{"id":52608,"date":"2025-04-25T22:03:28","date_gmt":"2025-04-26T02:03:28","guid":{"rendered":"https:\/\/www.hancockhealth.org\/mayo-health-library\/intraoperative-magnetic-resonance-imaging-imri\/"},"modified":"2026-02-04T12:06:41","modified_gmt":"2026-02-04T17:06:41","slug":"intraoperative-magnetic-resonance-imaging-imri","status":"publish","type":"mayo","link":"https:\/\/www.hancockhealth.org\/ja\/mayo-health-library\/intraoperative-magnetic-resonance-imaging-imri\/","title":{"rendered":"Intraoperative magnetic resonance imaging (iMRI)"},"content":{"rendered":"<div class=\"container mx-auto   wordpress-block wordpress- core-\">\n<p>Intraoperative magnetic resonance imaging (iMRI) is a procedure that creates images of the brain during surgery. Neurosurgeons rely on <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> to guide them in removing brain tumors and treating other conditions such as epilepsy.<\/p>\n<h3>Advantages of iMRI<\/h3>\n<p>Imaging tests are used to plan brain surgery, but real-time images created with <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> during surgery are crucial to:<\/p>\n<ul>\n<li><strong>Locate changes if the brain has shifted.<\/strong> The brain often shifts during surgery, which makes pre-surgical imaging not exactly precise. Imaging with <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> during the operation helps to provide surgeons with the most accurate information.<\/li>\n<li><strong>Distinguish between healthy brain tissue and tumors.<\/strong> It can be difficult to distinguish the edges of a brain tumor and separate healthy tissue from tissue that needs to be removed. Imaging with <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> during surgery helps confirm successful removal of the entire brain tumor.<\/li>\n<li>\n<p><strong>Protect critical structures.<\/strong> A procedure called laser interstitial thermal therapy (LITT) allows surgeons to treat epilepsy by heating tissue and making it inactive. This disrupts seizures through a minimally invasive approach. By using <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> to monitor brain temperature, surgeons are able to keep temperatures low enough to avoid injury during the procedure. In <abbr title=\"magnetic resonance\">MR<\/abbr>-guided ultrasound, surgeons can focus ultrasound energy on areas of the brain causing epilepsy without performing surgery.<\/p>\n<p>Intraoperative <abbr title=\"magnetic resonance imaging\">MRI<\/abbr> allows surgeons to achieve a more complete removal of some brain tumors. For this reason, <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> has become standard for many operations to remove certain brain tumors.<\/p>\n<\/li>\n<\/ul>\n<h3>How iMRI works<\/h3>\n<p><abbr title=\"magnetic resonance imaging\">MRI<\/abbr> uses a magnetic field and radio waves to create detailed images of the organs and tissues in your body. <abbr title=\"magnetic resonance imaging\">MRI<\/abbr> is especially helpful for imaging the brain.<\/p>\n<p>To use <abbr title=\"magnetic resonance imaging\">MRI<\/abbr> technology during surgery, surgeons use special imaging systems and operating rooms, including:<\/p>\n<ul>\n<li><strong>Portable <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> devices,<\/strong> which are moved into the operating room to create images.<\/li>\n<li><strong>Nearby <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> devices,<\/strong> which are kept in a room near the operating room. This way, healthcare professionals can easily move you to the specially designed room for imaging during your surgery.<\/li>\n<\/ul>\n<p>At certain points in your operation, the surgeon may request imaging with <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr>. When and how often the surgeon creates images during surgery depends on your procedure and your condition.<\/p>\n<h3>Uses for iMRI<\/h3>\n<p>Intraoperative <abbr title=\"magnetic resonance imaging\">MRI<\/abbr> is used to assist in surgery to treat:<\/p>\n<ul>\n<li>Brain tumor.<\/li>\n<li>Dystonia.<\/li>\n<li>Epilepsy.<\/li>\n<li>Essential tremor.<\/li>\n<li>Glioma.<\/li>\n<li>Neuropsychiatric disorders.<\/li>\n<li>Parkinson&#8217;s disease.<\/li>\n<li>Pediatric brain tumors.<\/li>\n<li>Pituitary tumors.<\/li>\n<\/ul>\n<p>Surgeons use <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> to assist in procedures that treat a variety of brain tumors. Surgery is often the first step to treat a tumor that can be removed without causing neurological damage. Some tumors have a clearly defined shape and can be removed easily.<\/p>\n<p>In addition, surgeons use <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> to place deep brain stimulators to treat epilepsy, essential tremor, dystonia and Parkinson&#8217;s disease. <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> also is used to assist in surgery for some brain conditions. They include a bulge in a blood vessel, known as an aneurysm, and tangled blood vessels, known as arteriovenous malformation. The technology also may be used in surgery to treat mental health disorders.<\/p>\n<p>During these procedures, <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> allows surgeons to monitor brain activity. It helps surgeons check for bleeding, clots and other complications. Intraoperative <abbr title=\"magnetic resonance imaging\">MRI<\/abbr> can help prevent damage to surrounding tissue and protect brain function. It also can help address complications earlier. The technology may reduce the need for additional operations. For cancer surgery, <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> helps surgeons ensure that the entire tumor has been removed.<\/p>\n<p>Surgeons use <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> to create real-time brain images. At certain points during an operation, the surgeon may want to see certain images of the brain. <abbr title=\"magnetic resonance imaging\">MRI<\/abbr> uses a magnetic field and radio waves to create detailed brain images.<\/p>\n<p>To use <abbr title=\"magnetic resonance imaging\">MRI<\/abbr> technology during surgery, healthcare professionals may bring a portable <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> machine into the operating room to create images. Or they may keep the <abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> machine in a room nearby so surgeons can easily move you there for imaging during the procedure.<\/p>\n<p><abbr title=\"Intraoperative magnetic resonance imaging\">iMRI<\/abbr> cannot be used in patients with most pacemakers, cochlear implants, and metal joints or certain implants.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Find out how neurosurgeons use intraoperative magnetic resonance imaging (iMRI) during brain surgery.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","tags":[1686,1687,1682],"class_list":["post-52608","mayo","type-mayo","status-publish","hentry","tag-anatomical-structure","tag-medical-procedure","tag-person-group-concept","content_type-tests-procedures"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Intraoperative magnetic resonance imaging (iMRI) - 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