Percentage Distribution of Active Bone Marrow, Bone Volume Fractions, and Marrow Cellularity Within Adult Skeleton (41–50 y) as Given in ICRP Publication 70 (7)
| Skeletal site (no. of bones) | Bone volume fraction* (BVF = 1 − MVF) | Marrow cellularity† (CF) | Active marrow‡ (% by mass) |
|---|---|---|---|
| Craniofacial bones | 0.554 | 0.38 | 7.6 |
| Mandible (1) | 0.104 | 0.38 | 0.8 |
| Scapulae (2) | 0.104 | 0.38 | 2.8 |
| Clavicles (2) | 0.104 | 0.33 | 0.8 |
| Sternum (1) | 0.104 | 0.70 | 3.1 |
| Ribs (12) | 0.104 | 0.70 | 16.1 |
| Cervical vertebrae (7) | 0.119 | 0.70 | 3.9 |
| Thoracic vertebrae (12) | 0.119 | 0.70 | 16.1 |
| Lumbar vertebrae (5) | 0.119 | 0.70 | 12.3 |
| Sacrum (1) | 0.119 | 0.70 | 9.9 |
| Os coxae (1) | 0.199 | 0.48 | 17.5 |
| Femora (proximal) (2) | 0.148 | 0.25 | 6.7 |
| Humeri (proximal) (2) | 0.148 | 0.25 | 2.3 |
↵* Source: Table 15 of ICRP Publication 70 (7). Data taken for ages 41–50 y. Values of BVF for mandible, scapulae, clavicles, and sternum are approximated by those listed for ribs. Value for proximal humeri taken to be that listed for proximal femora. Data are pooled for both males and females.
↵† Source: Table 41 of ICRP Publication 70 (7). Values of marrow cellularity for sacrum taken to be that listed for vertebrae. Data are pooled for both males and females.
↵‡ Source: Table 40 of ICRP Publication 70 (7). Values taken from that listed for 40-y adult. No distinction made between males and females.