pic de Bragg<\/a>. Ce pic vient du faible ralentissement des protons au d\u00e9but de leur parcours dans la mati\u00e8re, et de leur arr\u00eat brutal une fois leur \u00e9nergie d\u00e9passe un certain seuil.<\/p>\nLa profondeur du pic d\u00e9pend par cons\u00e9quent de l’\u00e9nergie incidente<\/strong> du proton.<\/p>\nL’int\u00e9r\u00eat des acc\u00e9l\u00e9rateurs m\u00e9dicaux \u00e9tant d’offrir la possibilit\u00e9 de traitements aux \u00e9lectrons ou aux photons<\/strong>, il s’agit, au niveau de la t\u00eate radiog\u00e8ne, de transformer le faisceau d’\u00e9lectrons produit en un faisceau adapt\u00e9 au traitement prescrit tant du point de vue de sa qualit\u00e9 que de ses dimensions :<\/p>\n\n- Le mode \u00e9lectrons d\u00e9signe le fait d’utiliser les \u00e9lectrons ayant l’\u00e9nergie et la direction souhait\u00e9e pour le traitement.Mais, apr\u00e8s le passage de la fen\u00eatre de sortie, le faisceau d’\u00e9lectron est quasiment filiforme et ne convient pas pour le traitement d’un volume, c’est pourquoi il est n\u00e9cessaire \u00ab d’\u00e9largir \u00bb le faisceau.<\/li>\n
- Le mode photons d\u00e9signe le fait de produire des rayons X.Il est dans ce cas n\u00e9cessaire d’interposer une cible sur le trajet des \u00e9lectrons produits.<\/li>\n<\/ul>\n
La t\u00eate radiog\u00e8ne comporte donc les \u00e9l\u00e9ments n\u00e9cessaires \u00e0 la production du faisceau th\u00e9rapeutique ainsi que des dispositifs indispensables pour garantir la qualit\u00e9 du faisceau. [13]<\/p>\n","protected":false},"excerpt":{"rendered":"
Scanner simulateur, Syst\u00e8me de planification du traitement et production des rayonnements II. Appareillages II.1 Scanner simulateur Le scanner est un appareil d’imagerie m\u00e9dicale, son principe de fonctionnement est bas\u00e9 sur la rotation de la source de rayons X et l’ensemble de capteurs de fa\u00e7on synchrone autour du patient. Accompagn\u00e9 d’un […]<\/p>\n","protected":false},"author":1,"featured_media":64290,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"default","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":"default","adv-header-id-meta":"","stick-header-meta":"default","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":[28],"tags":[224],"acf":[],"uagb_featured_image_src":{"full":["https:\/\/wikimemoires.net\/wp-content\/uploads\/2019\/12\/image18-2.jpg",913,552,false],"thumbnail":["https:\/\/wikimemoires.net\/wp-content\/uploads\/2019\/12\/image18-2-150x150.jpg",150,150,true],"medium":["https:\/\/wikimemoires.net\/wp-content\/uploads\/2019\/12\/image18-2-300x181.jpg",300,181,true],"medium_large":["https:\/\/wikimemoires.net\/wp-content\/uploads\/2019\/12\/image18-2-768x464.jpg",768,464,true],"large":["https:\/\/wikimemoires.net\/wp-content\/uploads\/2019\/12\/image18-2.jpg",913,552,false],"1536x1536":["https:\/\/wikimemoires.net\/wp-content\/uploads\/2019\/12\/image18-2.jpg",913,552,false],"2048x2048":["https:\/\/wikimemoires.net\/wp-content\/uploads\/2019\/12\/image18-2.jpg",913,552,false]},"uagb_author_info":{"display_name":"WikiMemoires","author_link":"https:\/\/wikimemoires.net\/author\/wikieradmin\/"},"uagb_comment_info":0,"uagb_excerpt":"Scanner simulateur, Syst\u00e8me de planification du traitement et production des rayonnements II. Appareillages II.1 Scanner simulateur Le scanner est un appareil d’imagerie m\u00e9dicale, son principe de fonctionnement est bas\u00e9 sur la rotation de la source de rayons X et l’ensemble de capteurs de fa\u00e7on synchrone autour du patient. Accompagn\u00e9 d’un […]","_links":{"self":[{"href":"https:\/\/wikimemoires.net\/wp-json\/wp\/v2\/posts\/64261"}],"collection":[{"href":"https:\/\/wikimemoires.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wikimemoires.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wikimemoires.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wikimemoires.net\/wp-json\/wp\/v2\/comments?post=64261"}],"version-history":[{"count":0,"href":"https:\/\/wikimemoires.net\/wp-json\/wp\/v2\/posts\/64261\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wikimemoires.net\/wp-json\/wp\/v2\/media\/64290"}],"wp:attachment":[{"href":"https:\/\/wikimemoires.net\/wp-json\/wp\/v2\/media?parent=64261"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wikimemoires.net\/wp-json\/wp\/v2\/categories?post=64261"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wikimemoires.net\/wp-json\/wp\/v2\/tags?post=64261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}