Table 6 Bone marrow burden (BMB) classification

Involvement

Site

Score

Site

Score

Diaphysis

1

Patchy

1

Proximal epiphysis/apophysis

2

Diffuse

2

Distal epiphysis

3

Absence of fat in basiverteral region

1

Sequence

Signal intensity^a

Score

Signal intensity^b

Score

T₂-weighted, (or, STIR)^c

Hyperintense

2 (2)

Hyperintense

2 (2)

Slightly hyperintense

1 (1)

Slightly hyperintense

1 (1)

Isointense

0 (0)

Isointense

0 (0)

Slightly hypointense

1 (N/A)

Slightly hypointense

1 (N/A)

Hypointense

2 (N/A)

Hypointense

2 (N/A)

Mixed type

3 (3)

T₁-weighted

Slightly hyperintense or isointense

0

Slightly hyperintense

0

Slightly hypointense

1

Isointense

1

Hypointense

2

Slightly hypointense

2

Hypointense

3

Sum

Sum