Radiography and MRI for Assessment of Acromial Shape

Using 3-dimensional models constructed from MR images as their gold standard, Mayerhoefer et al compared outlet view radiographs and MRI for assessment of the shape of the acromion (types 1-3). They found that MRI had good correlation (K=0.66) to the 3-dimensional model when two oblique coronal slices were used in conjunction: A slice 4 mm medial to the lateral margin of the acromion (1) and a slice lateral to the acromioclavicular joint (2). Outlet view radiographs had moderate correlation to the shape of the acromion (K=0.55), which was still better than any single MRI slice.

References

Mayerhoefer ME, Breitenseher MJ, Roposch A, Treitl C, Wurnig C. Comparison of MRI and conventional radiography for assessment of acromial shape. AJR Am J Roentgenol. 2005 Feb;184(2):671-5.