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Hou X, Wu T, Li D, Xu R. Application of Synthetic Time-Of-Flight Magnetic Resonance Angiography-Computed Tomography Fusion Imaging in Preoperative Planning for Aneurysm Clipping Surgery: A Comparative Study with Three-Dimensional Computed Tomography Angiography. World Neurosurg 2024:S1878-8750(24)01259-2. [PMID: 39033806 DOI: 10.1016/j.wneu.2024.07.119] [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: 05/02/2024] [Revised: 07/14/2024] [Accepted: 07/15/2024] [Indexed: 07/23/2024]
Abstract
OBJECTIVE Some patients with intracranial aneurysms (IAs) cannot undergo three-dimensional computed tomography angiography (3D-CTA) or digital subtraction angiography due to contraindications to contrast agents or radiation. Time-of-flight magnetic resonance angiography (TOF-MRA) offers a contrast-free alternative but lacks cranial bone detail critical for surgical planning. This study evaluates the feasibility of using 3D Slicer to fuse TOF-MRA with thin-section CT images to generate synthetic images resembling CTA for surgical clipping planning. METHODS This prospective study included 22 patients with unruptured IAs and 8 with ruptured IAs undergoing aneurysm clipping surgery (≥3 mm). TOF-MRA and CT/3D-CTA scans were fused using 3D Slicer. Neuroradiologists and neurosurgeons independently assessed 3D-CTA and synthetic TOF-MRA-CT images for aneurysm detection rates, morphology, and dimensions. Evaluation metrics included dice similarity coefficient and 95% Hausdorff distance. RESULTS Evaluation of aneurysm detection rates, morphology, and dimensions showed no significant differences between synthetic TOF-MRA-CT fusion images and 3D-CTA (all P > 0.05). Neuroradiologist assessments revealed strong concordance in aneurysm morphology between synthetic TOF-MRA-CT fusion images and 3D-CTA (κ = 0.867, P < 0.001). The dice similarity coefficient (0.937 ± 0.012) and Hausdorff distance (4.54 ± 0.26) indicated a high degree of image overlap between synthetic TOF-MRA-CT fusion images and 3D-CTA. Surgeons rated the consistency of aneurysm morphology between synthetic TOF-MRA-CT fusion images and intraoperative findings as strongly concordant (κ = 0.873, P < 0.001). CONCLUSIONS Synthetic TOF-MRA-CT fusion images closely match 3D-CTA for ≥3 mm aneurysms, demonstrating comparable diagnostic and surgical clipping planning effectiveness. They represent a promising alternative for personalized preoperative planning, particularly when contrast agents are contraindicated.
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Affiliation(s)
- Xiaolin Hou
- The Department of Neurosurgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China.
| | - Tao Wu
- Department of Neurosurgery, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Dingjun Li
- Department of Neurosurgery, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Ruxiang Xu
- The Department of Neurosurgery, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China
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Zhou G, Wang J, Liu W, Gu W, Su M, Feng Y, Qin B, Zhu Y. An assessment of how the anterior cerebral artery anatomy impacts ACoA aneurysm formation based on CFD analysis. Br J Neurosurg 2024; 38:215-219. [PMID: 32988230 DOI: 10.1080/02688697.2020.1821867] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 06/26/2020] [Accepted: 09/04/2020] [Indexed: 12/27/2022]
Abstract
OBJECTIVE The aim of this study was to identify independent anatomic, morphologic and hemodynamic features of the ACoA (anterior communicating artery) complex that serve as risk factors for the occurrence of ACoA aneurysms. METHODS Fifteen consecutive patients with 15 ACoA aneurysms were included. Computational fluid dynamics (CFD) simulations based on patient-specific models were carried out using 3D time-of-flight magnetic resonance angiography (3D-TOF-MRA) images. A reverse reconstruction technique was used to generate a pre-aneurysm vessel anatomy. Geometric parameters and hemodynamic changes were compared and evaluated. RESULTS The overall prevalence of symmetric, dysplastic, and absent A1 segments were 53.3%, 26.7%, and 20%. The mean wall shear stress (WSS) of the absent group (AG) was significantly higher than that of the symmetric group (SG) and dysplastic group (DG). The absolute mean A1 artery flow rate (410.2 ± 88 versus 439.4 ± 101 mL/min; p = .45) of the aneurysm side was similar between the SG and DG but significantly higher in the AG (528.1 ± 77 mL/min; p < .05). The A1-A2 angles of the aneurysm side showed no significant differences among the 3 groups (p = .32). However, the mean A1-A2 angle on the aneurysm side was smaller than the contralateral A1-A2 angle (101.9 ± 9.1˚ versus 120.3 ± 7.7˚; p <.05). A regression analysis demonstrated that high WSS was significantly associated with a large A1-A2 ratio (R2=0.52; p <.05). CONCLUSIONS ACoA aneurysms are a high-WSS pathology. Severe flow impingement and the anatomic vasculature structures play a role in triggering the occurrence of ACoA aneurysms.
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Affiliation(s)
- Geng Zhou
- Department of Radiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Jienan Wang
- Department of Radiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Weidong Liu
- Department of Neurosurgery, Shanghai Punan Hospital, Shanghai, China
| | - Wenquan Gu
- Department of Neurosurgery, Shanghai Punan Hospital, Shanghai, China
| | - Ming Su
- Department of Radiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Yong Feng
- Shanghai Micro-Invention Medical Devices Co., Ltd, Shanghai, China
| | - Binjie Qin
- Department of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Yueqi Zhu
- Department of Radiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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Luo X, Wang J, Liang X, Yan L, Chen X, He J, Luo J, Zhao B, He G, Wang M, Zhu Y. Prediction of cerebral aneurysm rupture using a point cloud neural network. J Neurointerv Surg 2023; 15:380-386. [PMID: 35396332 DOI: 10.1136/neurintsurg-2022-018655] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 03/27/2022] [Indexed: 11/04/2022]
Abstract
OBJECTIVE Accurate prediction of cerebral aneurysm (CA) rupture is of great significance. We intended to evaluate the accuracy of the point cloud neural network (PC-NN) in predicting CA rupture using MR angiography (MRA) and CT angiography (CTA) data. METHODS 418 CAs in 411 consecutive patients confirmed by CTA (n=180) or MRA (n=238) in a single hospital were retrospectively analyzed. A PC-NN aneurysm model with/without parent artery involvement was used for CA rupture prediction and compared with ridge regression, support vector machine (SVM) and neural network (NN) models based on radiomics features. Furthermore, the performance of the trained PC-NN and radiomics-based models was prospectively evaluated in 258 CAs of 254 patients from five external centers. RESULTS In the internal test data, the area under the curve (AUC) of the PC-NN model trained with parent artery (AUC=0.913) was significantly higher than that of the PC-NN model trained without parent artery (AUC=0.851; p=0.041) and of the ridge regression (AUC=0.803; p=0.019), SVM (AUC=0.788; p=0.013) and NN (AUC=0.805; p=0.023) radiomics-based models. Additionally, the PC-NN model trained with MRA source data achieved a higher prediction accuracy (AUC=0.936) than that trained with CTA source data (AUC=0.824; p=0.043). In external data of prospective cohort patients, the AUC of PC-NN was 0.835, significantly higher than ridge regression (0.692; p<0.001), SVM (0.701; p<0.001) and NN (0.681; p<0.001) models. CONCLUSION PC-NNs can achieve more accurate CA rupture prediction than traditional radiomics-based models. Furthermore, the performance of the PC-NN model trained with MRA data was superior to that trained with CTA data.
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Affiliation(s)
- Xiaoyuan Luo
- Digital Medical Research Center and also with the Shanghai Key Laboratory of Medical Image Computing and Computer Assisted Intervention, Fudan University, Shanghai, China
| | - Jienan Wang
- Department of Radiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Xinmei Liang
- Department of Radiology, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
| | - Lei Yan
- Department of Interventional Radiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - XinHua Chen
- Department of Neurosurgery, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Jian He
- Department of Nuclear Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Jing Luo
- Department of Neurosurgery, Anhui Medical University Affiliated First Hospital, Hefei, China
| | - Bing Zhao
- Department of Neurosurgery, Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Guangchen He
- Department of Radiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Manning Wang
- Digital Medical Research Center and also with the Shanghai Key Laboratory of Medical Image Computing and Computer Assisted Intervention, Fudan University, Shanghai, China
| | - Yueqi Zhu
- Department of Radiology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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Chen J, Feng X, Peng F, Tong X, Niu H, Liu A. Cost-Effective Analysis of Different Diagnostic Strategies in Screening for Aneurysms After Spontaneous Subarachnoid Hemorrhage. Acad Radiol 2022; 29 Suppl 3:S36-S43. [PMID: 33288399 DOI: 10.1016/j.acra.2020.11.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 11/05/2020] [Indexed: 12/25/2022]
Abstract
PURPOSE With an increasing number of patients being treated by coiling for aneurysms, using computed tomographic angiography (CTA) or magnetic resonance angiography (MRA) as an initial screening test becomes less important because digital subtraction angiography (DSA) is the first step of endovascular treatment procedure. The objective of this study is to investigate whether CTA or MRA remained to be the optimal screening strategy in patients with spontaneous subarachnoid hemorrhage (SAH). METHODS CTA, MRA, and DSA strategy were evaluated in a decision tree model created with TreeAge Pro Suite 2011. Input parameters were derived from published literature and our institutional database. Base case and sensitivity analyses were conducted to assess the cost-effectiveness of each strategy. A Monte Carlo simulation was performed with all parameters ranged among their distributions to evaluate the validation of results. RESULTS The base case scenario showed that MRA was the most cost-effective strategy. Using a willingness-to-pay threshold of ¥70,892/quality adjusted life year, MRA remained to be most cost-effective when its sensitivity is >0.907. DSA was not cost-effective compared to CTA or MRA unless over 91.56% of patients were treated by coiling. The Monte Carlo simulation reported DSA not to be a cost-effective strategy at willingness-to-pay of ¥70,892 in 99.99% of the iterations. CONCLUSION DSA is not cost-effective compared to CTA or MRA and should not be used as the initial diagnostic tool for spontaneous SAH.
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Affiliation(s)
- Jigang Chen
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China; Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
| | - Xin Feng
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China; Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
| | - Fei Peng
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China; Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
| | - Xin Tong
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China; Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
| | - Hao Niu
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China; Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China
| | - Aihua Liu
- Beijing Neurosurgical Institute, Capital Medical University, Beijing, China; Department of Interventional Neuroradiology, Beijing Tiantan Hospital, Capital Medical University, 100070 Beijing, China.
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He G, Wang J, Zhang Y, Li M, Lu H, Cheng Y, Zhu Y. Diagnostic Performance of MRA for UnrupturedAneurysms at the Distal ICA. Clin Neuroradiol 2022; 32:507-515. [DOI: 10.1007/s00062-021-01076-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/21/2021] [Indexed: 11/03/2022]
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Neifert SN, Chapman EK, Martini ML, Shuman WH, Schupper AJ, Oermann EK, Mocco J, Macdonald RL. Aneurysmal Subarachnoid Hemorrhage: the Last Decade. Transl Stroke Res 2020; 12:428-446. [PMID: 33078345 DOI: 10.1007/s12975-020-00867-0] [Citation(s) in RCA: 164] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/09/2020] [Accepted: 10/12/2020] [Indexed: 12/12/2022]
Abstract
Aneurysmal subarachnoid hemorrhage (SAH) affects six to nine people per 100,000 per year, has a 35% mortality, and leaves many with lasting disabilities, often related to cognitive dysfunction. Clinical decision rules and more sensitive computed tomography (CT) have made the diagnosis of SAH easier, but physicians must maintain a high index of suspicion. The management of these patients is based on a limited number of randomized clinical trials (RCTs). Early repair of the ruptured aneurysm by endovascular coiling or neurosurgical clipping is essential, and coiling is superior to clipping in cases amenable to both treatments. Aneurysm repair prevents rebleeding, leaving the most important prognostic factors for outcome early brain injury from the hemorrhage, which is reflected in the neurologic condition of the patient, and delayed cerebral ischemia (DCI). Observational studies suggest outcomes are better when patients are managed in specialized neurologic intensive care units with inter- or multidisciplinary clinical groups. Medical management aims to minimize early brain injury, cerebral edema, hydrocephalus, increased intracranial pressure (ICP), and medical complications. Management then focuses on preventing, detecting, and treating DCI. Nimodipine is the only pharmacologic treatment that is approved for SAH in most countries, as no other intervention has demonstrated efficacy. In fact, much of SAH management is derived from studies in other patient populations. Therefore, further study of complications, including DCI and other medical complications, is needed to optimize outcomes for this fragile patient population.
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Affiliation(s)
- Sean N Neifert
- Department of Neurosurgery, Mount Sinai Health System, New York, NY, 10029, USA
| | - Emily K Chapman
- Department of Neurosurgery, Mount Sinai Health System, New York, NY, 10029, USA
| | - Michael L Martini
- Department of Neurosurgery, Mount Sinai Health System, New York, NY, 10029, USA
| | - William H Shuman
- Department of Neurosurgery, Mount Sinai Health System, New York, NY, 10029, USA
| | | | - Eric K Oermann
- Department of Neurosurgery, Mount Sinai Health System, New York, NY, 10029, USA
| | - J Mocco
- Department of Neurosurgery, Mount Sinai Health System, New York, NY, 10029, USA
| | - R Loch Macdonald
- University Neurosciences Institutes, University of California San Francisco, Fresno Campus, Fresno, CA, 93701-2302, USA.
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Hendricks BK, Yoon JS, Yaeger K, Kellner CP, Mocco J, De Leacy RA, Ducruet AF, Lawton MT, Mascitelli JR. Wide-neck aneurysms: systematic review of the neurosurgical literature with a focus on definition and clinical implications. J Neurosurg 2020; 133:159-165. [PMID: 31200376 DOI: 10.3171/2019.3.jns183160] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 03/08/2019] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Wide-necked aneurysms (WNAs) are a variably defined subset of cerebral aneurysms that require more advanced endovascular and microsurgical techniques than those required for narrow-necked aneurysms. The neurosurgical literature includes many definitions of WNAs, and a systematic review has not been performed to identify the most commonly used or optimal definition. The purpose of this systematic review was to highlight the most commonly used definition of WNAs. METHODS The authors searched PubMed for the years 1998-2017, using the terms "wide neck aneurysm" and "broad neck aneurysm" to identify relevant articles. All results were screened for having a minimum of 30 patients and for clearly stating a definition of WNA. Reference lists for all articles meeting the inclusion criteria were also screened for eligibility. RESULTS The search of the neurosurgical literature identified 809 records, of which 686 were excluded (626 with < 30 patients; 60 for lack of a WNA definition), leaving 123 articles for analysis. Twenty-seven unique definitions were identified and condensed into 14 definitions. The most common definition was neck size ≥ 4 mm or dome-to-neck ratio < 2, which was used in 49 articles (39.8%). The second most commonly used definition was neck size ≥ 4 mm, which was used in 26 articles (21.1%). The rest of the definitions included similar parameters with variable thresholds. There was inconsistent reporting of the precise dome measurements used to determine the dome-to-neck ratio. Digital subtraction angiography was the only imaging modality used to study the aneurysm morphology in 87 of 122 articles (71.3%). CONCLUSIONS The literature has great variability regarding the definition of a WNA. The most prevalent definition is a neck diameter of ≥ 4 mm or a dome-to-neck ratio of < 2. Whether this is the most appropriate and clinically useful definition is an area for future study.
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Affiliation(s)
- Benjamin K Hendricks
- 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona; and
| | - James S Yoon
- 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona; and
| | - Kurt Yaeger
- 2Department of Neurosurgery, The Mount Sinai Health System, New York, New York
| | | | - J Mocco
- 2Department of Neurosurgery, The Mount Sinai Health System, New York, New York
| | - Reade A De Leacy
- 2Department of Neurosurgery, The Mount Sinai Health System, New York, New York
| | - Andrew F Ducruet
- 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona; and
| | - Michael T Lawton
- 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona; and
| | - Justin R Mascitelli
- 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona; and
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Mohan M, Islim AI, Rasul FT, Rominiyi O, deSouza RM, Poon MTC, Jamjoom AAB, Kolias AG, Woodfield J, Patel K, Chari A, Kirollos R. Subarachnoid haemorrhage with negative initial neurovascular imaging: a systematic review and meta-analysis. Acta Neurochir (Wien) 2019; 161:2013-2026. [PMID: 31410556 PMCID: PMC6739283 DOI: 10.1007/s00701-019-04025-w] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 07/25/2019] [Indexed: 02/07/2023]
Abstract
Background In patients with spontaneous subarachnoid haemorrhage (SAH), a vascular cause for the bleed is not always found on initial investigations. This study aimed to systematically evaluate the delayed investigation strategies and clinical outcomes in these cases, often described as “non-aneurysmal” SAH (naSAH). Methods A systematic review was performed in concordance with the PRISMA checklist. Pooled proportions of primary outcome measures were estimated using a random-effects model. Results Fifty-eight studies were included (4473 patients). The cohort was split into perimesencephalic naSAH (PnaSAH) (49.9%), non-PnaSAH (44.7%) and radiologically negative SAH identified on lumbar puncture (5.4%). The commonest initial vascular imaging modality was digital subtraction angiography. A vascular abnormality was identified during delayed investigation in 3.9% [95% CI 1.9–6.6]. There was no uniform strategy for the timing or modality of delayed investigations. The pooled proportion of a favourable modified Rankin scale outcome (0–2) at 3–6 months following diagnosis was 92.0% [95% CI 86.0–96.5]. Complications included re-bleeding (3.1% [95% CI 1.5–5.2]), hydrocephalus (16.0% [95% CI 11.2–21.4]), vasospasm (9.6% [95% CI 6.5–13.3]) and seizure (3.5% [95% CI 1.7–5.8]). Stratified by bleeding pattern, we demonstrate a higher rate of delayed diagnoses (13.6% [95% CI 7.4–21.3]), lower proportion of favourable functional outcome (87.2% [95% CI 80.1–92.9]) and higher risk of complications for non-PnaSAH patients. Conclusion This study highlights the heterogeneity in delayed investigations and outcomes for patients with naSAH, which may be influenced by the initial pattern of bleeding. Further multi-centre prospective studies are required to clarify optimal tailored management strategies for this heterogeneous group of patients. Electronic supplementary material The online version of this article (10.1007/s00701-019-04025-w) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Midhun Mohan
- Department of Neurosurgery, The Walton Centre NHS Foundation Trust and University of Liverpool, Liverpool, UK
| | - Abdurrahman I Islim
- Department of Neurosurgery, The Walton Centre NHS Foundation Trust and University of Liverpool, Liverpool, UK
| | - Fahid T Rasul
- Department of Neurosurgery, Queen's Hospital, Romford, UK
| | - Ola Rominiyi
- Department of Neurosurgery, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
| | | | | | - Aimun A B Jamjoom
- Department of Clinical Neurosciences, Western General Hospital, Edinburgh, UK
| | - Angelos G Kolias
- Division of Neurosurgery, Department of Clinical Neurosciences, University of Cambridge and Addenbrooke's Hospital, Cambridge, UK
| | - Julie Woodfield
- Department of Clinical Neurosciences, Western General Hospital, Edinburgh, UK
| | - Krunal Patel
- Division of Neurosurgery, Krembil Research Institute, Toronto Western Hospital, University Health Network and University of Toronto, Toronto, Canada
| | - Aswin Chari
- Institute of Child Health, University College London, London, UK.
- Department of Neurosurgery, Great Ormond Street Hospital, Great Ormond Street, WC1N 3JH, London, UK.
| | - Ramez Kirollos
- Division of Neurosurgery, Department of Clinical Neurosciences, University of Cambridge and Addenbrooke's Hospital, Cambridge, UK
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Matsukawa H, Miyazaki T, Kiko K, Kamiyama H, Ota N, Noda K, Takahashi O, Shonai T, Fujisawa T, Tokuda S, Tanikawa R. Thick Clot in the Inferior Limiting Sulcus on Computed Tomography Image as an Indicator of Sylvian Subpial Hematoma in Patients with Aneurysmal Subarachnoid Hemorrhage. World Neurosurg 2019; 125:e612-e619. [PMID: 30716497 DOI: 10.1016/j.wneu.2019.01.138] [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: 10/18/2018] [Revised: 01/11/2019] [Accepted: 01/14/2019] [Indexed: 10/27/2022]
Abstract
OBJECTIVE Sylvian subpial hematoma (SSH) is occasionally observed in aneurysm subarachnoid hemorrhage (aSAH) when accompanied with the thick clot in the inferior limiting sulcus (ILS). We aimed to determine whether the thickness of the clot in the ILS (TCILS) was an indicator of SSH. METHODS Data from 150 consecutive patients with aSAH were retrospectively analyzed. The relationship between TCILS on axial computed tomography (CT) image and intraoperatively confirmed SSH was reviewed. In patients without SSH, the average of the clot thickness in the bilateral ILS was used. The primary outcome was SSH. RESULTS The median TCILS of the SSH group (n = 18, 12%) was larger than that of the non-SSH group (n = 132, 88%) (21 vs. 2.1 mm, respectively; P < 0.001). The intraclass correlation coefficients for clot thickness in the right and left ILS between 2 observers were 0.97 (P < 0.001) and 0.85 (P < 0.001). The TCILS threshold of ≥6.0 mm was associated with SSH, with a sensitivity of 89% and specificity of 99%. The unadjusted and adjusted odds ratios of the SSH of clot thickness in the affected ILS ≥6 mm relative to clot thickness in the affected ILS <6 mm were 263 (95% confidence interval [CI], 46-5063) and 137 (95% CI, 19-3029), respectively. CONCLUSIONS The clot thickness in the ILS on CT image was easily measured and could be a marker of SSH. SSH assessment could be useful in helping us predict the clinical course in patients with aSAH.
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Affiliation(s)
- Hidetoshi Matsukawa
- Department of Neurosurgery, Stroke Center, Teishinkai Hospital, Sapporo, Japan
| | - Takanori Miyazaki
- Department of Neurosurgery, Stroke Center, Teishinkai Hospital, Sapporo, Japan
| | - Katsunari Kiko
- Department of Neurosurgery, Stroke Center, Teishinkai Hospital, Sapporo, Japan
| | - Hiroyasu Kamiyama
- Department of Neurosurgery, Stroke Center, Teishinkai Hospital, Sapporo, Japan
| | - Nakao Ota
- Department of Neurosurgery, Stroke Center, Teishinkai Hospital, Sapporo, Japan
| | - Kosumo Noda
- Department of Neurosurgery, Stroke Center, Teishinkai Hospital, Sapporo, Japan
| | - Osamu Takahashi
- St.Luke's International University Graduate School of Public Health, Internal Medicine, St. Luke's International Hospital, Tokyo, Japan
| | - Takaharu Shonai
- Department of Radiology, Teishinkai Hospital, Sapporo, Japan
| | | | - Sadahisa Tokuda
- Department of Neurosurgery, Stroke Center, Teishinkai Hospital, Sapporo, Japan
| | - Rokuya Tanikawa
- Department of Neurosurgery, Stroke Center, Teishinkai Hospital, Sapporo, Japan.
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Sichtermann T, Faron A, Sijben R, Teichert N, Freiherr J, Wiesmann M. Deep Learning-Based Detection of Intracranial Aneurysms in 3D TOF-MRA. AJNR Am J Neuroradiol 2018; 40:25-32. [PMID: 30573461 DOI: 10.3174/ajnr.a5911] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 10/29/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND PURPOSE The rupture of an intracranial aneurysm is a serious incident, causing subarachnoid hemorrhage associated with high fatality and morbidity rates. Because the demand for radiologic examinations is steadily growing, physician fatigue due to an increased workload is a real concern and may lead to mistaken diagnoses of potentially relevant findings. Our aim was to develop a sufficient system for automated detection of intracranial aneurysms. MATERIALS AND METHODS In a retrospective study, we established a system for the detection of intracranial aneurysms from 3D TOF-MRA data. The system is based on an open-source neural network, originally developed for segmentation of anatomic structures in medical images. Eighty-five datasets of patients with a total of 115 intracranial aneurysms were used to train the system and evaluate its performance. Manual annotation of aneurysms based on radiologic reports and critical revision of image data served as the reference standard. Sensitivity, false-positives per case, and positive predictive value were determined for different pipelines with modified pre- and postprocessing. RESULTS The highest overall sensitivity of our system for the detection of intracranial aneurysms was 90% with a sensitivity of 96% for aneurysms with a diameter of 3-7 mm and 100% for aneurysms of >7 mm. The best location-dependent performance was in the posterior circulation. Pre- and postprocessing sufficiently reduced the number of false-positives. CONCLUSIONS Our system, based on a deep learning convolutional network, can detect intracranial aneurysms with a high sensitivity from 3D TOF-MRA data.
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Affiliation(s)
- T Sichtermann
- From the Department of Diagnostic and Interventional Neuroradiology (T.S., A.F., R.S., N.T., J.F., M.W.), University Hospital RWTH Aachen, Aachen, Germany
| | - A Faron
- From the Department of Diagnostic and Interventional Neuroradiology (T.S., A.F., R.S., N.T., J.F., M.W.), University Hospital RWTH Aachen, Aachen, Germany.,Department of Radiology (A.F.), University Hospital Bonn, Bonn, Germany
| | - R Sijben
- From the Department of Diagnostic and Interventional Neuroradiology (T.S., A.F., R.S., N.T., J.F., M.W.), University Hospital RWTH Aachen, Aachen, Germany
| | - N Teichert
- From the Department of Diagnostic and Interventional Neuroradiology (T.S., A.F., R.S., N.T., J.F., M.W.), University Hospital RWTH Aachen, Aachen, Germany.,Department of Radiology (A.F.), University Hospital Bonn, Bonn, Germany
| | - J Freiherr
- From the Department of Diagnostic and Interventional Neuroradiology (T.S., A.F., R.S., N.T., J.F., M.W.), University Hospital RWTH Aachen, Aachen, Germany
| | - M Wiesmann
- From the Department of Diagnostic and Interventional Neuroradiology (T.S., A.F., R.S., N.T., J.F., M.W.), University Hospital RWTH Aachen, Aachen, Germany
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