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. Author manuscript; available in PMC: 2021 Dec 1.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2020 Jul 3;108(5):1240–1247. doi: 10.1016/j.ijrobp.2020.06.071

Fig. 4.

Fig. 4.

The custom-based active bone marrow (purple) may include outliers, such as seen in the left femur in this patient. The atlas-based method (blue), by virtue of averaging, removes outliers, consequently avoiding unnecessarily restrictive planning constraints that potentially compromise sparing of the overall pelvic bone volume.