Midsagittal MDCT image of the craniocervical junction demonstrates the Powers ratio, which is calculated by dividing the distance between the tip of the.

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Presentation transcript:

Midsagittal MDCT image of the craniocervical junction demonstrates the Powers ratio, which is calculated by dividing the distance between the tip of the basion to the spinolaminar line by the distance from the tip of the opisthion to the midpoint of the pos... Midsagittal MDCT image of the craniocervical junction demonstrates the Powers ratio, which is calculated by dividing the distance between the tip of the basion to the spinolaminar line by the distance from the tip of the opisthion to the midpoint of the posterior aspect of the anterior arch of C1. C.A. Rojas et al. AJNR Am J Neuroradiol 2007;28:1819-1823 ©2007 by American Society of Neuroradiology