Question 796
{"accessible":false,"alternatives":[{"id":4025,"text":"anode"},{"id":4026,"text":"input phosphor"},{"id":4027,"text":"output phosphor"},{"id":4028,"text":"photo-cathode"}],"archived":false,"correctAlternativeId":4026,"explanation":"\u003cp\u003eCaesium iodide activated with sodium is the most commonly used input phosphor, the light produced by the phosphor of entry is converted via a photocathode to electrons, these photoelectrons are then accelerated via a potential difference (photocathode to anode) toward the output.\u0026nbsp;\u003c/p\u003e\u003cp\u003eAdapted from\u0026nbsp;\u003ca href=\"https://en.wikibooks.org/wiki/Basic_Physics_of_Digital_Radiography\"\u003eBasic Physics of Digital Radiography\u003c/a\u003e\u0026nbsp;by\u0026nbsp;Kieran Maher,\u0026nbsp;with author's permission (License:\u0026nbsp;\u003ca href=\"https://creativecommons.org/licenses/by-sa/3.0/\"\u003eCreative Commons\u0026nbsp;BY-SA 3.0\u003c/a\u003e).\u003c/p\u003e","id":796,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/816","nextQuestionPath":"/articles/image-intensifier/questions/785","relatedArticles":[],"alsoUsedIn":[],"stem":"\u003cp\u003eWhere in an x-ray image intensifier are x-rays are converted into light?\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/796"}],"attemptsPercentages":[{"alternativeId":"4025","percentage":10},{"alternativeId":"4027","percentage":21},{"alternativeId":"4028","percentage":17},{"alternativeId":"4026","percentage":52}],"promptToLogin":false,"questionManager":false,"articleId":"image-intensifier"}