{"id":2311,"date":"2010-08-30T14:34:59","date_gmt":"2010-08-30T13:34:59","guid":{"rendered":"http:\/\/www.rontgen.com\/wp-doctor\/?p=2311"},"modified":"2010-09-29T20:20:05","modified_gmt":"2010-09-29T19:20:05","slug":"oljud-med-mr","status":"publish","type":"post","link":"https:\/\/www.rontgen.com\/wp-doctor\/oljud-med-mr","title":{"rendered":"Oljud med MR"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft\" style=\"border: 0px;\" title=\"Fr\u00e5ga\" src=\"https:\/\/www.rontgen.com\/wp-doctor\/wp-content\/uploads\/2008\/12\/icon_mini_faq.gif\" alt=\"Fr\u00e5ga\" width=\"12\" height=\"13\" \/>\u00a0Gjorde MR r\u00f6tgen l\u00e4ndrygg ig\u00e5r, min fr\u00e5ga \u00e4r rent teknisk, vad \u00e4r det som slammrar s\u00e5 h\u00f6gt? Ljudet \u00e4ndrade karakt\u00e4r mest hela tiden h\u00f6rde inte ens musiken i lurarna.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft\" style=\"border: 0px;\" title=\"Svar\" src=\"https:\/\/www.rontgen.com\/wp-doctor\/wp-content\/uploads\/2008\/12\/icon_mini_register.gif\" alt=\"Svar\" width=\"12\" height=\"13\" \/>\u00a0Magnetisk resonans (MR) \u00e4r en teknik som utnyttjar ett starkt likformigt magnetf\u00e4lt. Detta magnetf\u00e4lt skapas av en elektrisk str\u00f6m i en spole. F\u00f6r att kunna skapa bilder m\u00e5ste man dessutom under unders\u00f6kningen ha varierande magnetf\u00e4lt som sl\u00e5s av och p\u00e5. Dessa skapas ocks\u00e5 av elektriska str\u00f6mmar i spolar. Magnetiska krafter \u00e4r v\u00e4ldigt starka, och n\u00e4r man sl\u00e5r p\u00e5 och av de varierande magnetf\u00e4lten s\u00e5 kommer spolarna som skapar dessa att hoppa till eftersom det likformigt starka magnetf\u00e4ltet, med magnetiska krafter, vrider spolarna lite grann. Det \u00e4r n\u00e4r de elektriska spolarna hoppar till som det uppst\u00e5r ett knackande ljud. F\u00f6r att kunna f\u00e5 en bild av kroppens inre beh\u00f6vs olika komponenter av MR-signaler. Hur h\u00f6gt det knackande ljudet \u00e4r och hur ofta knackningarna kommer beror p\u00e5 vilken del av MR-signalen som samlas in.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft\" style=\"border: 0px;\" title=\"Svarat av\" src=\"https:\/\/www.rontgen.com\/wp-doctor\/wp-content\/uploads\/2008\/12\/icon_mini_profile.gif\" alt=\"Svarat av\" width=\"12\" height=\"13\" \/>\u00a0M. O. sjukhusfysiker<br \/>\nR\u00f6ntgenavdelningen Helsingborgs lasarett<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00a0Gjorde MR r\u00f6tgen l\u00e4ndrygg ig\u00e5r, min fr\u00e5ga \u00e4r rent teknisk, vad \u00e4r det [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[141,145],"class_list":["post-2311","post","type-post","status-publish","format-standard","hentry","category-mr","tag-mr","tag-teknik"],"_links":{"self":[{"href":"https:\/\/www.rontgen.com\/wp-doctor\/wp-json\/wp\/v2\/posts\/2311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rontgen.com\/wp-doctor\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rontgen.com\/wp-doctor\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rontgen.com\/wp-doctor\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rontgen.com\/wp-doctor\/wp-json\/wp\/v2\/comments?post=2311"}],"version-history":[{"count":0,"href":"https:\/\/www.rontgen.com\/wp-doctor\/wp-json\/wp\/v2\/posts\/2311\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.rontgen.com\/wp-doctor\/wp-json\/wp\/v2\/media?parent=2311"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rontgen.com\/wp-doctor\/wp-json\/wp\/v2\/categories?post=2311"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rontgen.com\/wp-doctor\/wp-json\/wp\/v2\/tags?post=2311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}