高齢者脊椎椎体骨折保存治療例のＸ線学的検討

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  • Usefulness of MRI for Predicting Collapsing Rate of Fractured Vertebrae.

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The purpose of this study was to determine whether MR imaging is useful to predict the collapsing rate of fractured thoracolumbar spine.<br>We treated 18 patients (male; 4, female; 14) who exhibited thoracic or lumbar vertebral body fractures (22 vertebral fractures: compression fracture 17, burst fracture; 22).<br>The age of the patients ranged from 68 to 78 years (average; 70 years). All patients received a body cast or hard orthosis. The collapsing rate of the fractured vertebra and kyphotic angle of the adjacent segments were measured with pre-treatment and post-treatment lateral radiography. MRI was performed in all patients during treatment.<br>The kyphotic angle changed from 14.9° to 16°. The collapsing rate of the anterior vertebral height changed from 76.2% to 71.2%, that of the middle vertebral height from 75.3% to 65.3% and that of the posterior vertebral height from 95.0% to 93.6%. The collapsing rate of the middle vertebral height before treatment was correlated to the kyphotic angle after treatment. The low signal intensity area of the fractured vertebra on T1 weighted imaging was not correlated with the radiological collapsing rate.<br>MR imaging did not predict the collapsing rate of the fractured vertebra.

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