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. 2020 Sep 4;85:e489–e508. doi: 10.5114/pjr.2020.99414

Table 3.

Grading of stress fractures

Stress fracture Magnetic resonance imaging features
Grade 1 Subtle periosteal soft tissue oedema on fluid-sensitive sequence
Grade 2 Mild subcortical bone marrow oedema and periosteal soft tissue oedema on fluid-sensitive sequences
Grade 3 Extensive bone marrow oedema and periosteal soft tissue oedema on both T1-weighted and fluid-sensitive sequences
Grade 4 Discrete hypointense fracture line on all sequences