Question 2408
{"accessible":false,"alternatives":[{"id":11855,"text":"gallium 67"},{"id":11853,"text":"gallium 68"},{"id":11854,"text":"iodine 131"},{"id":11852,"text":"lutetium 177"},{"id":11851,"text":"technetium 99m"}],"archived":false,"correctAlternativeId":11853,"explanation":"\u003cp\u003eGallium 68 (Ga68) is a positron emitter with a half-life of 68 minutes. It is commonly used for PET scans, and is the second most common isotope used for PET scans in clinical practice after F18-FDG. It can be combined with small molecules such as \u003ca title=\"PSMA\" class=\"internal\" href=\"/articles/prostate-specific-membrane-antigen\"\u003ePSMA \u003c/a\u003eor \u003ca title=\"Gallium-68 DOTATATE\" class=\"internal\" href=\"/articles/gallium-68-dotatate\"\u003eDOTATATE \u003c/a\u003efor targeted imaging.\u0026nbsp;\u003c/p\u003e","id":2408,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/3094","nextQuestionPath":"/articles/gallium-68-dotatate/questions/2031","relatedArticles":[{"id":54101,"title":"Prostate-specific membrane antigen","link":"/articles/prostate-specific-membrane-antigen?lang=us"}],"alsoUsedIn":[{"id":1348,"kind":"Course","title":"2022 Virtual Conference Private Use - page 1348","link":"https://radiopaedia.org/courses/2022-virtual-conference-private-use/pages/1348"},{"id":1200,"kind":"Course","title":"2022 Virtual Conference Private Use - page 1200","link":"https://radiopaedia.org/courses/2022-virtual-conference-private-use/pages/1200"},{"id":248,"kind":"LiveSchedule","title":"248","link":"https://radiopaedia.org/admin/live_schedules/248"},{"id":160,"kind":"LiveSchedule","title":"160","link":"https://radiopaedia.org/admin/live_schedules/160"},{"id":1281,"kind":"Course","title":"2022 Virtual Conference Private Use - page 1281","link":"https://radiopaedia.org/courses/2022-virtual-conference-private-use/pages/1281"},{"id":1281,"kind":"Course","title":"Nuclear Medicine Lectures - page 1281","link":"https://radiopaedia.org/courses/nuclear-medicine-lectures/pages/1281"}],"stem":"\u003cp\u003eWhich of the following radioisotopes is a positron emitter?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/2408"}],"attemptsPercentages":[{"alternativeId":"11852","percentage":7},{"alternativeId":"11854","percentage":6},{"alternativeId":"11853","percentage":66},{"alternativeId":"11851","percentage":9},{"alternativeId":"11855","percentage":13}],"promptToLogin":false,"questionManager":false,"articleId":"gallium-68-dotatate"}