@article {Claren{\c c}on1966, author = {F. Claren{\c c}on and F. Di Maria and J. Gabrieli and E. Shotar and V. Degos and A. Nouet and A. Biondi and N.-A. Sourour}, title = {Clinical Impact of Flat Panel Volume CT Angiography in Evaluating the Accurate Intraoperative Deployment of Flow-Diverter Stents}, volume = {38}, number = {10}, pages = {1966--1972}, year = {2017}, doi = {10.3174/ajnr.A5343}, publisher = {American Journal of Neuroradiology}, abstract = {BACKGROUND AND PURPOSE: The deployment of flow-diverter stents may be difficult to analyse on regular DSA. The purpose of our study was to investigate the clinical impact of stent-dedicated flat panel volume CT angiography to evaluate intraoperatively the satisfactory deployment of flow-diverter stents.MATERIALS AND METHODS: From January 2009 to April 2015, 83 consecutive patients (mean age, 51 years; 62 women) were treated in our institution with flow-diverter stents. Eighty-seven aneurysms (82 unruptured, 5 ruptured; 77 anterior, 10 posterior circulation) were treated in these 83 patients (4 patients had 2 aneurysms, both treated by means of flow-diverter stents). One patient was treated for a traumatic carotid cavernous fistula. In 80\% of the cases (68/85) a flat panel volume CT angiography was performed in the angiographic suite just after the flow-diverter stent deployment. Stent visualization was assessed by 2 independent reviewers. The clinical impact of stent malapposition was evaluated.RESULTS: Flow-diverter stent visualization was satisfactory in 73.5\% of the cases. In 2 cases (2.9\%) the flat panel volume CT angiography prompted the operator to perform an additional intrastent angioplasty for a condition that was previously underestimated. Four patients (4.7\%) experienced acute thromboembolic complications; 3 others had delayed thromboembolic complications. Only 1 of these patients had thromboembolic complications (acute or delayed) related to stent misdeployment, which was easily managed intraoperatively with no clinical consequence.CONCLUSIONS: Flat panel volume CT angiography is an interesting tool to depict flow-diverter stent misdeployment and may encourage the operator to perform intrastent angioplasty (2.9\% of the cases in our experience) to reduce the risks of thromboembolic complications.FDSflow-diverter stentFPV-CTAflat panel volume CT angiography}, issn = {0195-6108}, URL = {https://www.ajnr.org/content/38/10/1966}, eprint = {https://www.ajnr.org/content/38/10/1966.full.pdf}, journal = {American Journal of Neuroradiology} }