Journal of Korean Neurosurgical Society

  • 제45권5호
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  • Pages.284-288
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  • 2009
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  • 2005-3711(pISSN)
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  • 1598-7876(eISSN)
대한신경외과학회 (The Korean Neurosurgical Society)
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Assessment of the Intracranial Stents Patency and Re-Stenosis by 16-Slice CT Angiography with Optimized Sharp Kernel : Preliminary Study

  • Choo, Ki-Seok (Departments of Diagnostic Radiology, Pusan National University Yangsan Hospital, Pusan National University School of Medicine) ;
  • Lee, Tae-Hong (Departments of Diagnostic Radiology, Pusan National University Hospital, Pusan National University School of Medicine) ;
  • Choi, Chang-Hwa (Departments of Neurosurgery, Pusan National University Hospital, Pusan National University School of Medicine) ;
  • Park, Kyung-Pil (Departments of Neurology, Pusan National University Yangsan Hospital, Pusan National University School of Medicine) ;
  • Kim, Chang-Won (Departments of Diagnostic Radiology, Pusan National University Hospital, Pusan National University School of Medicine) ;
  • Kim, Suk (Departments of Diagnostic Radiology, Pusan National University Hospital, Pusan National University School of Medicine)
  • 발행 : 2009.05.28
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초록

Objective : Our retrospective study aimed to determine whether 16-slice computerized tomography (CT) angiography optimized sharp kernel is suitable for the evaluation of visibility, luminal patency and re-stenosis of intracranial stents in comparison with conventional angiography. Methods : Fifteen patients with symptomatic intracranial stenotic lesions underwent balloon expandable stent deployment of these lesions (10 middle cerebral arteries, 2 intracranial vertebral arteries, and 3 intracranial internal carotid arteries). CT angiography follow-up ranged from 6 to 15 months (mean follow-up, 8 months) after implantation of intracranial stents and conventional angiography was confirmed within 2 days. Curved multiplanar reformations with maximal intensity projection (MIP) with optimal window settings for assessment of lumen of intracranial stents were evaluated for visible lumen diameter, stent patency (contrast distal to the stent as an indirect sign), and re-stenosis by two experienced radiologists who blinded to the reports from the conventional angiography. Results : All of stents deployed into symptomatic stenotic lesions. All stents were classified as patent and no re-stenosis, which was correlated with results of conventional angiography. Parts of the stent lumen could be visualized in all cases. On average, 57% of the stent lumen diameter was visible using optimized sharp kernel. Significant improvement of lumen visualization (22%, p<0.01) was observed using the optimized sharp kernel compared with the standard sharp kernel. Inter-observer agreements on the measurement of lumen diameter and density were judged as good, respectively (p<0.05). Conclusion : Sixteen-slice CT using the optimized sharp kernel may provide a useful information for evaluation of lumen diameter patency, and re-stenosis of intracranial stents.

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참고문헌

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  2. Flat-detector computed tomography in the assessment of intracranial stents: comparison with multi detector CT and conventional angiography in a new animal model vol.21, pp.8, 2011, https://doi.org/10.1007/s00330-011-2093-7
  3. Spatial Resolution Limits of Multislice Computed Tomography (MS-CT), C-arm-CT, and Flat Panel-CT (FP-CT) Compared to MicroCT for Visualization of a Small Metallic Stent vol.18, pp.7, 2009, https://doi.org/10.1016/j.acra.2011.02.012
  4. Evaluation of middle cerebral artery stents using multidetector row CT angiography in vivo study: comparison of the three different kernels vol.53, pp.4, 2012, https://doi.org/10.1258/ar.2012.110659
  5. Surveillance imaging after intracranial stent implantation: non-invasive imaging compared with digital subtraction angiography vol.5, pp.4, 2013, https://doi.org/10.1136/neurintsurg-2012-010341
  6. Evaluation of Noninvasive Follow-up Methods for the Detection of Intracranial In-Stent Restenosis: A Phantom Study vol.48, pp.2, 2009, https://doi.org/10.1097/rli.0b013e318276db43
  7. Computed Tomography Coronary Stent Imaging With Iterative Reconstruction: A Trade-off Study Between Medium Kernel and Sharp Kernel vol.38, pp.4, 2014, https://doi.org/10.1097/rct.0000000000000080
  8. Effects of kernel and window setting combinations on assessments of small and complicated vasculature in computed tomography angiographic images of dogs with and without tumors vol.81, pp.12, 2009, https://doi.org/10.2460/ajvr.81.12.940