{"id":5309,"date":"2011-01-02T23:32:30","date_gmt":"2011-01-02T22:32:30","guid":{"rendered":"http:\/\/catai.net\/blog\/\/?p=5309"},"modified":"2011-01-04T14:49:47","modified_gmt":"2011-01-04T13:49:47","slug":"tractografia-dti","status":"publish","type":"post","link":"https:\/\/catai.net\/blog\/2011\/01\/tractografia-dti\/","title":{"rendered":"Tractografia (DTI)"},"content":{"rendered":"<p>Una tractograf\u00eda es un procedimiento que se usa para poner de manifiesto los  tractos neurales utilizandot\u00e9cnicas especiales de imagen por resonancia  magn\u00e9tica y an\u00e1lisis de  im\u00e1genes asistido por ordenador. El resultado se presenta en im\u00e1genes de 2 y 3  dimensiones.<\/p>\n<p>Las secuencias que se utilizan en la RM observan la simetr\u00eda de la difusi\u00f3n del  agua en el cerebro. Los haces de tractos de fibras hacen que el agua se difunda  asim\u00e9tricamente en un tensor siendo el eje mayor paralelo a la direcci\u00f3n de las  fibras. A esta asimetr\u00eda se la conoce como anisotrop\u00eda. Se da una relaci\u00f3n  directa entre el n\u00famero de fibras y el grado de anisotrop\u00eda.<\/p>\n<p>Las secuencias de resonancia magn\u00e9tica usadas para mostrar los tractos nerviosos  detectan la asimetr\u00eda de la difusi\u00f3n del agua en el cerebro.<\/p>\n<p>La tractograf\u00eda se lleva a cabo utilizando una  t\u00e9cnica de RM conocida como <strong>&#8220;Imagen Ponderada por Difusi\u00f3n&#8221;<\/strong>, que es sensible a  la difusi\u00f3n del agua en el cuerpo de forma que se puede utilizar para mostrar su  imagen tridimensonal. La difusi\u00f3n libre del agua tiene lugar en estas  condiciones en todas las direcciones posibles. A esto se le llama difusi\u00f3n  &#8220;isotr\u00f3pica&#8221;. Si el agua difunde en un medio con barreras, la difusi\u00f3n deja de  ser uniforme, pasando a ser &#8220;anisotr\u00f3pica&#8221;. En tal caso, la movilidad relativa  de las mol\u00e9culas a partir del origen tendr\u00e1 una forma distinta de la esfera. En  ocasiones, esta forma se modeliza como un elipsoide, y a esta t\u00e9cnica se la  denomina <strong>imagen con tensores de difusi\u00f3n<\/strong> (DTI).<\/p>\n<p>Se utiliza para poder comprender los deficits funcionales y asociativos y de aprendizaje &#8211;&gt; como en el caso del TDAH o deficit de atencion en el que el cuerpo calloso que conexiona todas las areas cerebrales esta reducido.<\/p>\n<p>O para comprobar los tractos afectados en un tumor y poder operar respetando el mayor numero de tractos indemnes.<\/p>\n<p>Es una buena aplicacion para tele-consultar o realizar telemedicina.<\/p>\n<p>\ufeff<\/p>\n<figure id=\"attachment_5315\" aria-describedby=\"caption-attachment-5315\" style=\"width: 300px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/catai.net\/blog\/\/wp-content\/uploads\/2011\/01\/Master_Thesis_Final_LJvanderKnaap1.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-5315\" title=\"Master_Thesis_Final_LJvanderKnaap[1]\" src=\"https:\/\/catai.net\/blog\/\/wp-content\/uploads\/2011\/01\/Master_Thesis_Final_LJvanderKnaap1-300x248.jpg\" alt=\"\" width=\"300\" height=\"248\" srcset=\"https:\/\/catai.net\/blog\/wp-content\/uploads\/2011\/01\/Master_Thesis_Final_LJvanderKnaap1-300x248.jpg 300w, https:\/\/catai.net\/blog\/wp-content\/uploads\/2011\/01\/Master_Thesis_Final_LJvanderKnaap1.jpg 413w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-5315\" class=\"wp-caption-text\">Cuerpo calloso normal<\/figcaption><\/figure>\n<p><a href=\"http:\/\/images.suite101.com\/136338_net_brain.jpg\"><img loading=\"lazy\" decoding=\"async\" title=\"Imagen tractograf\u00eda , despuesdegoogle.com\" src=\"http:\/\/images.suite101.com\/136339_net_brain.jpg\" alt=\"Imagen tractograf\u00eda , despuesdegoogle.com\" width=\"352\" height=\"208\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Una tractograf\u00eda es un procedimiento que se usa para poner de manifiesto los tractos neurales utilizandot\u00e9cnicas especiales de imagen por resonancia magn\u00e9tica y an\u00e1lisis de im\u00e1genes asistido por ordenador. El resultado se presenta en im\u00e1genes de 2 y 3 dimensiones. Las secuencias que se utilizan en la RM observan la simetr\u00eda de la difusi\u00f3n del [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"give_campaign_id":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[11,38,13,28],"tags":[],"class_list":["post-5309","post","type-post","status-publish","format-standard","hentry","category-diagnostico-no-invasivo","category-contratacion-externa","category-phealth","category-sanidad"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Tractografia (DTI) | Telemedicina<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/catai.net\/blog\/2011\/01\/tractografia-dti\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tractografia (DTI) | Telemedicina\" \/>\n<meta property=\"og:description\" content=\"Una tractograf\u00eda es un procedimiento que se usa para poner de manifiesto los tractos neurales utilizandot\u00e9cnicas especiales de imagen por resonancia magn\u00e9tica y an\u00e1lisis de im\u00e1genes asistido por ordenador. El resultado se presenta en im\u00e1genes de 2 y 3 dimensiones. 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