{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,20]],"date-time":"2025-10-20T16:49:15Z","timestamp":1760978955740},"reference-count":17,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2003,3,20]],"date-time":"2003-03-20T00:00:00Z","timestamp":1048118400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Head &amp; Neck"],"published-print":{"date-parts":[[2003,8]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background.<\/jats:title><jats:p>The aim of this study is to evaluate the usefulness of thallium\u2010201 (Tl\u2010201) single\u2010photon emission CT (SPECT) to detect recurrent or residual nasopharyngeal carcinomas (NPC) when CT findings are indeterminate.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods.<\/jats:title><jats:p>After radiotherapy, 30 NPC patients with indeterminate CT findings were included. CT, Tl\u2010201, and biopsy were performed at least 4 months after radiotherapy and within 1 week of each other. The final results were based on histopathologic findings and clinical follow\u2010up after at least 6 months.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results.<\/jats:title><jats:p>The rates for sensitivity, specificity, and accuracy of Tl\u2010201 SPECT in detecting recurrent or residual NPC when there were indeterminate CT findings, were 86.7%, 93.3%, and 90.0%, respectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions.<\/jats:title><jats:p>These results suggest that Tl\u2010201 SPECT is effective in detecting recurrent or residual NPC when CT findings are indeterminate. \u00a9 2003 Wiley Periodicals, Inc. 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