Centricity pacs software

The Visual Analog Scale (VAS) for leg pain, Oswestry Disability Index (ODI), 12-Item Short-Form Health Survey (SF-12), and preoperative and postoperative 4-, 12-, and 24-week Macnab criteria were obtained for all patients. In addition, preoperative and 24-week postoperative lumbar spine MRIs were evaluated to identify changes in disc volume after SELD. Disc volume was calculated by the following equation: height (mm) × area (mm²). The height was defined as the maximal diameter of the disc space (Figure 3(a)). The area of disc protrusion was obtained by using a region of interest (ROI) defined with Centricity PACS software (GE Healthcare, Little Chalfont, BKM, England), as in Figure 3(b).
VAS, ODI, and SF-12 scores were analyzed by the repeated measures analysis of variance (RM-ANOVA) with Bonferroni correction (P < 0.0125). Success rates of Macnab criteria were analyzed by the chi-square test. The change in protruded disc volume between pre- and postoperative SELD measurements was analyzed by the Wilcoxon signed-rank test. All statistical analyses were performed using SPSS software version 18 (SPSS Inc., Chicago, IL, USA), and statistical significance was defined as P < 0.05.

The PTS was observed and measured using GE Centricity PACS software. The anterior tibial cortex method was used. First, line 1 was made tangential to the anterior cortex of the upper segment of the tibia on the lateral X-ray image, to represent the long axis of the tibia. Then, line 2 was drawn perpendicular to tangential line 1. Finally, line 3 was drawn tangential to the tibial plateau. The angles formed by lines 2 and 3 represent the PTS (Fig. 1) [4 (link)].Fig. 1

The measurement method of posterior tibial slope (PTS)^*. ^*X-ray lateral inspection: line 1 is the tangent line of the proximal tibia on the anterior cortex surface, line 2 is the perpendicular to line 1, and line 3 is the tangent line of the tibial plateau