ABSTRACT
Over the last several years, specific radiological techniques have been used for the analysis of the central nervous system pathways. They involve a magnetic resonance sequence called diffusion tensor imaging. In order to process the data provided by this sequence it is necessary to use software that can post-process the image and render three-dimensional images of the central nervous system pathways. Thanks to this sequence it has been possible to isolate over the years many nerve pathways that cross the brain tissue, particularly those which occupy a significant space. This sequence could have a large variety of uses, such as helping with the study of brain anatomy, assisting with surgery planning, or establishing a relationship between the nerve fibers and tumoral lesions. However, there has been an increasing number of cases that report a low reliability related to the tractographic representation of this technique. Our goal with this article is to analyse a specific nerve pathway, the piramidal tract, in order to assess the coherence between the images obtained and the anatomy that is already known from the perspective of the radiological image, and to compare this tract between different patients.
Subject(s)
Diffusion Tensor Imaging/methods , Imaging, Three-Dimensional/methods , Pyramidal Tracts/diagnostic imaging , Brain/diagnostic imaging , Female , Humans , Male , Middle Aged , Reproducibility of Results , Young AdultABSTRACT
La hipertensión intracraneal idiopática es un síndrome neurológico caracterizado por síntomas y signos de hipertensión intracraneal en ausencia de lesión estructural o de hidrocefalia. En general, autolimitada, aunque con frecuencia recidiva. El diagnóstico se basa en la medición de la presión del líquido cefalorraquídeo que se eleva por encima de 250 mm de H2O. Normalmente los resultados del examen neurológico son normales excepto por la aparición de papiledema y posible afectación del VI par. La principal complicación es la pérdida visual que puede ser irreversible. El tratamiento se basa en la repetición de punciones lumbares evacuadoras combinado con el uso de diuréticos y dieta hipocalórica. Con la aparición de la resonancia magnética se han descrito varios signos asociados a esta enfermedad como son la disminución del tamaño ventricular, el incremento del espacio subaracnoideo, la presencia de silla turca vacía, distensión del espacio perióptico y realce tras contraste de los nervios ópticos.
