Ghost twisting of the dual-layer flow-diverting stent

This study reports two cases of acute in-stent blood flow disturbances after the deployment of FRED in a patient with intracranial aneurysms associated with “ghost twisting.” In this phenomenon, the inner layer does not expand with the coning deformation, even though the outer layer is fully open. This was confirmed through high-resolution cone-beam computed tomography, but not conventional angiography. The two cases were successfully treated using balloon angioplasty and showed favorable outcomes. The structural issue of “ghost twisting” was a possible underlying factor for the ischemic complications associated with FRED deployment.
Source: Neuroradiology - Category: Radiology Source Type: research