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. Author manuscript; available in PMC: 2020 Jan 1.
Published in final edited form as: Bone. 2018 Jan 10;118:69–76. doi: 10.1016/j.bone.2018.01.009

Figure 2.

Figure 2

T1-weighted MR images of the pelvis showing normal physiologic conversion of red (hematopoietic) to yellow (fatty) marrow. At birth (A) marrow is red and diffusely hypointense (dark) (diamonds) compared to subcutaneous fat. During adolescences (B), physiologic conversion from red to fatty marrow occurs, involving first the epiphyses and epiphysis equivalents, such as the greater trochanters, and diaphyses (black diamonds) while the metaphyses still contain red marrow (white diamond). In adulthood (C), there is nearly complete conversion to fatty marrow with only few remaining islands of red marrow (curved arrows).