Fig. 4From: Comparison of carina-based versus bony anatomy-based registration for setup verification in esophageal cancer radiotherapyAbsolute systematic error (SE) and standard deviation (SD) of random errors (sdRE) of the marker position relative to the bony anatomy and carina. The SD of SEs (Σ) and the root mean square of sdREs (σ) are also depictedBack to article page