Comparison between enhanced susceptibility-weighted angiography and time of flight sequences in the detection of arterial occlusion in acute ischemic stroke
| Autor: | M. Uettwiller, Alexandre Mackowiak, J-F Budzik, Sébastien Verclytte, O. Vanaerde, Xavier Leclerc, L. Norberciak |
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| Rok vydání: | 2017 |
| Předmět: |
Male
medicine.medical_specialty 030218 nuclear medicine & medical imaging 03 medical and health sciences Imaging Three-Dimensional 0302 clinical medicine Double-Blind Method Image Interpretation Computer-Assisted Occlusion Ischemic lesion Humans Medicine Radiology Nuclear Medicine and imaging Prospective Studies Acute ischemic stroke Aged Acute stroke Radiological and Ultrasound Technology medicine.diagnostic_test business.industry Image Enhancement Arterial occlusion Cerebral Angiography Stroke Diffusion Magnetic Resonance Imaging Angiography Susceptibility weighted imaging Female Neurology (clinical) Radiology business Magnetic Resonance Angiography 030217 neurology & neurosurgery |
| Zdroj: | Journal of Neuroradiology. 44:210-216 |
| ISSN: | 0150-9861 |
| DOI: | 10.1016/j.neurad.2017.01.125 |
| Popis: | Purpose Optimizing the MRI protocol in acute ischemic stroke remains a challenging issue. In this field, susceptibility-weighted sequences have proved their superiority over T2*. Besides the strengthened susceptibility effect, enhanced susceptibility-weighted angiography (eSWAN) sequence provides also a time-of-flight (TOF) effect, allowing the exploration of the intracranial arterial circulation. The objective of our study was to compare eSWAN and 3D TOF, considered as the reference, in the detection of arterial occlusion in acute stroke. Methods Patients who underwent MRI between March and July 2014 for suspected acute stroke with an acute ischemic lesion on diffusion-weighted imaging (DWI) were prospectively included in this study. eSWAN and TOF images were analyzed under double-blind conditions by a junior radiologist and a senior neuroradiologist for the detection of arterial occlusion. eSWAN images were assessed in order to estimate the inter-observer agreement. After a consensus, eSWAN and TOF data were compared to calculate inter-modality agreement. Results Thirty-four patients were included. Inter-observer agreement was excellent (kappa: 0.96) for eSWAN detection of occlusion. After consensus, comparison between TOF and eSWAN showed substantial agreement (kappa: 0.71). eSWAN provided better detection of distal occlusions, but poorer performance for detection of siphon occlusions. Conclusions Shortest echoes eSWAN images enabled detection of arterial occlusion with substantial agreement with TOF images. The susceptibility vessel sign associated with the TOF effect improved the identification of distal occlusions. In acute stroke protocol, eSWAN may represent a valuable alternative to T2* and TOF sequences. |
| Databáze: | OpenAIRE |
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