Dual-Energy CT Follow-Up After Stroke Thrombolysis Alters Assessment of Hemorrhagic Complications
Background and Purpose: We aimed to determine whether dual-energy CT (DECT) follow-up can differentiate contrast staining (CS) from intracranial hemorrhage (ICH) in stroke patients treated with intravenous thrombolysis (IVT), who had undergone acute stroke imaging using CT angiography (CTA), and CT...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2020-05-01
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| Series: | Frontiers in Neurology |
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| Online Access: | https://www.frontiersin.org/article/10.3389/fneur.2020.00357/full |
| _version_ | 1818479250162843648 |
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| author | Håkan Almqvist Håkan Almqvist Niklas S. Almqvist Staffan Holmin Staffan Holmin Michael V. Mazya Michael V. Mazya |
| author_facet | Håkan Almqvist Håkan Almqvist Niklas S. Almqvist Staffan Holmin Staffan Holmin Michael V. Mazya Michael V. Mazya |
| author_sort | Håkan Almqvist |
| collection | DOAJ |
| description | Background and Purpose: We aimed to determine whether dual-energy CT (DECT) follow-up can differentiate contrast staining (CS) from intracranial hemorrhage (ICH) in stroke patients treated with intravenous thrombolysis (IVT), who had undergone acute stroke imaging using CT angiography (CTA), and CT perfusion (CTP).Materials and Methods: Between November 2012 and January 2018, 168 patients at our comprehensive stroke center underwent DECT follow-up within 36 h after IVT and acute CTA with or without CTP but did not receive intra-arterial imaging or treatment. Two independent readers evaluated plain monochromatic CT (pCT) alone and compared this with a second reading of a combined DECT approach using pCT and water- and iodine-weighted images, establishing and grading the ICH diagnosis, per Heidelberg and Safe Implementation of Treatments in Stroke Monitoring Study (SITS-MOST) classifications.Results: On pCT alone within 36 h, 31/168 (18.5%) patients had findings diagnosed as ICH. Using combined DECT (cDECT) changed ICH diagnosis to “CS only” in 3/168 (1.8%) patients, constituting 3/31 (9.7%) of cases with initially pCT-diagnosed ICH. These three cases had pCT diagnoses of one SAH, one minor, and one more extensive petechial hemorrhage (hemorrhagic infarction types 1 and 2), respectively. pCT alone had a 100% sensitivity, 98% specificity, 90% positive predictive value (PPV), 100% negative predictive value (NPV), and 98% accuracy for any ICH, compared to the cDECT. Inter-reader agreement for ICH classification using pCT compared to DECT was weighted kappa 0.92 (95% CI 0.87–0.98) vs. 0.91 (0.85–0.95).Conclusion: Compared to pCT, DECT within 36 h after IV thrombolysis for acute ischemic stroke, changes the radiological diagnosis of post-treatment ICH to “CS only” in a small proportion of patients. Studies are warranted of whether the altered radiological reports have an impact on patient management, for example initiation timing of antithrombotic secondary prevention. |
| first_indexed | 2024-12-10T09:58:18Z |
| format | Article |
| id | doaj.art-e5d2c4153b574d86bfe64d5aac1c86a0 |
| institution | Directory Open Access Journal |
| issn | 1664-2295 |
| language | English |
| last_indexed | 2024-12-10T09:58:18Z |
| publishDate | 2020-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Neurology |
| spelling | doaj.art-e5d2c4153b574d86bfe64d5aac1c86a02022-12-22T01:53:26ZengFrontiers Media S.A.Frontiers in Neurology1664-22952020-05-011110.3389/fneur.2020.00357541305Dual-Energy CT Follow-Up After Stroke Thrombolysis Alters Assessment of Hemorrhagic ComplicationsHåkan Almqvist0Håkan Almqvist1Niklas S. Almqvist2Staffan Holmin3Staffan Holmin4Michael V. Mazya5Michael V. Mazya6Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, SwedenDepartment of Neuroradiology, Karolinska University Hospital, Stockholm, SwedenMedical Programme, Karolinska Institutet, Stockholm, SwedenDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, SwedenDepartment of Neuroradiology, Karolinska University Hospital, Stockholm, SwedenDepartment of Clinical Neuroscience, Karolinska Institutet, Stockholm, SwedenDepartment of Neurovascular Diseases, Karolinska University Hospital, Stockholm, SwedenBackground and Purpose: We aimed to determine whether dual-energy CT (DECT) follow-up can differentiate contrast staining (CS) from intracranial hemorrhage (ICH) in stroke patients treated with intravenous thrombolysis (IVT), who had undergone acute stroke imaging using CT angiography (CTA), and CT perfusion (CTP).Materials and Methods: Between November 2012 and January 2018, 168 patients at our comprehensive stroke center underwent DECT follow-up within 36 h after IVT and acute CTA with or without CTP but did not receive intra-arterial imaging or treatment. Two independent readers evaluated plain monochromatic CT (pCT) alone and compared this with a second reading of a combined DECT approach using pCT and water- and iodine-weighted images, establishing and grading the ICH diagnosis, per Heidelberg and Safe Implementation of Treatments in Stroke Monitoring Study (SITS-MOST) classifications.Results: On pCT alone within 36 h, 31/168 (18.5%) patients had findings diagnosed as ICH. Using combined DECT (cDECT) changed ICH diagnosis to “CS only” in 3/168 (1.8%) patients, constituting 3/31 (9.7%) of cases with initially pCT-diagnosed ICH. These three cases had pCT diagnoses of one SAH, one minor, and one more extensive petechial hemorrhage (hemorrhagic infarction types 1 and 2), respectively. pCT alone had a 100% sensitivity, 98% specificity, 90% positive predictive value (PPV), 100% negative predictive value (NPV), and 98% accuracy for any ICH, compared to the cDECT. Inter-reader agreement for ICH classification using pCT compared to DECT was weighted kappa 0.92 (95% CI 0.87–0.98) vs. 0.91 (0.85–0.95).Conclusion: Compared to pCT, DECT within 36 h after IV thrombolysis for acute ischemic stroke, changes the radiological diagnosis of post-treatment ICH to “CS only” in a small proportion of patients. Studies are warranted of whether the altered radiological reports have an impact on patient management, for example initiation timing of antithrombotic secondary prevention.https://www.frontiersin.org/article/10.3389/fneur.2020.00357/fullspectral computed tomographyacute ischemic strokeintravenous thrombolysiscomputed tomographyintracerebral hemorrhage (ICH) |
| spellingShingle | Håkan Almqvist Håkan Almqvist Niklas S. Almqvist Staffan Holmin Staffan Holmin Michael V. Mazya Michael V. Mazya Dual-Energy CT Follow-Up After Stroke Thrombolysis Alters Assessment of Hemorrhagic Complications Frontiers in Neurology spectral computed tomography acute ischemic stroke intravenous thrombolysis computed tomography intracerebral hemorrhage (ICH) |
| title | Dual-Energy CT Follow-Up After Stroke Thrombolysis Alters Assessment of Hemorrhagic Complications |
| title_full | Dual-Energy CT Follow-Up After Stroke Thrombolysis Alters Assessment of Hemorrhagic Complications |
| title_fullStr | Dual-Energy CT Follow-Up After Stroke Thrombolysis Alters Assessment of Hemorrhagic Complications |
| title_full_unstemmed | Dual-Energy CT Follow-Up After Stroke Thrombolysis Alters Assessment of Hemorrhagic Complications |
| title_short | Dual-Energy CT Follow-Up After Stroke Thrombolysis Alters Assessment of Hemorrhagic Complications |
| title_sort | dual energy ct follow up after stroke thrombolysis alters assessment of hemorrhagic complications |
| topic | spectral computed tomography acute ischemic stroke intravenous thrombolysis computed tomography intracerebral hemorrhage (ICH) |
| url | https://www.frontiersin.org/article/10.3389/fneur.2020.00357/full |
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