STUDY DESIGN: Retrospective, blinded analysis of imaging studies. OBJECTIVE: The aim of this study is compare the use of magnetic resonance imaging (MRI) to lateral radiograph using bolster in the evaluation of @entity8322 ( @entity8322 ) curve flexibility measurement. SUMMARY AND BACKGROUND DATA: The flexibility of the thoracic curve [thoracic kyphosis (TK)] in @entity8322 is of primary importance in its preoperative planning. Several methods have been described for @entity8322 curve flexibility measurement. The most commonly used method is lateral @entity3579 radiography on hard bolster [ @entity3579 radiograph (HE)]. No current methods use MRI for flexibility assessment. MATERIALS AND METHODS: Flexibility of TK in @entity8322 @entity1 was measured as a difference between standing radiograph and bolster-assisted lateral HE or supine MRI. The sagittal Cobb angle of the TK was measured between the superior endplate of T4 and the inferior endplate of T12 vertebral body. Flexibilities measured by these 2 methods were compared and analyzed using the generalized estimating equation analysis and the correlation analysis. RESULTS: We assessed 18 @entity8322 @entity1 (14 males and 4 females) with mean age of 20.06  6.03 years. The standing TK x-rays showed 83.8  6.1 degrees. On HE, TK curve reduced by 39.3 degrees (95% confidence interval, 35.8-42.9) to 44.5  6.2 degrees (P<0.001). Preoperative MRI images showed TK of 53.8  5.9 degrees which means reduction by 30 degrees (95% confidence interval, 26.6-33.4) from the standing radiographs (P<0.001). Linear dependency between HE and MRI flexibility with a mean difference of 9.3 degrees was found (R=0.61, P<0.001). CONCLUSIONS: Our study shows that preoperative MRI can be used for @entity8322 flexibility assessment with similar predictive value as routinely used bolster-assisted @entity3579 lateral radiograph. Consequently, @entity1 exposure to preoperative @entity3579 ionizing radiation may be reduced.

Can MRI Predict Flexibility in Scheuermann Kyphosis XXXX ?

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity3579 :: ('MESH:C536192', 'Disease') :: ['hyperextension'] @entity8322 :: ('MESH:D012544', 'Disease') :: ['Scheuermann kyphosis', 'SK']
@entity1 :: (9606,Species) :: ['Patients']
