Login
Communauté Vinci
Extérieur
Si votre nom d'utilisateur ne se termine pas par @vinci.be ou @student.vinci.be, utilisez le formulaire ci-dessous pour accéder à votre compte de lecteur.
Titre : | Intérêt du scanner des rochers dans la mise au point de la surdité |
Auteurs : | Aurore NGIMA, Auteur ; Jean-Philippe Van Damme, Promoteur |
Type de document : | Travail de fin d'études |
Editeur : | Woluwe-Saint-Lambert : Haute École Léonard de Vinci, 2021 |
Langues: | Français |
Index. décimale : | TFE - Imagerie médicale |
Résumé : |
Although computed tomography (CT) has been used for many years to study otological pathologies inducing hearing loss, research appears to document more about the effectiveness of magnetic resonance imaging (MRI) methods for this study.
What type of medical imaging examination is suitable for clinical situations frequently encountered in otology? Is there an interest in the cooperation of computed tomography with another imaging technique such as magnetic resonance imaging? Haute Ecole Léonard de Vinci Institut Paul Lambin Département dimagerie médicale Année académique 2020-2021 Two groups of patients with progressive deafness were studied and compared in the type of imaging used to determine the location and the cause of the lesion: patients for whom only CT was used and patients for whom an MRI was also used. After the appointment with the otorhinolaryngologist, an opinion on the symptoms and a diagnosis was ventured. The doctor defined for each patient whether he suffers from conductive or sensorineural hearing loss and if a CT scan is qualified to observe the lesion. For three patients out of fifteen, the CT scan did not confirm the presence of a middle ear lesion or did not enable doctors to identify the disease. However, 80% of CT scan images (based on a sample with fifteen patients) were able to accurately determine the extent of the lesion in the middle ear. Computed tomography, due to the high spatial resolution of the bone structures, remains the method of choice for the evaluation of pathological lesions of the middle ear; the ease of use and the sensitivity it offers to experts in detecting and defining the extent of lesions remain high. Unfortunately, unlike the MRI, it is less qualified in the case of pathologies affecting the inner ear or in the case of patients who have already undergone a surgical procedure of the ear because it is not possible to differentiate scar tissue over inflammatory tissue and tissue with a fluid composition. Moreover, it is not possible to observe nerve structures and blood vessels. Due to the intensity of the gray scale measured in the Hounsfield unit [HU], the CT scan cannot be used to distinguish these tissues. To conclude, computed tomography (CT) and magnetic resonance imaging (MRI) can be effective techniques to improve and facilitate doctors to give their diagnosis in order to treat patients with progressive deafness. Despite that, CT scan seems more effective at finding the cause of a patient's conductive hearing loss and MRI at finding the cause of a patient's sensorineural hearing loss. It is often necessary to couple these two imaging techniques because the association of images from each of them combines their advantages and helps specialists to identify pathology and/or plan surgery. |
Accès : | Identifiez-vous avant d'accéder au document électronique |
Disponible en ligne : | Oui |
Lieu du stage : | Cliniques Universitaires Saint - Luc |
Département : | Imagerie médicale |
Documents numériques (1)
Ce document n'est visible qu'après identification
TFE imagerie médicale Adobe Acrobat PDF |