Mylène Jansen

Comparing radiographic JSW and MRI cartilage thickness using CT 243 12 Figure 2 : Representative image of the 4 techniques that are compared; all images are taken from the same patient before treatment (baseline). For MRI and 3D CT 1 slice is shown, since they are 3D imaging techniques. The 2D CT images is created by over-projecting the CT scan, after standardized positioning, in the coronal plane. Results Patients Of the 20 patients originally included, 3 patients were lost to follow-up because they converted to a different treatment within 2 years after the original distraction treatment. Of 1 patient, no CT scan at baseline and 2 years was available. Of the remaining 16 patients, 2 had severe motion artifacts present in either of their 2 MRI scans disqualifying proper analyses. As such, 14 patients completed all imaging protocols at both time points and were used for evaluation. The patient characteristics and image analysis results for the 14 included patients are shown in Table 1. Baseline parameters are comparable to those of the entire population of KJD patients from both original RCTs, as published before, so this small subpopulation seems representable for the entire KJD population. 27