Figure 3From: Feasibility of preoperative 125I seed-guided tumoural tracer injection using freehand SPECT for sentinel lymph node mapping in non-palpable breast cancerBland-Altman analysis for the interobserver agreement between freehand SPECT-guided and US-guided injections. The analysis indicates, with the black broken line, the average of the measurements. The upper and lower red broken lines represent the Bland-Altman limits within the 95% confidence interval.Back to article page