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van Voorst H, Hoving JW, Koopman MS, Daems JD, Peerlings D, Buskens E, Lingsma H, Marquering HA, de Jong HWAM, Berkhemer OA, van Zwam WH, van Walderveen MAA, van den Wijngaard IR, Dippel DWJ, Yoo AJ, Campbell B, Kunz WG, Majoie CB, Emmer BJ. Costs and health effects of CT perfusion-based selection for endovascular thrombectomy within 6 hours of stroke onset: a model-based health economic evaluation. J Neurol Neurosurg Psychiatry 2024; 95:515-527. [PMID: 38124162 DOI: 10.1136/jnnp-2023-331862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 11/19/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Although CT perfusion (CTP) is often incorporated in acute stroke workflows, it remains largely unclear what the associated costs and health implications are in the long run of CTP-based patient selection for endovascular treatment (EVT) in patients presenting within 6 hours after symptom onset with a large vessel occlusion. METHODS Patients with a large vessel occlusion were included from a Dutch nationwide cohort (n=703) if CTP imaging was performed before EVT within 6 hours after stroke onset. Simulated cost and health effects during 5 and 10 years follow-up were compared between CTP based patient selection for EVT and providing EVT to all patients. Outcome measures were the net monetary benefit at a willingness-to-pay of €80 000 per quality-adjusted life year, incremental cost-effectiveness ratio), difference in costs from a healthcare payer perspective (ΔCosts) and quality-adjusted life years (ΔQALY) per 1000 patients for 1000 model iterations as outcomes. RESULTS Compared with treating all patients, CTP-based selection for EVT at the optimised ischaemic core volume (ICV≥110 mL) or core-penumbra mismatch ratio (MMR≤1.4) thresholds resulted in losses of health (median ΔQALYs for ICV≥110 mL: -3.3 (IQR: -5.9 to -1.1), for MMR≤1.4: 0.0 (IQR: -1.3 to 0.0)) with median ΔCosts for ICV≥110 mL of -€348 966 (IQR: -€712 406 to -€51 158) and for MMR≤1.4 of €266 513 (IQR: €229 403 to €380 110)) per 1000 patients. Sensitivity analyses did not yield any scenarios for CTP-based selection of patients for EVT that were cost-effective for improving health, including patients aged ≥80 years CONCLUSION: In EVT-eligible patients presenting within 6 hours after symptom onset, excluding patients based on CTP parameters was not cost-effective and could potentially harm patients.
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Affiliation(s)
- Henk van Voorst
- Department of Radiology and Nuclear Medicine, Amsterdam UMC Location AMC, Amsterdam, North Holland, The Netherlands
- Department of Biomedical Engineering and Physics, Amsterdam UMC location University of Amsterdam, Amsterdam, The Netherlands
| | - Jan W Hoving
- Department of Radiology and Nuclear Medicine, Amsterdam UMC Location AMC, Amsterdam, North Holland, The Netherlands
| | - Miou S Koopman
- Department of Radiology and Nuclear Medicine, Amsterdam UMC Location AMC, Amsterdam, North Holland, The Netherlands
| | - Jasper D Daems
- Department of Neurology, Erasmus University Medical Center, Rotterdam, The Netherlands
- Department of Public Health, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Daan Peerlings
- Department of Radiology, University Medical Center Utrecht, Utrecht, Utrecht, The Netherlands
| | - Erik Buskens
- Epidemiology, University Medical Centre Groningen, Groningen, Groningen, The Netherlands
| | - Hester Lingsma
- Public Health, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - Henk A Marquering
- Department of Radiology and Nuclear Medicine, Amsterdam UMC Location AMC, Amsterdam, North Holland, The Netherlands
- Biomedical Engineering and Physics, Amsterdam UMC Location AMC, Amsterdam, North Holland, The Netherlands
| | | | - Olvert A Berkhemer
- Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, The Netherlands
- Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Wim H van Zwam
- Radiology, Maastricht University Medical Center, Maastricht, The Netherlands
| | | | - Ido R van den Wijngaard
- Neurology, HMC Westeinde, The Hague, Zuid-Holland, The Netherlands
- Neurology, Leiden University, Leiden, The Netherlands
| | | | - Albert J Yoo
- Neurointervention, Texas Stroke Institute, Plano, Texas, USA
| | - Bruce Campbell
- The Royal Melbourne Hospital, Parkville, Melbourne, Australia
| | | | - Charles B Majoie
- Department of Radiology and Nuclear Medicine, Amsterdam UMC Location AMC, Amsterdam, North Holland, The Netherlands
| | - Bart J Emmer
- Department of Radiology and Nuclear Medicine, Amsterdam UMC Location AMC, Amsterdam, North Holland, The Netherlands
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Kits A, Al-Saadi J, De Luca F, Janzon F, Mazya MV, Lundberg J, Sprenger T, Skare S, Delgado AF. 2.5-Minute Fast Brain MRI with Multiple Contrasts in Acute Ischemic Stroke. Neuroradiology 2024; 66:737-747. [PMID: 38462584 PMCID: PMC11031482 DOI: 10.1007/s00234-024-03331-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Accepted: 03/04/2024] [Indexed: 03/12/2024]
Abstract
PURPOSE To assess the performance of a 2.5-minute multi-contrast brain MRI sequence (NeuroMix) in diagnosing acute cerebral infarctions. METHODS Adult patients with a clinical suspicion of acute ischemic stroke were retrospectively included. Brain MRI at 3 T included NeuroMix and routine clinical MRI (cMRI) sequences, with DWI/ADC, T2-FLAIR, T2-weighted, T2*, SWI-EPI, and T1-weighted contrasts. Three radiologists (R1-3) independently assessed NeuroMix and cMRI for the presence of acute infarcts (DWI ↑, ADC = or ↓) and infarct-associated abnormalities on other image contrasts. Sensitivity, specificity, and the area under the receiver operating characteristic curve (AUC) were calculated and compared using DeLong's test. Inter- and intra-rater agreements were studied with kappa statistics. Relative DWI (rDWI) and T2-FLAIR (rT2-FLAIR) signal intensity for infarctions were semi-automatically rendered, and the correlation between methods was evaluated. RESULTS According to the reference standard, acute infarction was present in 34 out of 44 (77%) patients (63 ± 17 years, 31 men). Other infarct-associated signal abnormalities were reported in similar frequencies on NeuroMix and cMRI (p > .08). Sensitivity for infarction detection was 94%, 100%, and 94% evaluated by R1, R2, R3, for NeuroMix and 94%, 100%, and 100% for cMRI. Specificity was 100%, 90%, and 100% for NeuroMix and 100%, 100%, and 100% for cMRI. AUC for NeuroMix was .97, .95, and .97 and .97, 1, and 1 for cMRI (DeLong p = 1, .32, .15), respectively. Inter- and intra-rater agreement was κ = .88-1. The correlation between NeuroMix and cMRI was R = .73 for rDWI and R = .83 for rT2-FLAIR. CONCLUSION Fast multi-contrast MRI NeuroMix has high diagnostic performance for detecting acute cerebral infarctions.
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Affiliation(s)
- Annika Kits
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden.
- Department of Neuroradiology, Karolinska University Hospital, Solna, 17176, Stockholm, Sweden.
| | - Jonathan Al-Saadi
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Department of Neuroradiology, Karolinska University Hospital, Solna, 17176, Stockholm, Sweden
| | - Francesca De Luca
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Department of Neuroradiology, Karolinska University Hospital, Solna, 17176, Stockholm, Sweden
- Department of Radiology, Karolinska University Hospital, Stockholm, Sweden
| | - Fredrik Janzon
- Department of Neuroradiology, Karolinska University Hospital, Solna, 17176, Stockholm, Sweden
- Department of Radiology, Danderyd Hospital, Stockholm, Sweden
| | - Michael V Mazya
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Department of Neurology, Karolinska University Hospital, Stockholm, Sweden
| | - Johan Lundberg
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Department of Neuroradiology, Karolinska University Hospital, Solna, 17176, Stockholm, Sweden
| | - Tim Sprenger
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- MR Applied Science Laboratory Europe, GE Healthcare, Stockholm, Sweden
| | - Stefan Skare
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Department of Neuroradiology, Karolinska University Hospital, Solna, 17176, Stockholm, Sweden
| | - Anna Falk Delgado
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
- Department of Neuroradiology, Karolinska University Hospital, Solna, 17176, Stockholm, Sweden
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3
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Fainardi E, Busto G, Morotti A. Automated advanced imaging in acute ischemic stroke. Certainties and uncertainties. Eur J Radiol Open 2023; 11:100524. [PMID: 37771657 PMCID: PMC10523426 DOI: 10.1016/j.ejro.2023.100524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 09/12/2023] [Accepted: 09/13/2023] [Indexed: 09/30/2023] Open
Abstract
The purpose of this is study was to review pearls and pitfalls of advanced imaging, such as computed tomography perfusion and diffusion-weighed imaging and perfusion-weighted imaging in the selection of acute ischemic stroke (AIS) patients suitable for endovascular treatment (EVT) in the late time window (6-24 h from symptom onset). Advanced imaging can quantify infarct core and ischemic penumbra using specific threshold values and provides optimal selection parameters, collectively called target mismatch. More precisely, target mismatch criteria consist of core volume and/or penumbra volume and mismatch ratio (the ratio between total hypoperfusion and core volumes) with precise cut-off values. The parameters of target mismatch are automatically calculated with dedicated software packages that allow a quick and standardized interpretation of advanced imaging. However, this approach has several limitations leading to a misclassification of core and penumbra volumes. In fact, automatic software platforms are affected by technical artifacts and are not interchangeable due to a remarkable vendor-dependent variability, resulting in different estimate of target mismatch parameters. In addition, advanced imaging is not completely accurate in detecting infarct core, that can be under- or overestimated. Finally, the selection of candidates for EVT remains currently suboptimal due to the high rates of futile reperfusion and overselection caused by the use of very stringent inclusion criteria. For these reasons, some investigators recently proposed to replace advanced with conventional imaging in the selection for EVT, after the demonstration that non-contrast CT ASPECTS and computed tomography angiography collateral evaluation are not inferior to advanced images in predicting outcome in AIS patients treated with EVT. However, other authors confirmed that CTP and PWI/DWI postprocessed images are superior to conventional imaging in establishing the eligibility of patients for EVT. Therefore, the routine application of automatic assessment of advanced imaging remains a matter of debate. Recent findings suggest that the combination of conventional and advanced imaging might improving our selection criteria.
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Affiliation(s)
- Enrico Fainardi
- Neuroradiology Unit, Department of Experimental and Clinical Biomedical Sciences, University of Florence, Italy
- Neuroradiology Unit, Department of Radiology, Careggi University Hospital, Florence, Italy
| | - Giorgio Busto
- Neuroradiology Unit, Department of Radiology, Careggi University Hospital, Florence, Italy
| | - Andrea Morotti
- Department of Neurological and Vision Sciences, Neurology Unit, ASST Spedali Civili, Brescia, Italy
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Sun D, Huo X, Raynald, Mo D, Gao F, Ma N, Albers GW, Miao Z. Outcome prediction value of critical area perfusion score for acute basilar artery occlusion. Interv Neuroradiol 2023; 29:702-709. [PMID: 36112757 PMCID: PMC10680966 DOI: 10.1177/15910199221125853] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 08/25/2022] [Indexed: 11/29/2023] Open
Abstract
PURPOSE To investigate the performance of the Critical Area Perfusion Score (CAPS), based on computed tomography perfusion (CTP) time to maximum (Tmax) > 10s maps, to predict the outcome in acute basilar artery occlusion (BAO) in patients undergoing endovascular treatment (EVT). METHODS We perform a retrospective analysis of a prospectively collected database of acute BAO treated with EVT in a comprehensive stroke center. The favorable outcome was defined as the 90-day modified Rankin Scale (mRS) ≤ 3. We performed the logistic regression analysis to find the independent predictors of the favorable outcome. Then, we used receiver operating characteristic analyses to assess the predictive value of the imaging parameters, including CAPS, Posterior Circulation Alberta Stroke Program Early CT Score (PC-ASPECTS), pons midbrain index (PMI), posterior circulation computed tomography angiography (PC-CTA) score, Basilar Artery on Computed Tomography Angiography (BATMAN) score, and CTP parameters. Finally, the Delong test was used to compare the area under the curve (AUC) of CAPS against the other imaging parameters. RESULTS Of the 65 enrolled patients, the incidence of the favorable outcome was 44.6% (29/65). Low CAPS (per 1- point increased odds ratio [OR], 0.43; 95% confidence interval [CI], 0.22-0.86; P = 0.017) and admission National Institutes of Health Stroke Scale (NIHSS) (per 1- point increased OR, 0.80; 95% CI, 0.70-0.91; P = 0.001) were independently associated with favorable outcome. The AUC of CAPS was 0.83 (95% CI, 0.74-0.93; P < 0.001) with ≤ 3 cut-off value, 89.66% sensitivity, 77.22% specificity, and 80.00% accuracy, which was greater than the other imaging parameters (All P for Delong test < 0.05). CONCLUSIONS CAPS was the most accurate imaging-based outcome predictor in acute BAO patients. Future large prospective multicenter studies are needed to verify these results.
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Affiliation(s)
- Dapeng Sun
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Xiaochuan Huo
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Raynald
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Dapeng Mo
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Feng Gao
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Ning Ma
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Gregory W Albers
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA
| | - Zhongrong Miao
- Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
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5
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Vlegels N, Gonzalez-Ortiz F, Knuth NL, Khalifeh N, Gesierich B, Müller F, Müller P, Klein M, Dimitriadis K, Franzmeier N, Liebig T, Duering M, Reidler P, Dichgans M, Karikari TK, Blennow K, Tiedt S. Brain-derived Tau for Monitoring Brain Injury in Acute Ischemic Stroke. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.11.18.23298728. [PMID: 38014197 PMCID: PMC10680879 DOI: 10.1101/2023.11.18.23298728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
The evolution of infarcts varies widely among patients with acute ischemic stroke (IS) and influences treatment decisions. Neuroimaging is not applicable for frequent monitoring and there is no blood-based biomarker to track ongoing brain injury in acute IS. Here, we examined the utility of plasma brain-derived tau (BD-tau) as a biomarker for brain injury in acute IS. We conducted the prospective, observational Precision Medicine in Stroke [PROMISE] study with serial blood sampling upon hospital admission and at days 2, 3, and 7 in patients with acute ischemic stroke (IS) and for comparison, in patients with stroke mimics (SM). We determined the temporal course of plasma BD-tau, its relation to infarct size and admission imaging-based metrics of brain injury, and its value to predict functional outcome. Upon admission (median time-from-onset, 4.4h), BD-tau levels in IS patients correlated with ASPECTS (ρ=-0.21, P<.0001) and were predictive of final infarct volume (ρ=0.26, P<.0001). In contrast to SM patients, BD-tau levels in IS patients increased from admission (median, 2.9 pg/ml [IQR, 1.8-4.8]) to day 2 (median time-from-onset, 22.7h; median BD-tau, 5.0 pg/ml [IQR, 2.6-10.3]; P<.0001). The rate of change of BD-tau from admission to day 2 was significantly associated with collateral supply (R2=0.10, P<.0001) and infarct progression (ρ=0.58, P<.0001). At day 2, BD-tau was predictive of final infarct volume (ρ=0.59, P<.0001) and showed superior value for predicting the 90-day mRS score compared with final infarct volume. In conclusion, in 502 patients with acute IS, plasma BD-tau was associated with imaging-based metrics of brain injury upon admission, increased within the first 24 hours in correlation with infarct progression, and at 24 hours was superior to final infarct volume in predicting 90-day functional outcome. Further research is needed to determine whether BD-tau assessments can inform decision-making in stroke care.
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Affiliation(s)
- Naomi Vlegels
- Institute for Stroke and Dementia Research (ISD), LMU University Hospital, LMU Munich, Germany
| | - Fernando Gonzalez-Ortiz
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, the Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
- Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| | - Nicoló Luca Knuth
- Institute for Stroke and Dementia Research (ISD), LMU University Hospital, LMU Munich, Germany
| | - Nada Khalifeh
- Institute for Stroke and Dementia Research (ISD), LMU University Hospital, LMU Munich, Germany
| | - Benno Gesierich
- Institute for Stroke and Dementia Research (ISD), LMU University Hospital, LMU Munich, Germany
- Medical Image Analysis Center (MIAC) and Department of Biomedical Engineering, University of Basel, Basel, Switzerland
| | - Franziska Müller
- Department of Radiology, LMU University Hospital, LMU Munich, Germany
| | - Philipp Müller
- Department of Radiology, LMU University Hospital, LMU Munich, Germany
| | - Matthias Klein
- Department of Neurology, LMU University Hospital, LMU Munich, Germany
| | | | - Nicolai Franzmeier
- Institute for Stroke and Dementia Research (ISD), LMU University Hospital, LMU Munich, Germany
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, the Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Thomas Liebig
- Institute of Neuroradiology, LMU University Hospital, LMU Munich, Germany
| | - Marco Duering
- Institute for Stroke and Dementia Research (ISD), LMU University Hospital, LMU Munich, Germany
- Medical Image Analysis Center (MIAC) and Department of Biomedical Engineering, University of Basel, Basel, Switzerland
| | - Paul Reidler
- Department of Radiology, LMU University Hospital, LMU Munich, Germany
| | - Martin Dichgans
- Institute for Stroke and Dementia Research (ISD), LMU University Hospital, LMU Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
- German Center for Neurodegenerative Diseases (DZNE, Munich), Munich, Germany
- German Centre for Cardiovascular Research (DZHK, Munich), Munich, Germany
| | - Thomas K Karikari
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, the Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, USA
| | - Kaj Blennow
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, the Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
- Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| | - Steffen Tiedt
- Institute for Stroke and Dementia Research (ISD), LMU University Hospital, LMU Munich, Germany
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Koopman MS, Hoving JW, Tolhuisen ML, Jin P, Thiele FO, Bremer-van der Heiden L, van Voorst H, Berkhemer OA, Coutinho JM, Beenen LFM, Marquering HA, Emmer BJ, Majoie CBLM. Accuracy of Four Different CT Perfusion Thresholds for Ischemic Core Volume and Location Estimation Using IntelliSpace Portal. J Cardiovasc Dev Dis 2023; 10:239. [PMID: 37367404 PMCID: PMC10299344 DOI: 10.3390/jcdd10060239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/28/2023] Open
Abstract
Computed tomography perfusion (CTP) is frequently used in the triage of ischemic stroke patients for endovascular thrombectomy (EVT). We aimed to quantify the volumetric and spatial agreement of the CTP ischemic core estimated with different thresholds and follow-up MRI infarct volume on diffusion-weighted imaging (DWI). Patients treated with EVT between November 2017 and September 2020 with available baseline CTP and follow-up DWI were included. Data were processed with Philips IntelliSpace Portal using four different thresholds. Follow-up infarct volume was segmented on DWI. In 55 patients, the median DWI volume was 10 mL, and median estimated CTP ischemic core volumes ranged from 10-42 mL. In patients with complete reperfusion, the intraclass correlation coefficient (ICC) showed moderate-good volumetric agreement (range 0.55-0.76). A poor agreement was found for all methods in patients with successful reperfusion (ICC range 0.36-0.45). Spatial agreement (median Dice) was low for all four methods (range 0.17-0.19). Severe core overestimation was most frequently (27%) seen in Method 3 and patients with carotid-T occlusion. Our study shows moderate-good volumetric agreement between ischemic core estimates for four different thresholds and subsequent infarct volume on DWI in EVT-treated patients with complete reperfusion. The spatial agreement was similar to other commercially available software packages.
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Affiliation(s)
- Miou S Koopman
- Department of Radiology and Nuclear Medicine, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Jan W Hoving
- Department of Radiology and Nuclear Medicine, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Manon L Tolhuisen
- Department of Biomedical Engineering and Physics, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Peng Jin
- Philips Medical Systems, Philips Healthcare, 5684 PC Best, The Netherlands
| | - Frank O Thiele
- Philips GmbH Innovative Technologies, 52074 Aachen, Germany
| | | | - Henk van Voorst
- Department of Biomedical Engineering and Physics, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Olvert A Berkhemer
- Department of Radiology and Nuclear Medicine, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Jonathan M Coutinho
- Department of Neurology, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Ludo F M Beenen
- Department of Radiology and Nuclear Medicine, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Henk A Marquering
- Department of Biomedical Engineering and Physics, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Bart J Emmer
- Department of Radiology and Nuclear Medicine, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Charles B L M Majoie
- Department of Radiology and Nuclear Medicine, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
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7
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Otgonbaatar C, Lee JY, Jung KH, Hwang I, Yoo RE, Kang KM, Yun TJ, Choi SH, Kim JH, Sohn CH. Quantifying infarct core volume in ischemic stroke: What is the optimal threshold and parameters of computed tomography perfusion? J Stroke Cerebrovasc Dis 2023; 32:107062. [PMID: 36948076 DOI: 10.1016/j.jstrokecerebrovasdis.2023.107062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 02/03/2023] [Accepted: 02/20/2023] [Indexed: 03/22/2023] Open
Abstract
OBJECTIVE Although computed tomography perfusion (CTP) is used to select and guide decision-making processes in patients with acute ischemic stroke, there is no clear standardization of the optimal threshold to predict ischemic core volume accurately. The infarct core volume with a relative cerebral blood flow(rCBF) threshold of < 30% is commonly used. We aimed to assess the volumetric agreement of the infarct core volume with different CTP parameters and thresholds using CTP software (RAPID, VITREA) and the infarct volume on diffusion-weighted imaging (DWI), with a short interval time (within 60 min) between CTP and follow-up DWI. MATERIALS AND METHODS This retrospective study included 42 acute ischemic stroke patients with occlusion of the large artery in the anterior circulation between April 2017-November 2020. RAPID identified infarct core as tissue rCBF < 20-38%. VITREA defined the infarct core as cerebral blood volume (CBV) < 26-56%. Olea Sphere was used to measure infarct core volume on DWI. The CTP-infarct core volume with different thresholds of perfusion parameters (CBF threshold vs CBV threshold) were compared with DWI-infarct core volumes. RESULTS The median time between CTP and DWI was 37.5min. The commonly used threshold of CBV< 41% (4.3 mL) resulted in lower median infarct core volume difference compared to the commonly used thresholds of rCBF < 30% (8.2mL). On the other hand, the optimal thresholds of CBV < 26% (-1.0mL; 95% CI, -53.9 to 58.1 mL; 0.945) resulted in the lowest median infarct core volume difference, narrowest limits of agreement, and largest interclass correlation coefficient compared with the optimal thresholds of rCBF < 38% (4.9 mL; 95% CI, -36.4 to 62.9 mL; 0.939). CONCLUSION Our study found that the both optimal and commonly used thresholds of CBV provided a more accurate prediction of the infarct core volume in patients with AIS than rCBF.
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Affiliation(s)
| | - Ji Ye Lee
- Department of Radiology, Seoul National University Hospital, #101 Daehangno, Jongno-gu, Seoul 110-744, Republic of Korea
| | - Keun-Hwa Jung
- Department of Neurology, Seoul National University Hospital, Seoul, Republic of Korea
| | - Inpyeong Hwang
- Department of Radiology, Seoul National University Hospital, #101 Daehangno, Jongno-gu, Seoul 110-744, Republic of Korea
| | - Roh-Eul Yoo
- Department of Radiology, Seoul National University Hospital, #101 Daehangno, Jongno-gu, Seoul 110-744, Republic of Korea
| | - Koung Mi Kang
- Department of Radiology, Seoul National University Hospital, #101 Daehangno, Jongno-gu, Seoul 110-744, Republic of Korea
| | - Tae Jin Yun
- Department of Radiology, Seoul National University Hospital, #101 Daehangno, Jongno-gu, Seoul 110-744, Republic of Korea
| | - Seung Hong Choi
- Department of Radiology, College of Medicine, Seoul National University, Seoul, Republic of Korea; Department of Radiology, Seoul National University Hospital, #101 Daehangno, Jongno-gu, Seoul 110-744, Republic of Korea
| | - Ji-Hoon Kim
- Department of Radiology, College of Medicine, Seoul National University, Seoul, Republic of Korea; Department of Radiology, Seoul National University Hospital, #101 Daehangno, Jongno-gu, Seoul 110-744, Republic of Korea
| | - Chul-Ho Sohn
- Department of Radiology, College of Medicine, Seoul National University, Seoul, Republic of Korea; Department of Radiology, Seoul National University Hospital, #101 Daehangno, Jongno-gu, Seoul 110-744, Republic of Korea.
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8
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Ischemic Lesion Growth in Patients with a Persistent Target Mismatch After Large Vessel Occlusion. Clin Neuroradiol 2023; 33:41-48. [PMID: 35789284 PMCID: PMC10014761 DOI: 10.1007/s00062-022-01180-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 05/11/2022] [Indexed: 11/03/2022]
Abstract
BACKGROUND Failure to reperfuse a cerebral occlusion resulting in a persistent penumbral pattern has not been fully described. METHODS We retrospectively reviewed patients with anterior large vessel occlusion who did not receive reperfusion, and underwent repeated perfusion imaging, with baseline imaging < 6 h after onset and follow-up scans from 16-168 h. A persistent target mismatch (PTM) was defined as core volume of < 100 mL, mismatch ratio > 1.2, and mismatch volume > 10 mL on follow-up imaging. Patients were divided into PTM or non-PTM groups. Ischemic core and penumbral volumes were compared between baseline and follow-up imaging between the two groups, and collateral flow status assessed using CT perfusion collateral index. RESULTS A total of 25 patients (14 PTM and 11 non-PTM) were enrolled in the study. Median core volumes increased slightly in the PTM group, from 22 to 36 ml. There was a much greater increase in the non-PTM group, from 57 to 190 ml. Penumbral volumes were stable in the PTM group from a median of 79 ml at baseline to 88 ml at follow-up, whereas penumbra was reduced in the non-PTM group, from 120 to 0 ml. Collateral flow status was also better in the PTM group and the median collateral index was 33% compared with 44% in the non-PTM group (p = 0.043). CONCLUSION Multiple patients were identified with limited core growth and large penumbra (persistent target mismatch) > 16 h after stroke onset, likely due to more favorable collateral flow.
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López-Rueda A, Ibáñez Sanz L, Alonso de Leciñana M, de Araújo Martins-Romeo D, Vicente Bartulos A, Castellanos Rodrigo M, Oleaga Zufiria L. Recommendations on the use of computed tomography in the stroke code: Consensus document SENR, SERAU, GEECV-SEN, SERAM. RADIOLOGIA 2023; 65:180-191. [PMID: 37059583 DOI: 10.1016/j.rxeng.2022.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 11/18/2022] [Indexed: 03/31/2023]
Abstract
The Spanish Society of Emergency Radiology (SERAU), the Spanish Society of Neuroradiology (SENR), the Spanish Society of Neurology through its Cerebrovascular Diseases Study Group (GEECV-SEN) and the Spanish Society of Medical Radiology (SERAM) have met to draft this consensus document that will review the use of computed tomography in the stroke code patients, focusing on its indications, the technique for its correct acquisition and the possible interpretation mistakes.
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Affiliation(s)
- A López-Rueda
- Sección Radiología Vascular e Intervencionista, Hospital Clínic, Barcelona, Spain.
| | - L Ibáñez Sanz
- Radiología de Urgencias, Hospital 12 de Octubre, Madrid, Spain
| | - M Alonso de Leciñana
- Servicio de Neurología y Centro de Ictus, Instituto para la Investigación biomédica-Hospital Universitario la Paz (IdiPAZ), Universidad Autónoma de Madrid, Madrid, Spain
| | | | - A Vicente Bartulos
- Sección de Radiología de Urgencias, Hospital Universitario Ramón y Cajal, Madrid, Spain
| | - M Castellanos Rodrigo
- Servicio de Neurología, Complejo Hospitalario Universitario A Coruña, A Coruña, Spain
| | - L Oleaga Zufiria
- Sección Radiología Vascular e Intervencionista, Hospital Clínic, Barcelona, Spain
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10
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Kargiotis O, Psychogios K, Safouris A, Andrikopoulou A, Eleftheriou A, Spiliopoulos S, Magoufis G, Tsivgoulis G. Computed Tomography Perfusion Imaging in Acute Ischemic Stroke: Accurate Interpretation Matters. Stroke 2023; 54:e104-e108. [PMID: 36756889 DOI: 10.1161/strokeaha.122.041117] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Affiliation(s)
- Odysseas Kargiotis
- Stroke Unit, Metropolitan Hospital, Piraeus, Greece (O.K., K.P., A.S., A.A., A.E., G.M.)
| | - Klearchos Psychogios
- Stroke Unit, Metropolitan Hospital, Piraeus, Greece (O.K., K.P., A.S., A.A., A.E., G.M.)
| | - Apostolos Safouris
- Stroke Unit, Metropolitan Hospital, Piraeus, Greece (O.K., K.P., A.S., A.A., A.E., G.M.).,Second Department of Neurology, National and Kapodistrian University of Athens, "Attikon" University Hospital, Greece (A.S., A.E., G.T.)
| | - Athina Andrikopoulou
- Stroke Unit, Metropolitan Hospital, Piraeus, Greece (O.K., K.P., A.S., A.A., A.E., G.M.)
| | - Andreas Eleftheriou
- Stroke Unit, Metropolitan Hospital, Piraeus, Greece (O.K., K.P., A.S., A.A., A.E., G.M.).,Second Department of Neurology, National and Kapodistrian University of Athens, "Attikon" University Hospital, Greece (A.S., A.E., G.T.)
| | - Stavros Spiliopoulos
- Second Department of Radiology, Interventional Radiology Unit, "Attikon" University Hospital, Athens, Greece (S.S.)
| | - Georgios Magoufis
- Stroke Unit, Metropolitan Hospital, Piraeus, Greece (O.K., K.P., A.S., A.A., A.E., G.M.)
| | - Georgios Tsivgoulis
- Second Department of Neurology, National and Kapodistrian University of Athens, "Attikon" University Hospital, Greece (A.S., A.E., G.T.)
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11
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López-Rueda A, Ibáñez Sanz L, Alonso de Leciñana M, de Araújo Martins-Romeo D, Vicente Bartulos A, Castellanos Rodrigo M, Oleaga Zufiria L. Recomendaciones sobre el uso de la tomografía computarizada en el código ictus: Documento de consenso SENR, SERAU, GEECV-SEN, SERAM. RADIOLOGIA 2023. [DOI: 10.1016/j.rx.2022.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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12
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He Y, Luo Z, Zhou Y, Xue R, Li J, Hu H, Yan S, Chen Z, Wang J, Lou M. U-net Models Based on Computed Tomography Perfusion Predict Tissue Outcome in Patients with Different Reperfusion Patterns. Transl Stroke Res 2022; 13:707-715. [PMID: 35043358 DOI: 10.1007/s12975-022-00986-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 12/05/2021] [Accepted: 01/10/2022] [Indexed: 12/30/2022]
Abstract
Evaluation of cerebral perfusion is important for treatment selection in patients with acute large vessel occlusion (LVO). To assess ischemic core and tissue at risk more accurately, we developed a deep learning model named U-net using computed tomography perfusion (CTP) images. A total of 110 acute ischemic stroke patients undergoing endovascular treatment with major reperfusion (≥ 80%) or minimal reperfusion (≤ 20%) were included. Using baseline CTP, we developed two U-net models: one model in major reperfusion group to identify infarct core; the other in minimal reperfusion group to identify tissue at risk. The performance of fixed-thresholding methods was compared with that of U-net models. In the major reperfusion group, the model estimated infarct core with a Dice score coefficient (DSC) of 0.61 and an area under the curve (AUC) of 0.92, while fixed-thresholding methods had a DSC of 0.52. In the minimal reperfusion group, the model estimated tissue at risk with a DSC of 0.67 and an AUC of 0.93, while fixed-thresholding methods had a DSC of 0.51. In both groups, excellent volumetric consistency (intraclass correlation coefficient was 0.951 in major reperfusion and 0.746 in minimal reperfusion) was achieved between the estimated lesion and the actual lesion volume. Thus, in patients with anterior LVO, the CTP-based U-net models were able to identify infarct core and tissue at risk on baseline CTP superior to fixed-thresholding methods, providing individualized prediction of final lesion in patients with different reperfusion patterns.
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Affiliation(s)
- Yaode He
- Department of Neurology, School of Medicine, the Second Affiliated Hospital of Zhejiang University, 88# Jiefang Road, Hangzhou, 310009, China
| | - Zhongyu Luo
- Department of Neurology, School of Medicine, the Second Affiliated Hospital of Zhejiang University, 88# Jiefang Road, Hangzhou, 310009, China
| | - Ying Zhou
- Department of Neurology, School of Medicine, the Second Affiliated Hospital of Zhejiang University, 88# Jiefang Road, Hangzhou, 310009, China
| | - Rui Xue
- Department of Neurology, School of Medicine, the Second Affiliated Hospital of Zhejiang University, 88# Jiefang Road, Hangzhou, 310009, China
| | - Jiaping Li
- Department of Neurology, School of Medicine, the Second Affiliated Hospital of Zhejiang University, 88# Jiefang Road, Hangzhou, 310009, China
| | - Haitao Hu
- Department of Neurology, School of Medicine, the Second Affiliated Hospital of Zhejiang University, 88# Jiefang Road, Hangzhou, 310009, China
| | - Shenqiang Yan
- Department of Neurology, School of Medicine, the Second Affiliated Hospital of Zhejiang University, 88# Jiefang Road, Hangzhou, 310009, China
| | - Zhicai Chen
- Department of Neurology, School of Medicine, the Second Affiliated Hospital of Zhejiang University, 88# Jiefang Road, Hangzhou, 310009, China
| | - Jianan Wang
- Department of Neurology, School of Medicine, the Second Affiliated Hospital of Zhejiang University, 88# Jiefang Road, Hangzhou, 310009, China
| | - Min Lou
- Department of Neurology, School of Medicine, the Second Affiliated Hospital of Zhejiang University, 88# Jiefang Road, Hangzhou, 310009, China.
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Carrera E, Baron JC. Patient Selection for Thrombectomy Using Brain Imaging: Does Time Still Matter? Neurology 2022; 98:867-868. [PMID: 35450965 DOI: 10.1212/wnl.0000000000200719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Emmanuel Carrera
- From the Stroke Center, Department of Clinical Neurosciences (E.C.), Geneva University Hospital; Faculty of Medicine (E.C.), Geneva, Switzerland; Department of Neurology (J.-C.B.), Hôpital Sainte-Anne and Université de Paris; INSERM U1266 (J.-C.B.), Institut de Psychiatrie et Neurosciences de Paris, France
| | - Jean-Claude Baron
- From the Stroke Center, Department of Clinical Neurosciences (E.C.), Geneva University Hospital; Faculty of Medicine (E.C.), Geneva, Switzerland; Department of Neurology (J.-C.B.), Hôpital Sainte-Anne and Université de Paris; INSERM U1266 (J.-C.B.), Institut de Psychiatrie et Neurosciences de Paris, France
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14
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Muir KW, Saposnik G. Current State and Future for Emerging Stroke Therapies: Reflections and Reactions. Stroke 2022; 53:2082-2084. [PMID: 35535598 DOI: 10.1161/strokeaha.122.039796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Keith W Muir
- School of Psychology and Neuroscience, Queen Elizabeth University Hospital, University of Glasgow, Scotland, United Kingdom (K.W.M.)
| | - Gustavo Saposnik
- Stroke Outcomes and Decision Neuroscience Unit, Li Ka Shing Institute, University of Toronto, Canada (G.S.).,Division of Neurology, Department of Medicine, St. Michael's Hospital, University of Toronto, Canada (G.S.)
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