Question 2781
{"accessible":false,"alternatives":[{"id":13569,"text":"F18-FDG"},{"id":13570,"text":"Tc99m-HDP"},{"id":13571,"text":"Tc99m-MAA"},{"id":13572,"text":"Technegas"},{"id":13573,"text":"Xenon-133"}],"archived":false,"correctAlternativeId":13571,"explanation":"\u003cp\u003eTc99m-MAA is a radiolabelled albumin analog which is used globally for the perfusion phase of the VQ scan. The size of the proteins is such that it lodges in the pulmonary capillary beds to provide a map of the blood flow to the lung at the time of injection. \u003c/p\u003e\u003cp\u003eIn Australia, Technegas is used for the ventilation phase, with Xenon-133 or Tc99m-DTPA used in other parts of the world. F18-FDG is a positron emitter, used globally as the most common PET agent for oncology scans. Tc99m-HDP is a bone scan radiopharmaceutical. \u003c/p\u003e","id":2781,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2781","nextQuestionPath":"/articles/tc-99m-maa/questions/2449","relatedArticles":[{"id":46829,"title":"V/Q scan","link":"/articles/vq-scan-2?lang=us"}],"alsoUsedIn":[{"id":1723,"kind":"Course","title":"2023 Virtual Conference Private Use - page 1723","link":"https://radiopaedia.org/courses/2023-virtual-conference-private-use/pages/1723"},{"id":365,"kind":"LiveSchedule","title":"365","link":"https://radiopaedia.org/admin/live_schedules/365"},{"id":277,"kind":"LiveSchedule","title":"277","link":"https://radiopaedia.org/admin/live_schedules/277"},{"id":1478,"kind":"Course","title":"2023 Virtual Conference Private Use - page 1478","link":"https://radiopaedia.org/courses/2023-virtual-conference-private-use/pages/1478"},{"id":1478,"kind":"Course","title":"Example Lectures - page 1478","link":"https://radiopaedia.org/courses/example-lectures/pages/1478"},{"id":1478,"kind":"Course","title":"Chest Lectures - page 1478","link":"https://radiopaedia.org/courses/chest-lectures/pages/1478"}],"stem":"\u003cp\u003eWhich of the following radiopharmaceuticals is used for the perfusion phase of a nuclear medicine ventilation perfusion scan (VQ scan)?\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/2781"}],"attemptsPercentages":[{"alternativeId":"13571","percentage":65},{"alternativeId":"13570","percentage":16},{"alternativeId":"13569","percentage":2},{"alternativeId":"13572","percentage":11},{"alternativeId":"13573","percentage":5}],"promptToLogin":false,"questionManager":false,"articleId":"tc-99m-maa"}