Calcium Sign

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The calcium sign is a finding on chest x-ray that suggests aortic dissection. It is the separation of the intimal calcification from the outer aortic soft tissue border by 10mm. <a class="external" href="" rel="nofollow" target="_blank">(</a> This is not an important sign for radiographers given that it is rarely seen.

Plain film Appearance
calcium signcalcium sign
The arrowed distance represents a normal aortic wall thicknessThe arrowed distance represents the aneurysmal wall thickness.