OBJECTIVE: Careful follow up is necessary after intracranial stenting because in-stent restenosis (ISR) or residual stenosis (RS) is not rare. A minimally invasive follow-up imaging technique is desirable. The objective was to compare the visualisation of stents in Flat Detector-CT Angiography (FD-CTA) after intravenous contrast medium injection (i.v.) with Multi Detector Computed Tomography Angiography (MD-CTA) and Digital Subtracted Angiography (DSA) in an animal model. METHODS: Stents were implanted in the carotid artery of 12 rabbits. In 6 a residual stenosis (RS) was surgically created. Imaging was performed using FD-CTA, MD-CTA and DSA. Measurements of the inner and outer diameter and cross-section area of the stents were performed. Stenosis grade was calculated. RESULTS: In subjective evaluation FD-CTA was superior to MD-CTA. FD-CTA was more accurate compared with DSA than MD-CTA. Cross-sectional area of the stent lumen was significantly larger (p < 0.05) in FD-CTA in comparison to MD-CTA. Accurate evaluation of stenosis was impossible in MD-CTA. There was no statistically significant difference in the stenosis grade of DSA and FD-CTA. CONCLUSION: Our results show that visualisation of stent and stenosis using intravenous FD-CTA compares favourably with DSA and may replace DSA in the follow-up of patients treated with intracranial stents.
OBJECTIVE: Careful follow up is necessary after intracranial stenting because in-stent restenosis (ISR) or residual stenosis (RS) is not rare. A minimally invasive follow-up imaging technique is desirable. The objective was to compare the visualisation of stents in Flat Detector-CT Angiography (FD-CTA) after intravenous contrast medium injection (i.v.) with Multi Detector Computed Tomography Angiography (MD-CTA) and Digital Subtracted Angiography (DSA) in an animal model. METHODS: Stents were implanted in the carotid artery of 12 rabbits. In 6 a residual stenosis (RS) was surgically created. Imaging was performed using FD-CTA, MD-CTA and DSA. Measurements of the inner and outer diameter and cross-section area of the stents were performed. Stenosis grade was calculated. RESULTS: In subjective evaluation FD-CTA was superior to MD-CTA. FD-CTA was more accurate compared with DSA than MD-CTA. Cross-sectional area of the stent lumen was significantly larger (p < 0.05) in FD-CTA in comparison to MD-CTA. Accurate evaluation of stenosis was impossible in MD-CTA. There was no statistically significant difference in the stenosis grade of DSA and FD-CTA. CONCLUSION: Our results show that visualisation of stent and stenosis using intravenous FD-CTA compares favourably with DSA and may replace DSA in the follow-up of patients treated with intracranial stents.
Authors: Elad I Levy; Aquilla S Turk; Felipe C Albuquerque; David B Niemann; Beverly Aagaard-Kienitz; Lee Pride; Phil Purdy; Babu Welch; Henry Woo; Peter A Rasmussen; L Nelson Hopkins; Thomas J Masaryk; Cameron G McDougall; David J Fiorella Journal: Neurosurgery Date: 2007-09 Impact factor: 4.654
Authors: H J Cloft; T A Altes; W F Marx; R J Raible; S B Hudson; G A Helm; J W Mandell; M E Jensen; J E Dion; D F Kallmes Journal: Radiology Date: 1999-10 Impact factor: 11.105
Authors: G Richter; T Engelhorn; T Struffert; M Doelken; O Ganslandt; J Hornegger; W A Kalender; A Doerfler Journal: AJNR Am J Neuroradiol Date: 2007-09-24 Impact factor: 3.825
Authors: David J Fiorella; Elad I Levy; Aquilla S Turk; Felipe C Albuquerque; G Lee Pride; Henry H Woo; Babu G Welch; David B Niemann; Phillip D Purdy; Beverly Aagaard-Kienitz; Peter A Rasmussen; L Nelson Hopkins; Thomas J Masaryk; Cameron G McDougall Journal: Stroke Date: 2008-10-16 Impact factor: 7.914
Authors: C J Lin; S C Hung; W Y Guo; F C Chang; C B Luo; J Beilner; M Kowarschik; W F Chu; C Y Chang Journal: AJNR Am J Neuroradiol Date: 2012-04-12 Impact factor: 3.825
Authors: Woori Koh; Kai Kallenberg; André Karch; Tobias Frank; Michael Knauth; Mathias Bähr; Jan Liman Journal: BMC Neurol Date: 2017-05-11 Impact factor: 2.474