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Hiromu Mori - One of the best experts on this subject based on the ideXlab platform.
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Shunted pouches of cavernous sinus dural AVFs: evaluation by 3D Rotational Angiography
Neuroradiology, 2015Co-Authors: Hiro Kiyosue, Shuichi Tanoue, Norio Hongo, Yuzo Hori, Hiromu MoriAbstract:Introduction The aims of this study were to evaluate the angioarchitecture of cavernous sinus dural arteriovenous fistulas (CSdAVFs), including the number and location of shunted pouches (SPs), and to evaluate whether the location and number of the SPs affect the outcomes of transvenous embolization of CSdAVFs. Methods Nineteen consecutive cases of CSdAVFs that underwent Rotational Angiography and transvenous embolization were reviewed. Multiplanar reconstruction images of Rotational Angiography and selective Angiography were reviewed with particular interest in the SPs. Relationships of the locations and number of SPs with the results of transvenous embolization were statistically analyzed. Results All cases showed SPs, with numbers ranging from 1 to 4 (mean, 2.2). The location of the SPs was “posteromedial” in 16, “posterolateral” in 13, “lateral” in 6, and “medial” in 3 patients. Six cases showed posteromedial SPs alone, and three cases showed posterolateral SPs alone. The other 10 cases showed multiple locations of SPs. All cases were treated by transvenous embolization with sinus packing ( n = 11) or selective embolization of the SP ( n = 8). Complete occlusion of dAVF was obtained in 16 cases immediately after embolization. Locations of SPs and drainage types were significantly associated with the immediate angiographic results ( p
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shunted pouches of cavernous sinus dural avfs evaluation by 3d Rotational Angiography
Neuroradiology, 2015Co-Authors: Hiro Kiyosue, Shuichi Tanoue, Norio Hongo, Yuzo Hori, Hiromu MoriAbstract:Introduction The aims of this study were to evaluate the angioarchitecture of cavernous sinus dural arteriovenous fistulas (CSdAVFs), including the number and location of shunted pouches (SPs), and to evaluate whether the location and number of the SPs affect the outcomes of transvenous embolization of CSdAVFs. Methods Nineteen consecutive cases of CSdAVFs that underwent Rotational Angiography and transvenous embolization were reviewed. Multiplanar reconstruction images of Rotational Angiography and selective Angiography were reviewed with particular interest in the SPs. Relationships of the locations and number of SPs with the results of transvenous embolization were statistically analyzed. Results All cases showed SPs, with numbers ranging from 1 to 4 (mean, 2.2). The location of the SPs was “posteromedial” in 16, “posterolateral” in 13, “lateral” in 6, and “medial” in 3 patients. Six cases showed posteromedial SPs alone, and three cases showed posterolateral SPs alone. The other 10 cases showed multiple locations of SPs. All cases were treated by transvenous embolization with sinus packing (n=11) or selective embolization of the SP (n=8). Complete occlusion of dAVF was obtained in 16 cases immediately after embolization. Locations of SPs and drainage types were significantly associated with the immediate angiographic results (p<0.01). Conclusion The SP of CSdAVFs is often multiple and islocated posteriorly to the CS. The number and location of SPs affect immediate angiographic results of transvenous embolization.
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Fusion imaging using subtracted and unsubtracted Rotational Angiography for pretherapeutic evaluation of dural arteriovenous fistulas.
Japanese journal of radiology, 2014Co-Authors: Shuichi Tanoue, Hiro Kiyosue, Hiromu Mori, Norio Hongo, Mika Okahara, Takeshi KuboAbstract:Purpose We describe the clinical utility of an imaging technique that combines 3D subtracted and unsubtracted Rotational Angiography for evaluation of the angioarchitecture of dural arteriovenous fistulas (DAVFs).
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Fusion image of subtracted and nonsubtracted Rotational Angiography for pretherapeutic evaluation of angioarchitectures of dural arteriovenous fistulas
2013Co-Authors: Hiro Kiyosue, Shuichi Tanoue, Junji Kashiwagi, Hiromu MoriAbstract:Poster: "ECR 2013 / C-2570 / Fusion image of subtracted and nonsubtracted Rotational Angiography for pretherapeutic evaluation of angioarchitectures of dural arteriovenous fistulas" by: "H. Kiyosue1, S. Tanoue1, J. Kashiwagi2, H. Mori2; 1YUFU/JP, 2Oita/JP"
Nikos Paragios - One of the best experts on this subject based on the ideXlab platform.
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Compressed Sensing Dynamic Reconstruction in Rotational Angiography
2012Co-Authors: Hélène Langet, Cyril Riddell, Yves Trousset, Arthur Tenenhaus, Elisabeth Lahalle, Gilles Fleury, Nikos ParagiosAbstract:This work tackles three-dimensional reconstruction of tomographic acquisitions in C-arm-based Rotational Angiography. The relatively slow rotation speed of C-arm systems involves motion artifacts that limit the use of three-dimensional imaging in interventional procedures. The main contribution of this paper is a reconstruction algorithm that deals with the temporal variations due to intra-arterial injections. Based on a compressed-sensing approach, we propose a multiple phase reconstruction with spatio-temporal constraints. The algorithm was evaluated by qualitative and quantitative assessment of image quality on both numerical phantom experiments and clinical data from vascular C-arm systems. In this latter case, motion artifacts reduction was obtained in spite of the cone-beam geometry, the short-scan acquisition, and the truncated and subsampled data.
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Compressed sensing subtracted Rotational Angiography with multiple sparse penalty
2012Co-Authors: Hélène Langet, Cyril Riddell, Yves Trousset, Arthur Tenenhaus, Elisabeth Lahalle, Gilles Fleury, Nikos ParagiosAbstract:Digital Subtraction Rotational Angiography (DSRA) is a clinical protocol that allows three-dimensional (3D) visualization of vasculature during minimally invasive procedures. C-arm systems that are used to generate 3D reconstructions in interventional radiology have limited sampling rate and thus, contrast resolution. To address this particular subsampling problem, we propose a novel iterative reconstruction algorithm based on compressed sensing. To this purpose, we exploit both spatial and temporal sparsity of DSRA. For computational efficiency, we use a proximal implementation that accommodates multiple '1-penalties. Experiments on both simulated and clinical data confirm the relevance of our strategy for reducing subsampling streak artifacts.
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ISBI - Compressed sensing subtracted Rotational Angiography with multiple sparse penalty
2012 9th IEEE International Symposium on Biomedical Imaging (ISBI), 2012Co-Authors: Hélène Langet, Cyril Riddell, Yves Trousset, Arthur Tenenhaus, Elisabeth Lahalle, Gilles Fleury, Nikos ParagiosAbstract:Digital Subtraction Rotational Angiography (DSRA) is a clinical protocol that allows three-dimensional (3D) visualization of vasculature during minimally invasive procedures. C-arm systems that are used to generate 3D reconstructions in interventional radiology have limited sampling rate and thus, contrast resolution. To address this particular subsampling problem, we propose a novel iterative reconstruction algorithm based on compressed sensing. To this purpose, we exploit both spatial and temporal sparsity of DSRA. For computational efficiency, we use a proximal implementation that accommodates multiple l 1 -penalties. Experiments on both simulated and clinical data confirm the relevance of our strategy for reducing subsampling streak artifacts.
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MICCAI (1) - Compressed sensing dynamic reconstruction in Rotational Angiography
Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Inte, 2012Co-Authors: Hélène Langet, Cyril Riddell, Yves Trousset, Arthur Tenenhaus, Elisabeth Lahalle, Gilles Fleury, Nikos ParagiosAbstract:This work tackles three-dimensional reconstruction of tomographic acquisitions in C-arm-based Rotational Angiography. The relatively slow rotation speed of C-arm systems involves motion artifacts that limit the use of three-dimensional imaging in interventional procedures. The main contribution of this paper is a reconstruction algorithm that deals with the temporal variations due to intra-arterial injections. Based on a compressed-sensing approach, we propose a multiple phase reconstruction with spatio-temporal constraints. The algorithm was evaluated by qualitative and quantitative assessment of image quality on both numerical phantom experiments and clinical data from vascular C-arm systems. In this latter case, motion artifacts reduction was obtained in spite of the cone-beam geometry, the short-scan acquisition, and the truncated and subsampled data.
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Compressed Sensing Based 3D Tomographic Reconstruction for Rotational Angiography
2011Co-Authors: Hélène Langet, Cyril Riddell, Yves Trousset, Arthur Tenenhaus, Elisabeth Lahalle, Gilles Fleury, Nikos ParagiosAbstract:In this paper, we address three-dimensional tomographic re-construction of Rotational Angiography acquisitions. In clinical routine, angular subsampling commonly occurs, due to the technical limitations of C-arm systems or possible improper injection. Standard methods such as ltered backprojection yield a reconstruction that is deteriorated by subsampling artifacts, which potentially hampers medical interpretation. Recent developments of compressed sensing have demonstrated that it is possible to signi cantly improve reconstruction of subsampled datasets by generating sparse approximations through '1-penalized minimization. Based on these results, we present an extension of the iterative ltered backprojection that includes a sparsity constraint called soft background subtraction. This approach is shown to provide subsampling artifact reduction when reconstructing sparse objects, and more interestingly, when reconstructing sparse objects over a non-sparse background. The relevance of our approach is evaluated in cone beam geometry on real clinical data.
Hiro Kiyosue - One of the best experts on this subject based on the ideXlab platform.
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Shunted pouches of cavernous sinus dural AVFs: evaluation by 3D Rotational Angiography
Neuroradiology, 2015Co-Authors: Hiro Kiyosue, Shuichi Tanoue, Norio Hongo, Yuzo Hori, Hiromu MoriAbstract:Introduction The aims of this study were to evaluate the angioarchitecture of cavernous sinus dural arteriovenous fistulas (CSdAVFs), including the number and location of shunted pouches (SPs), and to evaluate whether the location and number of the SPs affect the outcomes of transvenous embolization of CSdAVFs. Methods Nineteen consecutive cases of CSdAVFs that underwent Rotational Angiography and transvenous embolization were reviewed. Multiplanar reconstruction images of Rotational Angiography and selective Angiography were reviewed with particular interest in the SPs. Relationships of the locations and number of SPs with the results of transvenous embolization were statistically analyzed. Results All cases showed SPs, with numbers ranging from 1 to 4 (mean, 2.2). The location of the SPs was “posteromedial” in 16, “posterolateral” in 13, “lateral” in 6, and “medial” in 3 patients. Six cases showed posteromedial SPs alone, and three cases showed posterolateral SPs alone. The other 10 cases showed multiple locations of SPs. All cases were treated by transvenous embolization with sinus packing ( n = 11) or selective embolization of the SP ( n = 8). Complete occlusion of dAVF was obtained in 16 cases immediately after embolization. Locations of SPs and drainage types were significantly associated with the immediate angiographic results ( p
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shunted pouches of cavernous sinus dural avfs evaluation by 3d Rotational Angiography
Neuroradiology, 2015Co-Authors: Hiro Kiyosue, Shuichi Tanoue, Norio Hongo, Yuzo Hori, Hiromu MoriAbstract:Introduction The aims of this study were to evaluate the angioarchitecture of cavernous sinus dural arteriovenous fistulas (CSdAVFs), including the number and location of shunted pouches (SPs), and to evaluate whether the location and number of the SPs affect the outcomes of transvenous embolization of CSdAVFs. Methods Nineteen consecutive cases of CSdAVFs that underwent Rotational Angiography and transvenous embolization were reviewed. Multiplanar reconstruction images of Rotational Angiography and selective Angiography were reviewed with particular interest in the SPs. Relationships of the locations and number of SPs with the results of transvenous embolization were statistically analyzed. Results All cases showed SPs, with numbers ranging from 1 to 4 (mean, 2.2). The location of the SPs was “posteromedial” in 16, “posterolateral” in 13, “lateral” in 6, and “medial” in 3 patients. Six cases showed posteromedial SPs alone, and three cases showed posterolateral SPs alone. The other 10 cases showed multiple locations of SPs. All cases were treated by transvenous embolization with sinus packing (n=11) or selective embolization of the SP (n=8). Complete occlusion of dAVF was obtained in 16 cases immediately after embolization. Locations of SPs and drainage types were significantly associated with the immediate angiographic results (p<0.01). Conclusion The SP of CSdAVFs is often multiple and islocated posteriorly to the CS. The number and location of SPs affect immediate angiographic results of transvenous embolization.
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Fusion imaging using subtracted and unsubtracted Rotational Angiography for pretherapeutic evaluation of dural arteriovenous fistulas.
Japanese journal of radiology, 2014Co-Authors: Shuichi Tanoue, Hiro Kiyosue, Hiromu Mori, Norio Hongo, Mika Okahara, Takeshi KuboAbstract:Purpose We describe the clinical utility of an imaging technique that combines 3D subtracted and unsubtracted Rotational Angiography for evaluation of the angioarchitecture of dural arteriovenous fistulas (DAVFs).
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Fusion image of subtracted and nonsubtracted Rotational Angiography for pretherapeutic evaluation of angioarchitectures of dural arteriovenous fistulas
2013Co-Authors: Hiro Kiyosue, Shuichi Tanoue, Junji Kashiwagi, Hiromu MoriAbstract:Poster: "ECR 2013 / C-2570 / Fusion image of subtracted and nonsubtracted Rotational Angiography for pretherapeutic evaluation of angioarchitectures of dural arteriovenous fistulas" by: "H. Kiyosue1, S. Tanoue1, J. Kashiwagi2, H. Mori2; 1YUFU/JP, 2Oita/JP"
W.j. Van Rooij - One of the best experts on this subject based on the ideXlab platform.
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Current Hospital Demographics of Subarachnoid Hemorrhage Based on CT Angiography and 3D Rotational Angiography in a Neurosurgical Center.
AJNR. American journal of neuroradiology, 2019Co-Authors: S.b.t. Van Rooij, R.s. Bechan, W.j. Van Rooij, Marieke E.s. SprengersAbstract:BACKGROUND AND PURPOSE: Aneurysmal subarachnoid hemorrhage is an important cause of mortality and morbidity. Modern hospital demographics are scarce. We evaluated the diagnosis and treatment of patients with SAH in a neurosurgical referral center. MATERIALS AND METHODS: Between March 2013 and April 2015, two hundred eighty-four patients with SAH diagnosed on CT or lumbar puncture were admitted. All patients underwent 64– to 128–detector row CT Angiography. Additional imaging was with 3D Rotational Angiography of all vessels. In patients with aneurysms, characteristics and mode of treatment were recorded. RESULTS: In 197 of 220 patients with an aneurysmal bleeding pattern, we found a cause of the bleeding: One hundred ninety-five patients had a ruptured aneurysm (98%); 1 patient, a micro-AVM; and 1 patient, reversible vasoconstriction syndrome. Of 195 ruptured aneurysms, 6 were dissecting aneurysms and 3 were AVM-associated flow aneurysms. In 23 of 204 patients (11%) with an aneurysmal bleeding pattern and 3D Rotational Angiography performed, no cause was found. In 8 of 9 patients (89%) with lumbar puncture positive for SAH but CT negative for it, no cause was found. Of 180 patients with a ruptured aneurysm eligible for treatment, 147 (82%) were treated endovascularly and 30 aneurysms (17%) were clipped. Of 204 patients with an aneurysmal bleeding pattern and 3D Rotational Angiography, 72 (35%) had multiple aneurysms. These 72 patients had, altogether, 117 additional aneurysms, of which 24 (21%) were treated by either coiling or clipping. CONCLUSIONS: This study provides robust data on hospital demographics of SAH in a neurosurgical referral center, based on CTA and 3D Rotational Angiography of all vessels.
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CT Angiography versus 3D Rotational Angiography in patients with subarachnoid hemorrhage.
Neuroradiology, 2015Co-Authors: R.s. Bechan, S.b.t. Van Rooij, Marieke E.s. Sprengers, J.p. Peluso, Menno Sluzewski, Charles B. L. M. Majoie, W.j. Van RooijAbstract:Introduction CT Angiography (CTA) is increasingly used as primary diagnostic tool to replace digital subtraction Angiography (DSA) in patients with subarachnoid hemorrhage (SAH). However, 3D Rotational Angiography (3DRA) has substituted DSA as a reference standard. In this prospective observational study, we compare CTA with 3DRA of all cerebral vessels in a large cohort of patients with SAH.
Hélène Langet - One of the best experts on this subject based on the ideXlab platform.
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Compressed Sensing Dynamic Reconstruction in Rotational Angiography
2012Co-Authors: Hélène Langet, Cyril Riddell, Yves Trousset, Arthur Tenenhaus, Elisabeth Lahalle, Gilles Fleury, Nikos ParagiosAbstract:This work tackles three-dimensional reconstruction of tomographic acquisitions in C-arm-based Rotational Angiography. The relatively slow rotation speed of C-arm systems involves motion artifacts that limit the use of three-dimensional imaging in interventional procedures. The main contribution of this paper is a reconstruction algorithm that deals with the temporal variations due to intra-arterial injections. Based on a compressed-sensing approach, we propose a multiple phase reconstruction with spatio-temporal constraints. The algorithm was evaluated by qualitative and quantitative assessment of image quality on both numerical phantom experiments and clinical data from vascular C-arm systems. In this latter case, motion artifacts reduction was obtained in spite of the cone-beam geometry, the short-scan acquisition, and the truncated and subsampled data.
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Compressed sensing subtracted Rotational Angiography with multiple sparse penalty
2012Co-Authors: Hélène Langet, Cyril Riddell, Yves Trousset, Arthur Tenenhaus, Elisabeth Lahalle, Gilles Fleury, Nikos ParagiosAbstract:Digital Subtraction Rotational Angiography (DSRA) is a clinical protocol that allows three-dimensional (3D) visualization of vasculature during minimally invasive procedures. C-arm systems that are used to generate 3D reconstructions in interventional radiology have limited sampling rate and thus, contrast resolution. To address this particular subsampling problem, we propose a novel iterative reconstruction algorithm based on compressed sensing. To this purpose, we exploit both spatial and temporal sparsity of DSRA. For computational efficiency, we use a proximal implementation that accommodates multiple '1-penalties. Experiments on both simulated and clinical data confirm the relevance of our strategy for reducing subsampling streak artifacts.
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ISBI - Compressed sensing subtracted Rotational Angiography with multiple sparse penalty
2012 9th IEEE International Symposium on Biomedical Imaging (ISBI), 2012Co-Authors: Hélène Langet, Cyril Riddell, Yves Trousset, Arthur Tenenhaus, Elisabeth Lahalle, Gilles Fleury, Nikos ParagiosAbstract:Digital Subtraction Rotational Angiography (DSRA) is a clinical protocol that allows three-dimensional (3D) visualization of vasculature during minimally invasive procedures. C-arm systems that are used to generate 3D reconstructions in interventional radiology have limited sampling rate and thus, contrast resolution. To address this particular subsampling problem, we propose a novel iterative reconstruction algorithm based on compressed sensing. To this purpose, we exploit both spatial and temporal sparsity of DSRA. For computational efficiency, we use a proximal implementation that accommodates multiple l 1 -penalties. Experiments on both simulated and clinical data confirm the relevance of our strategy for reducing subsampling streak artifacts.
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MICCAI (1) - Compressed sensing dynamic reconstruction in Rotational Angiography
Medical image computing and computer-assisted intervention : MICCAI ... International Conference on Medical Image Computing and Computer-Assisted Inte, 2012Co-Authors: Hélène Langet, Cyril Riddell, Yves Trousset, Arthur Tenenhaus, Elisabeth Lahalle, Gilles Fleury, Nikos ParagiosAbstract:This work tackles three-dimensional reconstruction of tomographic acquisitions in C-arm-based Rotational Angiography. The relatively slow rotation speed of C-arm systems involves motion artifacts that limit the use of three-dimensional imaging in interventional procedures. The main contribution of this paper is a reconstruction algorithm that deals with the temporal variations due to intra-arterial injections. Based on a compressed-sensing approach, we propose a multiple phase reconstruction with spatio-temporal constraints. The algorithm was evaluated by qualitative and quantitative assessment of image quality on both numerical phantom experiments and clinical data from vascular C-arm systems. In this latter case, motion artifacts reduction was obtained in spite of the cone-beam geometry, the short-scan acquisition, and the truncated and subsampled data.
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Compressed Sensing Based 3D Tomographic Reconstruction for Rotational Angiography
2011Co-Authors: Hélène Langet, Cyril Riddell, Yves Trousset, Arthur Tenenhaus, Elisabeth Lahalle, Gilles Fleury, Nikos ParagiosAbstract:In this paper, we address three-dimensional tomographic re-construction of Rotational Angiography acquisitions. In clinical routine, angular subsampling commonly occurs, due to the technical limitations of C-arm systems or possible improper injection. Standard methods such as ltered backprojection yield a reconstruction that is deteriorated by subsampling artifacts, which potentially hampers medical interpretation. Recent developments of compressed sensing have demonstrated that it is possible to signi cantly improve reconstruction of subsampled datasets by generating sparse approximations through '1-penalized minimization. Based on these results, we present an extension of the iterative ltered backprojection that includes a sparsity constraint called soft background subtraction. This approach is shown to provide subsampling artifact reduction when reconstructing sparse objects, and more interestingly, when reconstructing sparse objects over a non-sparse background. The relevance of our approach is evaluated in cone beam geometry on real clinical data.
