There are about a dozen x-ray findings, but two of them are especially important: Loss of the aortic knob/aortic-pulmonary window and the calcium sign. Look for a white line of calcium within the aortic knob. Then measure the distance from there to the outer edge of the aortic knob. A distance >0.5cm is considered a positive calcium sign and a distance >1.0cm is considered highly suspicious for aortic dissection. #Clinical #Diagnosis #Radiology #CXR #ChestXRay #Aortic #Dissection #CalciumSign
