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Distance-length ratio in a straight/dead (A) and curved/alive (B) C. elegans. The values for the DLR are (A) 116/112 = 1.04 and (B) 21/104 = 0.20. The skeleton length is represented by the number of pixels in the skeleton, and therefore, the ratio may exceed 1. The cyan line represents the skeleton length, and the yellow line the end-to-end length.
