Purpose: The purpose of this study was to present the various vertebral bone signal and configuration patterns on T2WI MRI in osteoporotic benign fractures. The appearances were also assessed with thin slice MPR CT images.
Materials And Methods: 66 patients (43 women, 23 men; age range, 34-97 years; mean age, 76 years) with 100 vertebral compression fractures due to osteoporosis were included in our study. All cases are acute or subacute phase fractures which occurred within 1 month. Multiple fractures were observed in 29 patients, in 8 cases multiple concurrent fractures were proved by past radiograph or MRI. Three planes of T2WI (sagittal, coronal, axial) section images were correlated with the corresponding MDCT images.
Results: In our retrospective study, various signals and forms of vertebral body fractures were observed. The fracture zone (line) was classified 3 signal intensity patterns. (high; n = 24, low to intermediate; n = 16, low intensity; n = 38) on T2WI. The signal of the peri(para) fractured area were high (n = 6), intermediate to low (n = 41), low (n = 53)intensity. With CT correlative study, high, low to intermediate area were considered to be corresponded to the bone marrow edema, fibrous reparative tissue with/without the bony callus formation. The localization were as follows: sub-end plate band like lesion in 53, central in 16, anterior in 13, sub-endplate+anterior in 10, and complete (diffuse) in 8. In 10 cases, adjacent Schmorl's nodules were observed.
Conclusion: The various vertebral body signal patterns were observed in osteoporotic compressive fracture on T2WI. By MRI-CT correlations, high signal and low signal area on T2WI corresponded to the bone marrow edema, and the fibrous tissue or callus formation respectively.
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