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Mixed intravascular and epidural contrast injection. A, Intravascular injection appears as discrete foci of contrast (arrowheads) away from the needle tip and adjacent main, epidural contrast collection. B, The intravascular contrast almost completely disappears (arrowheads) on immediate repeat CT-fluoroscopic imaging. This rapid resolution of contrast confirmed but was not required for identification of intravascular contrast. The needle tip position is junctional on these images.
