WorldCat Identities

Attyé, Arnaud

Works: 23 works in 23 publications in 2 languages and 39 library holdings
Roles: Author, Thesis advisor, Other, Contributor, Interviewee
Publication Timeline
Most widely held works by Arnaud Attyé
Spontaneous Cerebrospinal Fluid Rhinorrhea: Association with Body Weight and Imaging Data( )

1 edition published in 2017 in English and held by 2 WorldCat member libraries worldwide

Imagerie des surdités post traumatiques by Olivier Maillot( )

1 edition published in 2016 in French and held by 2 WorldCat member libraries worldwide

Les surdités sont une complication classique après un traumatisme crânien. Il faudra distinguer les surdités de transmission, des surdités de perception, qui n'impliquent pas les mêmes lésions. Les surdités de transmission, lorsqu'elles persistent après résorption de l'hémotympan et cicatrisation de la membrane tympanique doivent être explorées par tomodensitométrie des rochers. Cet examen recherche une atteinte de la chaine ossiculaire, maillon essentiel à la transmission des ondes auditives. Les lésions rencontrées sont principalement des luxations. Les luxations incudo malléaires sont les plus fréquemment retrouvées dans notre étude comme dans les autres séries radiologiques alors que les luxations incudo stapédiennes sont les plus fréquentes selon les séries chirurgicales. Ceci est probablement lié à la petite taille de cette dernière, qui la rend difficile à explorer en imagerie notamment en cas de persistance de l'hémotympan. Les autres atteintes, dislocations et fractures d'osselets sont plus rares. La moitié des patients présentant une surdité de transmission avec fracture de l'os temporal au scanner a une lésion scannographique de la chaine ossiculaire. Les reconstructions tridimensionnelles de la chaine ossiculaire permettent d'augmenter la sensibilité diagnostique du scanner dans la détection des luxations ossiculaires. Les surdités de perception sont consécutives à une atteinte de l'oreille interne ou des voies auditives centrales. Le scanner est utile pour rechercher des signes de fistules périlymphatiques, le principal étant le pneumolabyrinthe. Il recherche aussi une atteinte directe des fenêtres ronde et ovale par le trait de fracture. Cet examen sera obligatoirement compléter par une IRM de l'oreille interne et de l'encéphale. Celle ci peut mettre en évidence une hémorragie intra labyrinthique grâce aux séquences FLAIR qui montreront alors un hypersignal T2 intra labyrinthique. Dans le même temps, l'IRM permet une exploration du cortex auditif et voies auditives centrales qui s'ils sont affectés peuvent être responsable d'une agnosie auditive
Facial nerve tractography: A new tool for the detection of perineural spread in parotid cancers by René-Charles Rouchy( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

Central auditory pathways study using Magnetic Resonance Imaging by Arnaud Attyé( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

Sensorineural hearing loss (SNHL) is a common functional disorder in humans. Besides clinical investigations, magnetic resonance imaging (MRI) is the modality of choice to explore the central auditory pathways. Indeed, new MRI sequences and postprocessing methods have revolutionized our understanding of inner ear and brain disorders.The inner ear is the organ of sound detection and balance. Within the inner ear, there are two distinct compartments filled with endolymph and perilymph.The accumulation of endolymph fluid is called “endolymphatic hydrops”. Endolymphatic hydrops may occur as a consequence of a variety of disorders, including Meniere's Disease, immune-mediated diseases or internal auditory canal tumors.Previous classification for grading the amount of endolymph liquid using MRI has proposed a global semi-quantitative evaluation, without distinguishing the utricle from the saccule, whose biomechanical properties are different in terms of compliance.This work had two main objectives: 1°) to better characterize the role of endolymphatic hydrops in SNHL occurrence; 2°) to study secondary auditory pathways alterations.Part 1: Understanding the role and pathophysiology of endolymphatic hydrops in SNHL occurrence.Endolymphatic hydrops can be identified using MRI, acquired 4-6-hours after injection of contrast media. This work has demonstrated the feasibility and improved this technique in a clinical setting.Using optimized morphological sequences, we were able to illustrate inner ear microanatomy based on temporal bone dissection, and to distinguish the saccule and the utricle.In accordance with a multi-compartmental model, we observed that the saccular hydrops was a specific biomarker of low-tone SNHL in the context of typical or atypical forms of Meniere's Disease. In addition, utricular hydrops was linked to the degree of hearing loss in patients with schwannomas. We raise the hypothesis that both saccule and utricle compartment play the role of a buffer in endolymph reabsorption. When their compliance is overstretched, inner ear endolymph regulation fails, subsequently leading to cochlear lesions such as loss of the shorter stereocilia of the hair cells, as suggested by experimental animal modelsThus, we were able to prove the high prevalence of endolymphatic hydrops in patients with SNHL.Part 2: Development of new imaging biomarkers to study the central auditory pathways.Diffusion-Weighted Imaging play a crucial role because it can help to assess the intracellular compartment by displaying the Brownian movements of water molecules. In the context of cochlear lesions, anterograde axonal degeneration has only been demonstrated in animal models. In the context of retrocochlear lesions, no MRI sequences have previously showed efficiency in distinguishing the cochlear from the facial nerve. This is crucial for safe surgery procedure.We have designed optimized postprocessing tools to explore SNHL patients with High-Angular Resolution DWI acquisition. We have included in the clinical setting software tools for B0 and B1 bias field artifacts' correction, Denoising process, Gibbs artifacts' correction, Susceptibility and Eddy Current artifacts management.The ultimate goal was to properly study the Fiber Orientation Distribution (FOD) along the auditory pathways in case-controlled studies, using top-of-the-art methods of fixels analysis and a newly developed toolbox with Machine Learning analysis of the Diffusion signal.We have studied reproducibility of these two methods on Multi-Shell Diffusion gradient scheme by test-retest procedure. We have then used the fixel method to seek for auditory pathways alterations in Meniere's Disease and Machine Learning automatic analyses to extract Inner Auditory Canal cranial nerves.Thus, we have developed a new method for cranial nerves' tractography using FOD spectral clustering, efficient in terms of computer requirement and in tumor condition
A simplified CT-guided approach for greater occipital nerve infiltration in the management of occipital neuralgia by Adrian Kastler( )

1 edition published in 2015 in English and held by 2 WorldCat member libraries worldwide

Data sharing improves scientific publication: example of the "hydrops initiative" by Arnaud Attyé( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

The bright spot sign : a new MR morphological sign to early diagnose arteritic anterior ischemic optic neuropathy due to giant cell arteritis by Perrine Remond( )

1 edition published in 2017 in English and held by 2 WorldCat member libraries worldwide

Purpose: A rapid determination of the anterior ischemic optic neuropathy (AION) etiology is crucial as it determines the therapeutic management. In this study, we assess MRI to study the optic nerve head in patients referred with AION either due to giant cell arteritis (GCA-AION), or due to the nonarteritic form of the disease (NA-AION), compared with healthy subjects. Methods: Fifteen patients with GCA-AION and 15 patients with N-AION were prospectively included from May 2015 to January 2016 in two medical centers. Healthy subjects and patients had undergone a contrast-enhanced, flow-compensated, 3DT1-weighted MRI scan. Bright spot sign was defined by a local optic nerve head enhancement in a three-point scale. The bright spot sign was defined as an optic nerve head enhancement using a three-grade ranking system. Two radiologists and one ophthalmologist independently performed blind evaluations of MRI sequences using this scale. Statistical analysis included inter-observer agreement. Results: MR imaging scores were significantly higher in patients with GCA-AION than in patients with NAION (pd".05). The bright spot sign was observed in all patients (15/15) with GCA-AION and in 7/15 patients with AION. In healthy subjects, no enhancement of the anterior part of the optic nerves including the optic nerve head was observed. There was a significant relationship between the side of the bright spot and the side of the AION (pd"0.001). The inter-reader agreement was good for observers (k= 0.815). Conclusion: AION is an ocular emergency, in context of GCA that requires early diagnosis and immediate treatment to prevent further visual loss. In this study, we provide evidence for a new MRI sign that identifies the acute stage of GCA-AION, the bright spot sign was observed in all patients with GCA. In contrast, patients without the bright spot sign always presented with a non-arteritic pathophysiology and therefore did not require emergency corticosteroid therapy
In vivo imaging of saccular hydrops in humans reflects sensorineural hearing loss rather than Meniere's disease symptoms by Arnaud Attyé( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

Facet joint syndrome: from diagnosis to interventional management by Romain Perolat( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

MRI of endolymphatic hydrops in patients with Meniere's disease: a case-controlled study with a simplified classification based on saccular morphology by Arnaud Attyé( )

1 edition published in 2016 in English and held by 2 WorldCat member libraries worldwide

Volumétrie de l'ischémie cérébrale en IRM de diffusion et déficit fonctionnel secondaire après thrombolyse intraveineuse by Arnaud Attyé( Book )

1 edition published in 2011 in French and held by 2 WorldCat member libraries worldwide

Objectif : Tenter d'établir une corrélation entre l'évolution du volume de l'ischémie cérébrale sur les séquences de diffusion avant et après thrombolyse et la récupération clinique fonctionnelle à 3 mois évaluée à l'aide du score de Rankin. Méthodes : Calcul de l'évolution en volume de l'infarctus cérébral avec un logiciel de volumétrie automatique. Le devenir clinique des patients a été évalué à 3 mois à l'aide du score de Rankin. Une analyse de régression univariée a été effectuée pour rechercher un lien entre l'évolution de l'infarctus et le handicap à 3 mois. (Rankin > 1). Résultats : 69 patients ont été inclus dans l'étude avec IRM initiale et de suivi à 24h. Le score NIHSS médian initial était de 10,5 et de 7 à 24 heures. A 3 mois, 51, 72% des patients ne présentaient pas de handicap fonctionnel (Rankin ≤ 1). Le volume moyen de l'ischémie avant thrombolyse était de 19,75 cm3, de 46,13 cm3 après thrombolyse. Pour une croissance de volume ischémie < 10 cm3, l'Odds Ratio pour une absence de handicap fonctionnel à 3 mois est de 10,08 (IC à 95%, 3-33,89). Conclusion : Une diminution, ou une augmentation <10 cm3, de la taille de l'infarctus cérébral ischémique après thrombolyse IV est significativement associée à une absence de handicap fonctionnel à 3 mois
Parotid gland tumours: MR tractography to assess contact with the facial nerve by Arnaud Attyé( )

1 edition published in 2015 in English and held by 2 WorldCat member libraries worldwide

Post traumatic deafness: a pictorial review of CT and MRI findings by Olivier Maillot( )

1 edition published in 2016 in English and held by 2 WorldCat member libraries worldwide

Detection of intralabyrinthine abnormalities using post-contrast delayed 3D-FLAIR MRI sequences in patients with acute vestibular syndrome by Michael Eliezer( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

Recurrent peripheral vestibulopathy: Is MRI useful for the diagnosis of endolymphatic hydrops in clinical practice? by Arnaud Attyé( )

1 edition published in 2015 in English and held by 2 WorldCat member libraries worldwide

IRM de diffusion dans les cancers du larynx : où en est-on ? by Anne Coffre( )

1 edition published in 2017 in French and held by 2 WorldCat member libraries worldwide

Introduction : L'objectif de cette revue scientifique est d'évaluer l'intérêt de l'IRM de diffusion pour le diagnostic initial, la prédiction de la réponse au traitement et l'évaluation post-thérapeutique des cancers laryngés. Méthode : Une revue systématique de la littérature scientifique a été réalisée analysant les articles publiés entre 2004 et 2017. Résultats : Dix articles ont rempli les critères d'inclusion. Toutes les études ont retrouvé un coefficient de diffusion apparent (CDA) significativement plus élevé dans les lésions bénignes comparé aux malignes. Les seuils optimaux pour différencier ces lésions étaient variables d'une étude à l'autre. Pour le bilan étiologique des lésions laryngées, la précision diagnostique variait de 85 à 92,9%. Le delta CDA entre IRM initiale et IRM au cours du traitement permettait de prédire la réponse avec une précision diagnostique de 94%. Pour l'évaluation post-thérapeutique, la diffusion permettait de différencier une récurrence d'une lésion bénigne induite par les traitements avec une précision diagnostique allant de 78 à 96,2%. Conclusion : L'IRM de diffusion a montré une précision diagnostique élevée dans l'évaluation des cancers laryngés. Cependant, peu d'études se sont spécifiquement concentrées sur le larynx, et les seuils de CDA obtenus étaient variables et peu comparables. L'intérêt principal de la diffusion résidait dans l'évaluation au cours du traitement. Elle semblait également intéressante dans l'évaluation post-thérapeutique. En revanche, elle n'apportait pas elle n'apportait pas de valeur ajoutée dans le bilan étiologique d'une tumeur laryngée primaire. Des études complémentaires sont nécessaires
Structural MRI findings in head injury at acute and sub acute stages by Aurélie Delouche( )

1 edition published in 2014 in English and held by 1 WorldCat member library worldwide

Les traumatismes crâniens représentent une large cause de handicaps et de décès. Ces dernières années, les techniques d'imagerie ont beaucoup évoluées, permettant d'approfondir les connaissances sur leur physiopathologie et d'apporter des données diagnostiques et pronostiques. L'objectif de ce travail consiste à faire une revue de la littérature sur l'intérêt de l'imagerie structurale par résonnance magnétique. Après une description des principales lésions cérébrales primaires (lésion axonale diffuse, contusion corticale et saignements extra axiaux) et secondaires, nous avons discuté des apports diagnostiques et pronostiques des séquences conventionnelles IRM (en pondérationT2, T1, FLAIR, T2* Echo de gradient et de diffusion). Puis nous nous sommes intéressés aux techniques IRM récentes permettant la détection accrue des lésions hémorragiques (séquence de susceptibilité magnétique, SWI), des atteintes structurales de la substance blanche (tenseur de diffusion, DTI) et des anomalies métaboliques (spectroscopie par résonance magnétique). En résumé, l'IRM est un outil diagnostique et pronostique majeur dans les traumatismes crâniens. Son manque de disponibilité et les difficultés de monitoring de patients instables représentent les principaux facteurs limitant son utilisation au stade hyper aigu du traumatisme crânien. Mais au stade aigu d'un traumatisme crânien léger à modéré, et au stade sub aigu d'un traumatisme crânien grave, l'IRM permet la détection de lésions subtiles et de facteurs pronostiques
Cancers parotidiens : détection de l'extension périneurale au nerf facial en tractographie IRM by René-Charles Rouchy( )

1 edition published in 2017 in French and held by 1 WorldCat member library worldwide

Objectives: The objective of this prospective study was to determine whether MR tractography of the facial nerve (VIIn) is useful in detecting perineural spread (PNS) in parotid cancers. Methods: 30 patients with surgically managed parotid tumors (15 malignant, 15 benign tumors), who had undergone 3T-MRI with diffusion acquisition and post-processing constrained spherical deconvolution-based tractography, were included and compared with 15 healthy volunteers. The parameters of the diffusion-weighted sequences were b-value of 1000s/mm2, 32 directions. Two radiologists performed a blinded visual reading of tractographic maps and graded the VIIn average pathlength (AP) and fractional anisotropy (FA). We also compared diagnostic accuracy of tractography with morphological MRI sequences to detect PNS. Results: AP was significantly higher in cases with PNS (39.86mm [Quartile1: 36.27; Quartile3: 51.19]) versus cases without (16.23mm [12.90; 24.90]), p≤0.001. 27.36mm was the threshold above which there was a significantly association with PNS (Se:100%; Sp:84%; AUC: 0.96 IC95[0.904;1]). Intra- and interclass correlation coefficients were excellent (≈1). FA did not identify cases with PNS. Tractography maps visual analyses directly displayed PNS in distal neural ramifications with a sensitivity of 75%, versus 50% using morphological sequences. Conclusions: This study suggests that tractography could be used to identify VIIn PNS by parotid cancers
Les gestes quotidiens de l'ORL octobre 2016( Visual )

1 edition published in 2016 in French and held by 1 WorldCat member library worldwide

Intérêt de la réduction de dimension pour évaluation de la fibrose hépatique en échographie : approche radiomique basée sur les contours du foie by Yann Teyssier( )

1 edition published in 2019 in French and held by 1 WorldCat member library worldwide

Purpose: Hepatic fibrosis assessment is a challenge for chronic liver disease medical care. The goal of this study was to investigate the performance of a dimensionality reduction model to assess significant hepatic fibrosis, based on radiomics extracted from ultrasonographic (US) images of liver surface. Methods: ln this retrospective study, 114 patients with a liver biopsy for liver disease or disorder, or a clinically diagnosed cirrhosis, had an US examination of the liver surface. After liver edge segmentation and radiomics extraction, images were analyzed using dimensionality reduction algorithm UMAP (Uniform Manifold Approximation and Projection) to distinguish non-significant (group G0 = F0-1) from significant fibrosis (G1 = F2-4), with probability density maps. Using area under receiver operating characteristic curve (AUROC) estimation, results were compared to the expert radiologist subjective reading, to transient elastography (Fibroscan®) and to a home software for automated surface irregularities assessment. Results: 109 patients (G0: n0=56; G1: n1=53) were analyzed using UMAP. Using 3 dimensions reduction, global precision of unsupervised learning classification was 67% (G0: 69%; G1: 64%). AUROC was 0.76, better than the expert interpretation (0.67, p=0.02), but not different from Fibroscan® (0.8, p=0.483) or from the software (0.8, p=0.17). Conclusion: Dimensionality reduction classification allows performances that are not different from the state-of-the-art classification techniques. UMAP density maps establish an atlas to which non-radiologic data can be added, in order to develop a predictive tool of hepatic fibrosis evolution
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Arnaud Attye onderzoeker

English (14)

French (6)