Fig. 1From: Abdominal organ position variation in children during image-guided radiotherapya Delineated organs (right kidney: purple, left kidney: blue, liver: yellow, spleen: pink) on the reference CT. Diaphragm domes are not delineated. Arrows indicate mutual correlations investigated. b Example of the two-step rigid registration (from top to bottom): unaligned overlap of reference CT and CBCT, bones aligned, right kidney aligned (note: bones shifted). (Color figure online only)Back to article page