Abstract:
AIM:To measure the normal distances (and range) from the tip of the odontoid peg to the different reference skull baselines (Chamberlain's, McGregor's, and McRae's line) using magnetic resonance imaging (MRI). MATERIALS AND METHODS:We retrospectively evaluated midline sagittal MRI brain images of 200 adults chosen randomly. Patients did not have symptoms or signs suggestive of basilar impression, spinal trauma, vertebral collapse or disease. Using SPSS data analysis program histograms, mean and standard deviation (SD), median and range values were calculated. These findings were then compared with previous plain radiograph measurements. RESULTS:The mean position of the odontoid peg was 1.2 mm (median 1.5 mm, SD 3 mm) below Chamberlain's line; 0.9 mm (median 1.1, SD 3 mm) below McGregor's line; and 4.6 mm (median 4.8, SD 2.6) below McRae's line. CONCLUSION:Based on the current population, these results provide the mean and range of normal distances from the odontoid peg to the most frequently used skull baselines using MRI.
journal_name
Clin Radioljournal_title
Clinical radiologyauthors
Cronin CG,Lohan DG,Mhuircheartigh JN,Meehan CP,Murphy JM,Roche Cdoi
10.1016/j.crad.2007.03.008subject
Has Abstractpub_date
2007-09-01 00:00:00pages
897-903issue
9eissn
0009-9260issn
1365-229Xpii
S0009-9260(07)00167-5journal_volume
62pub_type
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