{"id":89,"date":"2007-10-18T01:32:35","date_gmt":"2007-10-18T01:32:35","guid":{"rendered":"http:\/\/brainybehavior.com\/blog\/?p=89"},"modified":"2007-10-18T01:33:06","modified_gmt":"2007-10-18T01:33:06","slug":"mri-quenching","status":"publish","type":"post","link":"https:\/\/www.brainybehavior.com\/blog\/2007\/10\/mri-quenching\/","title":{"rendered":"MRI Quenching"},"content":{"rendered":"<div class=\"ydjfy69ff642f891a6\" ><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<!-- Mobile in post -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:320px;height:100px\"\r\n     data-ad-client=\"ca-pub-0039142346952764\"\r\n     data-ad-slot=\"1620587573\"><\/ins>\r\n<script>\r\n(adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div><style type=\"text\/css\">\r\n.ydjfy69ff642f891a6 {\r\nmargin: 5px; padding: 0px;\r\n}\r\n@media screen and (min-width: 1201px) {\r\n.ydjfy69ff642f891a6 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.ydjfy69ff642f891a6 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.ydjfy69ff642f891a6 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.ydjfy69ff642f891a6 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.ydjfy69ff642f891a6 {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n<p>I learned something new this week. Modern MRI scanners produce high-strength magnetic fields (typically 1.5T up to about 20T &#8211; scanners for use with humans max out at about 7T right now {those are very rare though, 1.5T and 3T are more common). To produce these fields the scanners need to have strong electric currents. In order to handle large currents, scanners use superconductors cooled with liquid helium. In cases of serious malfunction or emergency the MRI scanner can be <em>quenched<\/em>, which releases all of the liquid helium. The helium turns into a gaseous state rapidly and expands to fill the room. The quench will make a loud sound like a jet engine or a pop. If the room is small enough, all of the air can be pushed out as the helium expands and increases the pressure. Most MRI rooms have fail-safe systems that release the helium outside, which prevents the occupants from suffocating.<img decoding=\"async\" src=\"http:\/\/brainybehavior.com\/blog\/wp-content\/uploads\/2007\/10\/mriquench2.jpg\" title=\"MRI Quench\" alt=\"MRI Quench\" align=\"absmiddle\" border=\"0\" \/><\/p><div class=\"spict69ff642f891f1\" ><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\n<!-- Mobile in post -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:320px;height:100px\"\n     data-ad-client=\"ca-pub-0039142346952764\"\n     data-ad-slot=\"1620587573\"><\/ins>\n<script>\n(adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><style type=\"text\/css\">\r\n.spict69ff642f891f1 {\r\nmargin: 5px; padding: 0px;\r\n}\r\n@media screen and (min-width: 1201px) {\r\n.spict69ff642f891f1 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.spict69ff642f891f1 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.spict69ff642f891f1 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.spict69ff642f891f1 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.spict69ff642f891f1 {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n\n<p>Image from <a href=\"http:\/\/www.tommcmahon.net\/2005\/08\/mri_scanner_sup.html\">here<\/a>.<\/p>\n<div class=\"htbfr69ff642f8921a\" ><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<!-- Mobile in post -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:inline-block;width:320px;height:100px\"\r\n     data-ad-client=\"ca-pub-0039142346952764\"\r\n     data-ad-slot=\"1620587573\"><\/ins>\r\n<script>\r\n(adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script><\/div><style type=\"text\/css\">\r\n.htbfr69ff642f8921a {\r\nmargin: 5px; padding: 0px;\r\n}\r\n@media screen and (min-width: 1201px) {\r\n.htbfr69ff642f8921a {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.htbfr69ff642f8921a {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.htbfr69ff642f8921a {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.htbfr69ff642f8921a {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.htbfr69ff642f8921a {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n","protected":false},"excerpt":{"rendered":"<p>I learned something new this week. Modern MRI scanners produce high-strength magnetic fields (typically 1.5T up to about 20T &#8211; scanners for use with humans max out at about 7T right now {those are very rare though, 1.5T and 3T are more common). To produce these fields the scanners need to have strong electric currents. &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.brainybehavior.com\/blog\/2007\/10\/mri-quenching\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;MRI Quenching&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,6],"tags":[],"class_list":["post-89","post","type-post","status-publish","format-standard","hentry","category-mri","category-neuroimaging"],"_links":{"self":[{"href":"https:\/\/www.brainybehavior.com\/blog\/wp-json\/wp\/v2\/posts\/89","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.brainybehavior.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.brainybehavior.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.brainybehavior.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.brainybehavior.com\/blog\/wp-json\/wp\/v2\/comments?post=89"}],"version-history":[{"count":0,"href":"https:\/\/www.brainybehavior.com\/blog\/wp-json\/wp\/v2\/posts\/89\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.brainybehavior.com\/blog\/wp-json\/wp\/v2\/media?parent=89"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.brainybehavior.com\/blog\/wp-json\/wp\/v2\/categories?post=89"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.brainybehavior.com\/blog\/wp-json\/wp\/v2\/tags?post=89"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}