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Limitations of T2 Imaging in Long-Term Follow Up<\/p>\n
Despite its importance in follow up, T2-weighted MRI, the standard for visualizing MRgFUS thalamotomy lesions, has limitations in long-term assessment, becoming particularly critical to evaluate when there is a recurrence of symptoms.<\/p>\n
Once the edema from the procedure resolves at around six months after treatment, the lesion tends to be difficult to see on the T2-weighted image. This makes it difficult, if not impossible, to correlate symptoms with the lesion location.<\/p>\n
To address this loss of visibility, T1\/T2-weighted ratio enhances contrast in the image by dividing the T1-weighted scan by the T2-weighted one.<\/p>\n
In the study, Dr. Sanchez-Catasus and colleagues compared this method with T2-weighted imaging in 54 patients, including 27 with ET and 27 with TDPD.<\/p>\n
Lesion normalized contrast was higher for T1\/T2-weighted ratio images than for T2-weighted images. \u201cWe found similar results in patients with tremor recurrence,\u201d Dr. Sanchez-Catasus said. \u201cIn addition, the T1\/T2-weighted ratio imaging had higher between-evaluator agreement than T2-weighted imaging.\u201d<\/p>\n
These advantages may be especially valuable in patients with recurrent tremors, where lesion visibility is critical for reassessment.<\/p>\n
Looking ahead, Dr. Sanchez-Catasus and colleagues plan to investigate whether the T1\/T2-weighted ratio allows visualization of chronic lesions that are not visible in the T2 sequence. It will provide insights into tremor recurrence.<\/p>\n
\u201cSome studies show that at one year, approximately half of patients show no discernible signal abnormalities on the T2 sequence, which is the current standard for follow-up after MRgFUS,\u201d Dr. Sanchez-Catasus said. \u201cIt is of great interest to reveal the lesion trace that standard T2 scans may miss, to obtain a quantitatively superior view of the ablation site.\u201d<\/p>\n
In patients with recurrent tremors, invisible T2 findings create uncertainty about whether recurrence reflects inadequate initial treatment, Dr. Sanchez-Catasus said. If the T1\/T2-weighted ratio makes the invisible lesion \u201creappear,\u201d it could finally confirm whether the targeting was correct.<\/p>\n
\u201cIt would allow us to determine whether the disappeared lesion was simply too small or biologically soft, lacking the permanent architectural change necessary for long-term relief,\u201d he said.<\/p>\n","protected":false},"excerpt":{"rendered":"Limitations of T2 Imaging in Long-Term Follow Up Despite its importance in follow up, T2-weighted MRI, the standard…\n","protected":false},"author":2,"featured_media":574316,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[103,61,60],"class_list":["post-574315","post","type-post","status-publish","format-standard","has-post-thumbnail","category-health","tag-health","tag-ie","tag-ireland"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/574315","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/comments?post=574315"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/574315\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media\/574316"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media?parent=574315"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/categories?post=574315"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/tags?post=574315"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}