{"id":20121,"date":"2018-03-09T09:09:21","date_gmt":"2018-03-09T09:09:21","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/shape-constraints-on-snakes-for-multiscale-segmentaion-of-medical-images\/"},"modified":"2018-03-09T09:09:21","modified_gmt":"2018-03-09T09:09:21","slug":"shape-constraints-on-snakes-for-multiscale-segmentaion-of-medical-images","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/politecnica-de-valencia\/shape-constraints-on-snakes-for-multiscale-segmentaion-of-medical-images\/","title":{"rendered":"Shape constraints on snakes for multiscale segmentaion of medical images"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Oliver Knoll Christian <\/strong><\/h2>\n<p>Para aprovechar las ventajas de la radioterpaia conformada para el tratamiento de la pr\u00f3stata, es necesario obtener un contorno preciso de la pr\u00f3stata cancerosa en im\u00e1genes de tomograf\u00eda axial computerizada (tac) para separarla de los tejidos sanos de alrededor.  como marcar manualmente el contorno es un proceso extemamente laborioso y subjetivo, se presenta en este trabajo un nuevo m\u00e9todo para la detecci\u00f3n autom\u00e1tica de contornos, que se aplica en ese trabajo sobre todo a la segmentaci\u00f3n de la pr\u00f3stata en im\u00e1genes de tac y ultrasonidos y a otras tareas de segmentaci\u00f3n en im\u00e1genes m\u00e9dicas.  esta nueva t\u00e9cnica implica restricciones en la deformaci\u00f3n el\u00e1stica del contorno deformable activo (snake), de manera que la curva evolucione hasta una forma t\u00edpica del objeto entrenado. Esto se realiza mediante la parametrizaci\u00f3n del contorno utilizando la transformada wavelet (wt) diadica.  el m\u00e9todo de segmentaci\u00f3n desarrollado fue aplicado a una muestra de 87 im\u00e1genes de ultrasonidos y 86 im\u00e1genes tac de la pr\u00f3stata, en las que fueron marcados manualmente los contornos de la pr\u00f3stata por dos radi\u00f3logos independientes. la diferenciaci\u00f3n entre pr\u00f3stata y tejido adyacente es muy dif\u00edcil incluso para un especialista porque las im\u00e1genes tienen muy poco contraste y mucho ruido. De todos modos, la evaluaci\u00f3n de los resultados autom\u00e1ticos mediante comparaci\u00f3n directa con los resultados manuales de los dos radi\u00f3logos prueba que el m\u00e9todo presentado realiza una segmentaci\u00f3n autom\u00e1tica estable y precisa de objetos bidimensionales en im\u00e1genes m\u00e9dicas.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Shape constraints on snakes for multiscale segmentaion of medical images<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Shape constraints on snakes for multiscale segmentaion of medical images <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Oliver Knoll Christian <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Polit\u00e9cnica de Valencia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 22\/11\/2002<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Mar\u00eda no Alca\u00f1iz Raya<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Francisco Del pozo guerrero <\/li>\n<li> Mossi Garc\u00eda Jos\u00e9 Manuel (vocal)<\/li>\n<li>Juan Ruiz alzola (vocal)<\/li>\n<li>Carlos Alberola lopez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Oliver Knoll Christian Para aprovechar las ventajas de la radioterpaia conformada para el tratamiento de la pr\u00f3stata, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[16820],"tags":[51596,16537,46833,47315,42502,61379],"class_list":["post-20121","post","type-post","status-publish","format-standard","hentry","category-politecnica-de-valencia","tag-carlos-alberola-lopez","tag-francisco-del-pozo-guerrero","tag-juan-ruiz-alzola","tag-maria-no-alcaniz-raya","tag-mossi-garcia-jose-manuel","tag-oliver-knoll-christian"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/20121","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=20121"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/20121\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=20121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=20121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=20121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}