

Fig. 3

From: Development of CT-based methods for longitudinal analyses of paranasal sinus osteitis in granulomatosis with polyangiitis

Fig. 3

The grouping algorithm of the granulomatosis with polyangiitis patients. First, the patients were divided into two groups by scoring of osteitis, global osteitis scoring scale (GOSS), at last CT. Patients with GOSS equal to zero constituted the no osteitis group, left column of the figure. Next the patients with GOSS >0 were divided into two groups based on ΔDRM, which is the slope of diameter ratio measurement (DRM) plotted against the time points of the CT scans for each patient. The median division of the DRM is shown in Fig. 2. Patients with ΔDRM ≥ the median constituted the stable group, middle plot, and patients with ΔDRM < the median were the progressive group, the right plot. The images above the three line plots show a slice through the maxillary sinus from the first and the last CT from a typical patient from each group

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BMC Medical Imaging

ISSN: 1471-2342

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