{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,2]],"date-time":"2025-08-02T14:17:58Z","timestamp":1754144278874,"version":"3.41.2"},"reference-count":31,"publisher":"The Endocrine Society","issue":"8","license":[{"start":{"date-parts":[[2024,11,11]],"date-time":"2024-11-11T00:00:00Z","timestamp":1731283200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["81801732"],"award-info":[{"award-number":["81801732"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2025,7,15]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:sec>\n                  <jats:title>Purpose<\/jats:title>\n                  <jats:p>The effect of methimazole withdrawal period (MWP) on the estimation of 24-hour-radioiodine thyroid uptake (131IU24h) from 99mTc-pertechnetate thyroid uptake (99mTcTU) remains unclear for patients with Graves\u2019 disease (GD). This study aims to investigate the feasibility and reliability of 99mTcTU-based 131IU24h estimation with different MWPs.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>We enrolled 116 GD patients scheduled for 131I therapy at our hospital between April 2022 and April 2023. Based on MWP, the patients were categorized as standard (no methimazole or MWP &amp;gt; 1 month), MWP1 (MWP \u2264 1 week), MWP2 (MWP &amp;gt; 1 week to \u22642 weeks), and MWP3 (MWP &amp;gt; 2 weeks to &amp;lt;1 month). Fisher's exact test, one-way ANOVA, or Kruskal\u2013Wallis test were used to compare variables. Fitted curves of 99mTcTU20min vs 131IU24h were plotted for the standard group. Linear relationships and Bland\u2013Altman plots were used to illustrate the relationship and consistency between estimated and measured 131IU24h.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>131IU24h was higher in the MWP1 group compared to MWP2 (70.22 \u00b1 7.95% vs 61.92 \u00b1 9.84%, P = .001), and thyroid mass was greater in the MWP1 group (36.15 \u00b1 22.38\u2005g) vs MWP3 (21.25 \u00b1 11.90\u2005g, P = .005). The relationship between 131IU24h and 99mTcTU20min in the standard group is described by the following algorithm: estimated 131IU24h = 11.3ln (99mTcTU20min) + 39.4 (R2 = 0.62). Based on it, the correlation between estimated and measured 131IU24h was weak in MWP1 and MWP2 (both P &amp;gt; .05) but strong in MWP3 (r = 0.66, P = .002). Additionally, the agreement between estimated and measured 131IU24h was highest in the MWP3 group (95% confidence interval, \u221215.86 to 15.52%) compared to the MWP1and MWP2 groups.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion<\/jats:title>\n                  <jats:p>Estimated 131IU24h based on 99mTcTU is not suitable for GD patients with MWP less than 2 weeks at our institution, necessitating further prospective multicenter studies for validation.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1210\/clinem\/dgae794","type":"journal-article","created":{"date-parts":[[2024,11,11]],"date-time":"2024-11-11T03:03:17Z","timestamp":1731294197000},"page":"2273-2279","source":"Crossref","is-referenced-by-count":0,"title":["Effect of Methimazole Withdrawl Period on the I-131 Uptake Estimation Using Tc-99\u2005m Thyroid Scanning in Graves\u2019 Disease"],"prefix":"10.1210","volume":"110","author":[{"given":"Hui","family":"Wang","sequence":"first","affiliation":[{"name":"Department of Nuclear Medicine, Tianjin Medical University General Hospital , Tianjin 300052 ,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Weijian","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Nuclear Medicine, Tianjin Medical University General Hospital , Tianjin 300052 ,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pengpeng","family":"Chang","sequence":"additional","affiliation":[{"name":"Department of Nuclear Medicine, Tianjin Medical University General Hospital , Tianjin 300052 ,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qiang","family":"Jia","sequence":"additional","affiliation":[{"name":"Department of Nuclear Medicine, Tianjin Medical University General Hospital , Tianjin 300052 ,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jian","family":"Tan","sequence":"additional","affiliation":[{"name":"Department of Nuclear Medicine, Tianjin Medical University General Hospital , Tianjin 300052 ,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6839-8527","authenticated-orcid":false,"given":"Ruiguo","family":"Zhang","sequence":"additional","affiliation":[{"name":"Department of Nuclear Medicine, Tianjin Medical University General Hospital , Tianjin 300052 ,","place":["China"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"80","published-online":{"date-parts":[[2024,11,11]]},"reference":[{"issue":"10","key":"2025071507115518400_dgae794-B1","doi-asserted-by":"crossref","first-page":"1343","DOI":"10.1089\/thy.2016.0229","article-title":"2016 American thyroid association guidelines for diagnosis and management of hyperthyroidism and other causes of thyrotoxicosis","volume":"26","author":"Ross","year":"2016","journal-title":"Thyroid"},{"issue":"4","key":"2025071507115518400_dgae794-B2","doi-asserted-by":"crossref","first-page":"282","DOI":"10.1016\/S2213-8587(23)00005-0","article-title":"Hyperthyroidism: aetiology, pathogenesis, diagnosis, management, complications, and prognosis","volume":"11","author":"Wiersinga W","year":"2023","journal-title":"Lancet Diabetes Endocrinol"},{"issue":"15","key":"2025071507115518400_dgae794-B3","doi-asserted-by":"crossref","first-page":"1472","DOI":"10.1001\/jama.2023.19052","article-title":"Hyperthyroidism: a review","volume":"330","author":"Lee","year":"2023","journal-title":"JAMA"},{"issue":"11","key":"2025071507115518400_dgae794-B4","doi-asserted-by":"crossref","first-page":"3324","DOI":"10.1007\/s00259-023-06274-5","article-title":"The EANM guideline on radioiodine therapy of benign thyroid disease","volume":"50","author":"Campenn\u00ec","year":"2023","journal-title":"Eur J Nucl Med Mol Imaging"},{"issue":"7","key":"2025071507115518400_dgae794-B5","doi-asserted-by":"crossref","first-page":"1126","DOI":"10.1007\/s00259-013-2387-x","article-title":"EANM dosimetry committee series on standard operational procedures for Pre-therapeutic dosimetry II. 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