, The National Institute of Neurological Disorders and Stroke rt-PA Stroke Study Group. Tissue plasminogen activator for acute ischemic stroke, N Engl J Med, vol.333, issue.24, pp.1581-1588, 1995.

Y. P. Gobin, S. Starkman, G. R. Duckwiler, T. Grobelny, C. S. Kidwell et al., MERCI 1: a phase 1 study of Mechanical Embolus Removal in Cerebral Ischemia, Stroke, vol.35, issue.12, pp.2848-54, 2004.

W. S. Smith, G. Sung, S. Starkman, J. L. Saver, and M. P. Marks, Safety and efficacy of mechanical embolectomy in acute ischemic stroke: results of the MERCI trial, MERCI Trial Investigators, vol.36, pp.1432-1440, 2005.

W. Hacke, M. Kaste, E. Bluhmki, M. Brozman, A. Dávalos et al., Thrombolysis with alteplase 3 to 4.5 hours after acute ischemic stroke, N Engl J Med, vol.359, issue.13, pp.1317-1346, 2008.

Y. Bejot, A. Catteau, and M. Giroud, Trends in incidence, risk factors, and survival in symptomatic lacunar stroke in Dijon, France, from 1989 to 2006: a population-based study, Stroke, vol.39, pp.1945-51, 2008.

, European Registers of Stroke Investigators. Incidence of stroke in Europe at the beginning of the 21st century, Stroke, vol.40, pp.1557-63, 2009.

C. De-peretti, F. Chin, P. Tuppin, Y. Béjot, M. Giroud et al., Personnes hospitalisées pour accident vasculaire cérébral en France : tendances 2002-2008, Bull Epidemiol Hebd, vol.10, issue.11, pp.125-155, 2012.

P. M. Rothwell, A. J. Coull, and L. E. Silver, Population-based study of event-rate, incidence, case fatality, and mortality for all acute vascular events in all arterial territories (Oxford Vascular Study), Lancet, vol.366, pp.1773-83, 2005.

V. Larrue, Accidents ischémiques cérébraux. Encyclop Méd Chir Angéiologie, pp.19-0560, 2015.

C. De-peretti, O. Grimaud, P. Tuppin, F. Chin, and F. Woimant, Prévalence des accidents vasculaires cérébraux et de leurs séquelles et impact sur les activités de la vie quotidienne : apports des enquêtes déclaratives Handicap-santé-ménages et Handicap-santé-institution, 2008.

G. A. Donnan, J. C. Baron, H. Ma, and S. M. Davis, Penumbral selection of patients for trials of acute stroke therapy, Lancet Neurol, vol.8, pp.261-269, 2009.

J. C. Baron, Mapping the ischaemic penumbra with PET: implications for acute stroke treatment, Cerebrovasc Dis, vol.9, pp.193-201, 1999.

A. J. Grau, C. Weimar, and F. Buggle, Risk factors, outcome, and treatment in subtypes of ischemic stroke: the German stroke data bank, Stroke, vol.32, pp.2559-66, 2001.

H. P. Adams, B. H. Bendixen, L. J. Kappelle, J. Biller, B. B. Love et al., Classification of subtype of acute ischemic stroke. Definitions for use in a multicenter clinical trial. TOAST. Trial of Org 10172 in Acute Stroke Treatment, Stroke, vol.24, pp.35-41, 1993.

M. D. Hill and V. Hachinski, Stroke treatment: time is brain, Lancet, vol.352, issue.3, pp.10-14, 1998.

J. L. Saver, Time is brain-quantified, Stroke, vol.37, issue.1, pp.263-269, 2006.

J. H. Rha and J. L. Saver, The impact of recanalization on ischemic stroke outcome: a meta-analysis, Stroke, vol.38, issue.3, pp.967-73, 2007.

M. Hernandez-perez, N. Perez-de-la-ossa, and A. Aleu, Natural history of acute stroke due to occlusion of the middle cerebral artery and intracranial internal carotid artery, J Neuroimaging, vol.24, pp.354-358, 2014.

A. V. Alexandrov, C. A. Molina, and J. C. Grotta, Ultrasound-enhanced systemic thrombolysis for acute ischemic stroke, N Engl J Med, vol.351, pp.2170-2178, 2004.

J. P. Broderick, Y. Y. Palesch, A. M. Demchuk, S. D. Yeatts, P. Khatri et al., Endovascular therapy after intravenous t-PA versus t-PA alone for stroke, N Engl J Med, vol.368, pp.893-903, 2013.

C. S. Kidwell, R. Jahan, J. Gornbein, J. R. Alger, V. Nenov et al., A trial of imaging selection and endovascular treatment for ischemic stroke, N Engl J Med, vol.368, pp.914-923, 2013.

A. Ciccone, L. Valvassori, M. Nichelatti, A. Sgoifo, M. Ponzio et al., Endovascular treatment for acute ischemic stroke, N Engl J Med, vol.368, pp.904-913, 2013.

O. A. Berkhemer, P. S. Fransen, D. Beumer, L. A. Van-den-berg, H. F. Lingsma et al., A randomized trial of intraarterial treatment for acute ischemic stroke, N Engl J Med, vol.372, pp.11-20, 2015.

M. Goyal, A. M. Demchuk, B. K. Menon, M. Eesa, J. L. Rempel et al., Randomized assessment of rapid endovascular treatment of ischemic stroke, N Engl J Med, vol.372, pp.1019-1030, 2015.

B. C. Campbell, P. J. Mitchell, T. J. Kleinig, H. M. Dewey, L. Churilov et al., Endovascular therapy for ischemic stroke with perfusion-imaging selection, N Engl J Med, vol.372, pp.1009-1018, 2015.

J. L. Saver, M. Goyal, A. Bonafe, H. C. Diener, E. I. Levy et al., Stent-retriever thrombectomy after intravenous t-PA vs. t-PA alone in stroke, N Engl J Med, vol.10, 1056.
URL : https://hal.archives-ouvertes.fr/hal-02007226

T. G. Jovin, A. Chamorro, E. Cobo, M. A. De-miquel, C. A. Molina et al., Thrombectomy within 8 hours after symptom onset in ischemic stroke, N Engl J Med, vol.10, 1056.

J. Mocco, P. Khatri, and O. Zaidat, Aspiration Thrombectomy After Intravenous Alteplase Versus Intravenous Alteplase Alone: The THERAPY trial, Stroke, vol.47, issue.9, pp.2331-2339, 2016.

S. Bracard, X. Ducrocq, and J. L. Mas, Mechanical thrombectomy after intravenous alteplase versus alteplase alone after stroke (THRACE): a randomized controlled trial, Lancet Neurol, vol.15, issue.11, pp.1138-1147, 2016.

M. Goyal, B. K. Menon, and W. H. Van-zwam, Endovascular thrombectomy after large-vessel ischaemic stroke: a meta-analysis of individual patient data from five randomised trials, Lancet, vol.387, pp.1723-1731, 2016.
URL : https://hal.archives-ouvertes.fr/hal-01876049

W. J. Powers, C. P. Derdeyn, and J. Biller, American Heart Association/ American Stroke Association focused update of the 2013 Guidelines for the Early Management of Patients With Acute Ischemic Stroke Regarding Endovascular Treatment, Stroke, vol.46, issue.10, pp.3020-3035, 2015.

N. Wahlgren, T. Moreira, and P. Michel, Mechanical thrombectomy in acute ischemic stroke, Int J Stroke, vol.11, issue.1, pp.134-147, 2016.

R. G. Nogueira, O. O. Zaidat, and R. Gupta, Rescue Thrombectomy in Large Vessel Occlusion Strokes Leads to Better Outcomes than Intravenous Thrombolysis Alone: A 'Real World' Applicability of the Recent Trials, Interv Neurol, vol.5, issue.3-4, pp.101-110, 2016.

A. P. Wolf, P. Clagett, and J. D. Easton, Preventing ischemic stroke in patients with prior stroke and TIA. A statement for healthcare professionals from the Stroke Council of the American Heart Association, Stroke, vol.30, 1991.

E. Fery-lemonnier, La prévention et la prise en charge des accidents vasculaires cérébraux en France. Paris : Ministère de la santé et des sports, 2009.

W. Rosamond, K. Flegal, and K. Furie, Heart disease and stroke statistics-2008 update: A report from the American Heart Association Statistics Committee and Stroke Statistics Subcommittee, vol.117, pp.25-146, 2008.

W. G. Kunz, M. G. Hunink, and K. M. Thierfelder, Cost-Effectiveness of Endovascular Stroke Therapy: A Patient Subgroup Analysis From a US Healthcare Perspective, Stroke, vol.47, issue.11, pp.2797-2804, 2016.

H. Autorité-de-santé, Évaluation de thrombectomie des artères intracrâniennes par voie endovasculaire, 2016.

L. K. Sevick, S. Ghali, M. D. Hill, V. Danthurebandara, D. L. Lorenzetti et al., Systematic Review of the Cost and Cost-Effectiveness of Rapid Endovascular Therapy for Acute Ischemic Stroke, Stroke, vol.48, issue.9, pp.2519-2526, 2017.

C. Lecoffre, C. De-peretti, A. Gabet, O. Grimaud, F. Woimant et al., Mortalité par accident vasculaire cérébral en France en, Bull Epidémiol Hebd, issue.5, pp.95-100, 2008.

C. Lecoffre, C. De-peretti, A. Gabet, O. Grimaud, F. Woimant et al., L'accident vasculaire cérébral en France : patients hospitalisés pour AVC en, Bull Epidémiol Hebd, issue.5, pp.84-94, 2008.

H. Bronnum-hansen, M. Davidsen, P. Thorvaldsen, and . Group, Long-term survival and causes of death after stroke, Stroke, vol.32, pp.2131-2136, 2001.

M. S. Dhamoon, W. Tai, and B. Boden-albala, Risk of myocardial infarction or vascular death after first ischemic stroke: the Northern Manhattan Study, Stroke, vol.38, issue.6, pp.1752-1758, 2007.

C. Weimar, A. Ziegler, I. R. König, and H. Diener, on behalf of the German Stroke Study Collaborators: Predicting functional outcome and survival after acute ischemic stroke, J Neurol, vol.249, pp.888-895, 2002.

D. J. Barker and D. T. Lackland, Prenatal influences on stroke mortality in England and Wales, Stroke, vol.34, pp.1598-1602, 2003.
DOI : 10.1161/01.str.0000077257.27430.7e

URL : https://www.ahajournals.org/doi/pdf/10.1161/01.STR.0000077257.27430.7E

S. Lewington, R. Clarke, N. Qizilbash, R. Peto, and R. Collins, Age-specific relevance of usual blood pressure to vascular mortality: a meta-analysis of individual data for one million adults in 61 prospective studies, Lancet, vol.360, pp.1903-1913, 2002.

C. M. Burchfiel, J. D. Curb, B. L. Rodriguez, R. D. Abbott, D. Chiu et al., Glucose intolerance and 22-year stroke incidence. The Honolulu Heart Program, Stroke, vol.25, pp.951-957, 1994.
DOI : 10.1161/01.str.25.5.951

URL : http://stroke.ahajournals.org/content/strokeaha/25/5/951.full.pdf

S. C. Johnston, D. R. Gress, W. S. Browner, and S. Sidney, Short-term prognosis after emergency department diagnosis of TIA, JAMA, vol.284, issue.22, pp.2901-2907, 2000.
DOI : 10.1001/jama.284.22.2901

URL : https://jamanetwork.com/journals/jama/articlepdf/193353/JOC01269.pdf

H. P. Adams, P. H. Davis, and E. C. Leira, Baseline NIH Stroke Scale score strongly predicts outcome after stroke: A report of the Trial of Org 10172 in Acute Stroke Treatment (TOAST), Neurology, vol.53, issue.1, pp.126-131, 1999.

L. B. Goldstein, R. Adams, M. J. Alberts, L. J. Appel, L. M. Brass et al., Primary prevention of ischemic stroke: a guideline from the American Heart Association/American Stroke Association Stroke Council: cosponsored by the Atherosclerotic Peripheral Vascular Disease Interdisciplinary Working Group; Cardiovascular Nursing Council; Clinical Cardiology Council; Nutrition, Physical Activity, and Metabolism Council; and the Quality of Care and Outcomes Research Interdisciplinary Working Group: the American Academy of Neurology affirms the value of this guideline, Stroke, vol.37, pp.1583-1633, 2006.

A. Gupta and V. Gupta, Metabolic syndrome: what are the risks for humans?, Biosci Trends, vol.4, pp.204-212, 2010.

M. Ebinger, I. Galinovic, M. Rozanski, P. Brunecker, M. Endres et al., Fluid-attenuated inversion recovery evolution within 12 hours from stroke onset: a reliable tissue clock?, Stroke, vol.41, issue.2, pp.250-255, 2010.
DOI : 10.1161/strokeaha.109.568410

URL : http://stroke.ahajournals.org/content/strokeaha/41/2/250.full.pdf

A. F. Geraldo, L. P. Berner, and Y. Berthèzene, Does b1000-b0 Mismatch Challenge DiffusionWeighted Imaging-Fluid Attenuated Inversion Recovery Mismatch in Stroke? Stroke, vol.47, pp.877-81, 2016.
DOI : 10.1161/strokeaha.115.011501

URL : https://www.ahajournals.org/doi/pdf/10.1161/STROKEAHA.115.011501

C. W. Jung and P. Jacobs, Physical and chemical properties of superparamagnetic iron oxide MR contrast agents: ferumoxides, ferumoxtran, ferumoxsil, Magn Reson Imaging, vol.13, pp.661-674, 1995.
DOI : 10.1016/0730-725x(95)00024-b

L. Pauling and C. D. Coryell, The magnetic properties and structure of hemoglobin, oxyhemoglobin and carbonmonoxyhemoglobin, Proc Natl Acad Sci, vol.22, pp.210-216, 1936.
DOI : 10.1073/pnas.22.4.210

URL : http://www.pnas.org/content/22/4/210.full.pdf

S. Flacke, Middle cerebral artery (MCA) susceptibility sign at susceptibility-based perfusion MR imaging: clinical importance and comparison with hyperdense MCA sign at CT, Radiology, vol.215, issue.2, pp.476-82, 2000.
DOI : 10.1148/radiology.215.2.r00ma09476

K. H. Cho, J. S. Kim, S. U. Kwon, A. H. Cho, and D. W. Kang, Significance of susceptibility vessel sign on T2*weighted gradient echo imaging for identification of stroke subtypes, Stroke, vol.36, pp.2379-2383, 2005.

O. Naggara, J. Raymond, D. Ayllon, M. , A. et al., T2* "susceptibility vessel sign" demonstrates clot location and length in acute ischemic stroke, PLoS One, vol.8, p.76727, 2013.
DOI : 10.1371/journal.pone.0076727

URL : https://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0076727&type=printable

L. Legrand, O. Naggara, and G. Turc, Clot burden score on admission T2*-MRI predicts recanalization in acute stroke, Stroke, vol.44, pp.1878-1884, 2013.
DOI : 10.1161/strokeaha.113.001026

URL : https://www.ahajournals.org/doi/pdf/10.1161/STROKEAHA.113.001026

D. S. Liebeskind, N. Sanossian, and W. H. Yong, CT and MRI early vessel signs reflect clot composition in acute stroke, Stroke, vol.42, pp.1237-1243, 2011.
DOI : 10.1161/strokeaha.110.605576

URL : http://stroke.ahajournals.org/content/strokeaha/42/5/1237.full.pdf

S. K. Kim, W. Yoon, T. S. Kim, H. S. Kim, T. W. Heo et al., Histologic Analysis of Retrieved Clots in Acute Ischemic Stroke: Correlation with Stroke Etiology and Gradient-Echo MRI, AJNR Am J Neuroradiol, vol.36, issue.9, pp.1756-62, 2015.

S. Yan, Q. Chen, X. Zhang, M. Xu, Q. Han et al., Extensive blooming artifact predicts no recanalization after intravenous thrombolysis, European Journal of Neurology, 2015.

P. B. Sporns, U. Hanning, W. Schwindt, A. Velasco, J. Minnerup et al., Ischemic Stroke: What Does the Histological Composition Tell Us About the Origin of the Thrombus? Stroke, vol.48, pp.2206-2210, 2017.

R. Zhang, Y. Zhou, C. Liu, M. Zhang, S. Yan et al., Overestimation of Susceptibility Vessel Sign: A Predictive Marker of Stroke Cause, Stroke, vol.48, issue.7, pp.1993-1996, 2017.

D. W. Kang, H. G. Jeong, D. Y. Kim, Y. W. Lee, and S. H. , Prediction of Stroke Subtype and Recanalization Using Susceptibility Vessel Sign on Susceptibility-Weighted Magnetic Resonance Imaging, Stroke, vol.48, issue.6, pp.1554-1559, 2017.

R. Bourcier, Susceptibility Vessel Sign on MRI Predicts Favorable Clinical Outcome in Patients with Anterior Circulation Acute Stroke Treated with Mechanical Thrombectomy, AJNR Am J Neuroradiol, vol.36, pp.2346-2353, 2015.

S. Soize, Susceptibility vessel sign on T2* magnetic resonance imaging and recanalization results of mechanical thrombectomy with stent retrievers: a multicentre cohort study, European Journal of Neurology, vol.22, pp.967-972, 2015.

P. D. Schellinger, J. A. Chalela, D. W. Kang, L. L. Latour, and S. Warach, Diagnostic and prognostic value of early MR imaging vessel signs in hyperacute stroke patients imaged <3 hours and treated with recombinant tissue plasminogen activator, AJNR Am J Neuroradiol, vol.26, pp.618-624, 2005.

H. S. Kim, D. H. Lee, C. G. Choi, S. J. Kim, and D. C. Suh, Progression of middle cerebral artery susceptibility sign on T2*-weighted images: its effect on recanalization and clinical outcome after thrombolysis, AJR Am J Roentgenol, vol.187, pp.650-657, 2006.

V. Puetz, I. Dzialowski, M. D. Hill, S. Subramaniam, P. N. Sylaja et al., Intracranial thrombus extent predicts clinical outcome, final infarct size and hemorrhagic transformation in ischemic stroke: the clot burden score, Int J Stroke, vol.3, issue.4, pp.230-236, 2008.

K. Kimura, Y. Iguchi, K. Shibazaki, M. Watanabe, T. Iwanaga et al., M1 susceptibility vessel sign on T2* as a strong predictor for no early recanalization after IV-t-PA in acute ischemic stroke, Stroke, vol.40, pp.3130-3132, 2009.

K. Kimura, Y. Sakamoto, J. Aoki, Y. Iguchi, K. Shibazaki et al., Clinical and MRI predictors of no early recanalization within 1 hour after tissue-type plasminogen activator administration, Stroke, vol.42, pp.3150-3155, 2011.

S. Soize, C. Barbe, K. Kadziolka, L. Estrade, I. Serre et al., Predictive factors of outcome and hemorrhage after acute ischemic stroke treated by mechanical thrombectomy with a stentretriever, Neuroradiology, vol.55, issue.8, pp.977-87, 2013.

S. Yan, H. Hu, and Z. Shi, Morphology of susceptibility vessel sign predicts middle cerebral artery recanalization after intravenous thrombolysis, Stroke, vol.45, pp.2795-2797, 2014.

W. G. Bradley, MR appearance of hemorrhage in the brain, Radiology, vol.189, pp.15-26, 1993.

T. L. Haque, Y. Miki, and M. Kanagaki, MR contrast of ferritin and hemosiderin in the brain: comparison among gradient-echo, conventional spin-echo and fast spin-echo sequences, Eur J Radiol, vol.48, pp.230-236, 2003.

R. Bourcier, L. Détraz, J. M. Serfaty, B. G. Delasalle, M. Mirza et al., MRI Interscanner Agreement of the Association between the Susceptibility Vessel Sign and Histologic Composition of Thrombi, J Neuroimaging, 2017.

V. J. Marder, D. J. Chute, S. Starkman, A. M. Abolian, C. Kidwell et al., Analysis of thrombi retrieved from cerebral arteries of patients with acute ischemic stroke, Stroke, vol.37, issue.8, pp.2086-93, 2006.

C. Dargazanli, V. Rigau, O. Eker, R. Bareiro, C. Machi et al., High CD3+ cells in intracranial thrombi represent a biomarker of atherothrombotic stroke, PloS One, vol.11, issue.5, p.154945, 2016.
URL : https://hal.archives-ouvertes.fr/hal-01821464

T. Hashimoto, M. Hayakawa, N. Funatsu, H. Yamagami, T. Satow et al., Histopathologic analysis of retrieved thrombi associated with successful reperfusion after acute stroke thrombectomy, Stroke, vol.47, issue.12, pp.3035-3037, 2016.

B. Fuentes, A. De-lecinana, M. , X. -. Carrillo, and A. , Futile interhospital transfer for endovascular treatment in acute ischemic stroke: the Madrid stroke network experience, Stroke, vol.46, pp.2156-61, 2015.
DOI : 10.1161/strokeaha.115.009282

URL : https://www.ahajournals.org/doi/pdf/10.1161/STROKEAHA.115.009282

G. Boulouis, A. Lauer, A. K. Siddiqui, A. Charidimou, R. W. Regenhardt et al., Clinical Imaging Factors Associated With Infarct Progression in Patients With Ischemic Stroke During Transfer for Mechanical Thrombectomy, JAMA Neurol, 2017.
DOI : 10.1001/jamaneurol.2017.2149

URL : https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5710581

I. Y. Tan, A. M. Demchuk, and J. Hopyan, CT angiography clot burden score and collateral score: correlation with clinical and radiologic outcomes in acute middle cerebral artery infarct, AJNR Am J Neuroradiol, vol.30, pp.525-556, 2009.
DOI : 10.3174/ajnr.a1408

URL : http://www.ajnr.org/content/30/3/525.full.pdf

V. Puetz, I. Dzialowski, M. D. Hill, N. Steffenhagen, S. B. Coutts et al.,

C. Calgary and . Group, Malignant profile detected by CT angiographic information predicts poor prognosis despite thrombolysis within three hours from symptom onset, Cerebrovasc Dis, vol.29, pp.584-591, 2010.

N. Sillanpaa, J. T. Saarinen, and H. Rusanen, The clot burden score, the Boston acute stroke imaging scale, the cerebral blood volume aspects, and two novel imaging parameters in the prediction of clinical outcome of ischemic stroke patients receiving intravenous thrombolytic therapy, Neuroradiology, vol.54, pp.663-72, 2012.

E. M. Fanou, J. Knight, and R. I. Aviv, Effect of collaterals on clinical presentation, baseline imaging, complications, and outcome in acute stroke, AJNR Am J Neuroradiol, vol.36, pp.2285-91, 2015.

A. D. Horsch, J. W. Dankbaar, J. M. Niesten, T. Van-seeters, I. C. Van-der-schaaf et al.,

, Dutch Acute Stroke Study Investigators. Predictors of reperfusion in patients with acute ischemic stroke, AJNR Am J Neuroradiol, vol.36, pp.1056-1062, 2015.

S. Yan, Q. Chen, and M. Xu, Thrombus length estimation on delayed gadolinium-enhanced T1, Stroke, vol.47, pp.756-61, 2016.
DOI : 10.1161/strokeaha.115.011401

URL : https://www.ahajournals.org/doi/pdf/10.1161/STROKEAHA.115.011401

K. M. Treurniet, A. J. Yoo, and O. A. Berkhemer, Clot Burden Score on Baseline Computerized Tomographic Angiography and Intra-Arterial Treatment Effect in Acute Ischemic Stroke, MR CLEAN Investigators, vol.47, pp.2972-2978, 2016.
DOI : 10.1161/strokeaha.116.014565

URL : https://www.ahajournals.org/doi/pdf/10.1161/STROKEAHA.116.014565

A. Rovira, P. Orellana, and J. Alvarez-sabín, Hyperacute ischemic stroke: middle cerebral artery susceptibility sign at echo-planar gradient-echo MR imaging, Radiology, vol.232, issue.2, pp.466-73, 2004.
DOI : 10.1148/radiol.2322030273

J. C. Van-swieten, P. J. Koudstaal, M. C. Visser, H. J. Schouten, and J. Van-gijn, Interobserver agreement for the assessment of handicap in stroke patients, Stroke, vol.19, pp.604-611, 1988.

O. O. Zaidat, A. J. Yoo, and P. Khatri, Recommendations on angiographic revascularization grading standards for acute ischemic stroke: a consensus statement, Stroke, vol.44, pp.2650-63, 2013.
DOI : 10.1161/strokeaha.113.001972

URL : https://www.ahajournals.org/doi/pdf/10.1161/STROKEAHA.113.001972

P. A. Barber, A. M. Demchuk, J. Zhang, and A. M. Buchan, Validity and reliability of a quantitative computed tomography score in predicting outcome of hyperacute stroke before thrombolytic therapy, Lancet, vol.355, pp.1670-74, 2000.

R. A. Mctaggart, T. G. Jovin, and M. G. Lansberg, Alberta Stroke Program Early Computed Tomographic Scoring performance in a series of patients undergoing computed tomography and MRI: reader agreement, modality agreement, and outcome prediction, Stroke, vol.46, pp.407-419, 2015.

A. M. Spiotta, J. Vargas, and H. Hawk, Hounsfield unit value and clot length in the acutely occluded vessel and time required to achieve thrombectomy, complications and outcome, J NeuroInterv Surg, vol.6, pp.423-430, 2014.
DOI : 10.1136/neurintsurg-2013-010765

A. M. Demchuk, M. Goyal, S. D. Yeatts, J. Carrozzella, L. D. Foster et al., IMS III Investigators. Recanalization and clinical outcome of occlusion sites at baseline CT angiography in the Interventional Management of Stroke III trial, Radiology, vol.273, pp.202-210, 2014.

M. Mokin, S. Morr, and S. K. Natarajan, Thrombus density predicts successful recanalization with solitaire stent retriever thrombectomy in acute ischemic stroke, J NeuroInterv Surg, vol.7, pp.104-111, 2015.
DOI : 10.1136/neurintsurg-2013-011017

M. Mokin, E. I. Levy, A. H. Siddiqui, M. Goyal, R. G. Nogueira et al., Association of clot burden score with radiographic and clinical outcomes following Solitaire stent retriever thrombectomy: analysis of the SWIFT PRIME trial, J Neurointerv Surg, pp.2016-012631, 2016.

Y. I. Kan, I. Vinuela, and F. , The impact of thromboemboli histology on the performance of a mechanical thrombectomy device, AJNR Am J Neuroradiol, vol.33, issue.4, pp.643-651, 2012.

S. H. Ahn, R. Hong, and J. H. Kim, Histologic features of acute thrombi retrieved from stroke patients during mechanical reperfusion therapy, Int J Stroke, vol.11, issue.9, pp.1036-1044, 2016.
DOI : 10.1177/1747493016641965

W. Brinjikji, S. Duffy, A. Burrows, W. Hacke, and D. Liebeskind, Correlation of imaging and histopathology of thrombi in acute ischemic stroke with etiology and outcome: a systematic review, J Neurointerv Surg, pp.2016-012391, 2016.

M. T. Froehler, S. Tateshima, G. Duckwiler, R. Jahan, N. Gonzalez et al., The hyperdense vessel sign on CT predicts successful recanalization with the Merci device in acute ischemic stroke, J Neurointerv Surg, vol.5, pp.289-293, 2013.

P. Moftakhar, J. D. English, D. L. Cooke, W. T. Kim, C. Stout et al., Density of thrombus on admission CT predicts revascularization efficacy in large vessel occlusion acute ischemic stroke, Stroke, vol.44, pp.243-245, 2013.
DOI : 10.1161/strokeaha.112.674127

URL : https://www.ahajournals.org/doi/pdf/10.1161/STROKEAHA.112.674127

E. M. Santos, J. W. Dankbaar, and K. M. Treurniet, Permeable Thrombi Are Associated With Higher Intravenous Recombinant Tissue-Type Plasminogen Activator Treatment Success in Patients With Acute Ischemic Stroke, DUST Investigators, vol.47, pp.2058-65, 2016.
DOI : 10.1161/strokeaha.116.013306

URL : http://stroke.ahajournals.org/content/strokeaha/47/8/2058.full.pdf

E. M. Santos, H. A. Marquering, M. D. Den-blanken, and O. A. Berkhemer,

, Thrombus Permeability Is Associated With Improved Functional Outcome and Recanalization in Patients With Ischemic Stroke, Stroke, vol.47, issue.3, pp.732-773, 2016.

J. Y. Chueh, A. K. Wakhloo, G. H. Hendricks, C. F. Silva, J. P. Weaver et al., Mechanical characterization of thromboemboli in acute ischemic stroke and laboratory embolus analogs, AJNR Am J Neuroradiol, vol.32, pp.1237-1244, 2011.

C. L. Slaboch, M. S. Alber, and E. D. Rosen, Mechano-rheological properties of the murine thrombus determined via nanoindentation and finite element modeling, J Mech Behav Biomed Mater, vol.10, pp.75-86, 2012.

K. C. Gersh, C. Nagaswami, and J. W. Weisel, Fibrin network structure and clot mechanical properties are altered by incorporation of erythrocytes, Thromb Haemost, vol.102, pp.1169-1175, 2009.

C. H. Riedel, P. Zimmermann, U. Jensen-kondering, R. Stingele, G. Deuschl et al., The importance of size: successful recanalization by intravenous thrombolysis in acute anterior stroke depends on thrombus length, Stroke, vol.42, pp.1775-1777, 2011.

J. Aoki, K. Kimura, and K. Shibazaki, Location of the susceptibility vessel sign on T2*-weighted MRI and early recanalization within 1 hour after tissue plasminogen activator administration, Cerebrovasc Dis Extra, vol.3, pp.111-131, 2013.

V. Rohan, J. Baxa, and R. Tupy, Length of occlusion predicts recanalization and outcome after intravenous thrombolysis in middle cerebral artery stroke, Stroke, vol.45, pp.2010-2017, 2014.

S. Yan, K. Liu, L. Tong, Y. Yu, S. Zhang et al., Different risk factors for poor outcome between patients with positive and negative susceptibility vessel sign, J Neurointerv Surg, vol.8, issue.10, pp.1001-1006, 2016.

C. Weisstanner, P. P. Gratz, G. Schroth, R. K. Verma, A. Köchl et al., Thrombus imaging in acute stroke: correlation of thrombus length on susceptibility-weighted imaging with endovascular reperfusion success, Eur Radiol, vol.24, pp.1735-1741, 2014.

Y. J. Bae, C. Jung, J. H. Kim, B. S. Choi, E. Kim et al., Potential for the use of the Solitaire stent for recanalization of middle cerebral artery occlusion without a susceptibility vessel sign, AJNR Am J Neuroradiol, vol.35, issue.1, pp.149-55, 2014.

M. Saqqur, K. Uchino, and A. M. Demchuk, Site of arterial occlusion identified by transcranial Doppler predicts the response to intravenous thrombolysis for stroke, Stroke, vol.38, pp.948-954, 2007.

A. J. Yoo, P. Khatri, J. Mocco, O. O. Zaidat, R. Gupta et al., THERAPY Trial Investigators. Impact of Thrombus Length on Outcomes After Intra-Arterial Aspiration Thrombectomy in the THERAPY Trial. Stroke, vol.48, issue.7, pp.1895-1900, 2017.

J. Borst, O. A. Berkhemer, E. Santos, A. J. Yoo, M. Den-blanken et al.,

M. R. Clean, Value of Thrombus CT Characteristics in Patients with Acute Ischemic Stroke, AJNR Am J Neuroradiol, vol.38, issue.9, pp.1758-1764, 2017.

A. M. Mortimer, D. H. Little, K. S. Minhas, E. R. Walton, S. A. Renowden et al., Thrombus length estimation in acute ischemic stroke: a potential role for delayed contrast enhanced CT, J Neurointerv Surg, vol.6, pp.244-248, 2014.
DOI : 10.1136/neurintsurg-2013-010769

I. N. Kaschka, S. P. Kloska, T. Struffert, T. Engelhorn, P. Gölitz et al., Clot Burden and Collaterals in Anterior Circulation Stroke: Differences Between Single-Phase CTA and Multi-phase 4DCTA, Clin Neuroradiol, vol.26, issue.3, pp.309-315, 2016.
DOI : 10.1007/s00062-014-0359-6

A. M. Frölich, D. Schrader, E. Klotz, R. Schramm, K. Wasser et al., 4D CT angiography more closely defines intracranial thrombus burden than single-phase CT angiography, AJNR Am J Neuroradiol, vol.34, pp.1908-1913, 2013.

C. H. Riedel, U. Jensen, A. Rohr, M. Tietke, K. Alfke et al., Assessment of thrombus in acute middle cerebral artery occlusion using thin-slice nonenhanced computed tomography reconstructions, Stroke, vol.41, pp.1659-1664, 2010.

P. P. Gratz, G. Schroth, J. Gralla, H. P. Mattle, U. Fischer et al., Wholebrain susceptibilityweighted thrombus imaging in stroke: fragmented thrombi predict worse outcome, AJNR Am J Neuroradiol, vol.36, pp.1277-1282, 2015.
DOI : 10.3174/ajnr.a4275

URL : http://www.ajnr.org/content/36/7/1277.full.pdf

N. Menjot-de-champfleur, J. L. Saver, M. Goyal, R. Jahan, H. C. Diener et al., Efficacy of Stent-Retriever Thrombectomy in Magnetic Resonance Imaging Versus Computed Tomographic Perfusion-Selected Patients in SWIFT PRIME Trial (Solitaire FR With the Intention for Thrombectomy as Primary Endovascular Treatment for Acute Ischemic Stroke), Stroke, vol.48, issue.6, pp.1560-1566, 2017.

F. Fazekas, J. B. Chawluk, and A. Alavi, MR signal abnormalities at 1·5 T in Alzheimer?s dementia and normal aging, AJR Am J Roentgenol, vol.149, pp.351-56, 1987.
DOI : 10.2214/ajr.149.2.351

A. C. Flint, S. P. Cullen, and V. A. Rao, The THRIVE score strongly predicts outcomes in patients treated with the Solitaire device in the SWIFT and STAR trials, Int J, vol.9, pp.698-704, 2014.

G. Turc, M. Apoil, and O. Naggara, Magnetic resonance imaging DRAGON score: 3-month outcome prediction after intravenous thrombolysis for anterior circulation stroke, Stroke, vol.44, pp.1323-1351, 2013.

G. Turc, P. Aguettaz, and N. Ponchelle-dequatre, External validation of the MRI-DRAGON score: early prediction of stroke outcome after intravenous thrombolysis, PLoS One, vol.9, p.99164, 2014.

R. Bourcier, N. Brecheteau, V. Costalat, B. Daumas-duport, B. Guyomarch-delasalle et al., MRI quantitative T2* mapping on thrombus to predict recanalization after endovascular treatment for acute anterior ischemic stroke, J Neuroradiol, vol.44, issue.4, pp.241-246, 2017.
DOI : 10.1016/j.neurad.2017.03.006

URL : https://hal.archives-ouvertes.fr/hal-01761877

E. Spuentrup, R. M. Botnar, A. J. Wiethoff, T. Ibrahim, S. Kelle et al., MR imaging of thrombi using EP-2104R, a fibrin-specific contrast agent: Initial results in patients, Eur Radiol, vol.18, pp.1995-2005, 2008.

R. Uppal, C. Catana, I. Ay, T. Benner, A. G. Sorensen et al., Bimodal thrombus imaging: Simultaneous PET/MR imaging with a fibrin-targeted dual PET/MR probe: Feasibility study in rat model, Radiology, vol.258, pp.812-832, 2011.
DOI : 10.1148/radiol.10100881

URL : https://pubs.rsna.org/doi/pdf/10.1148/radiol.10100881

H. Achit, M. Soudant, K. Hosseini, A. Bannay, J. Epstein et al., Cost-Effectiveness of Thrombectomy in Patients With Acute Ischemic Stroke: The THRACE Randomized Controlled Trial, Stroke, vol.48, issue.10, pp.2843-284, 2017.

, Figure 2. The Alberta Stroke Programme Early CT Score (ASPECTS)

, A=anterior circulation; P=posterior circulation; C=caudate; L=lentiform

, I=insular ribbon; MCA=middle cerebral artery

, M1=anterior MCA cortex; M2=MCA cortex lateral to insular ribbon

M. M3=posterior,

M. M4, lateral, and posterior MCA territories immediately superior to M1, M2, and M3, rostral to basal ganglia. Score allows deductions based on occupancy of lesion in each of 10 ASPECTS regions

C. , L. , and I. C. , MCA cortex is allotted 7 points

F. Barber, P. A. Demchuk, A. M. Zhang, J. Buchan, and A. M. , Validity and reliability of a quantitative computed tomography score in predicting outcome of hyperacute stroke before thrombolytic therapy, ASPECTS Study Group. Alberta Stroke Programme Early CT Score. Lancet, vol.355, pp.1670-1674, 2000.