Question 816
{"accessible":false,"alternatives":[{"id":4127,"text":"aSe"},{"id":4128,"text":"AgBr"},{"id":4129,"text":"CdWO4"},{"id":4130,"text":"CsI:Na"},{"id":4131,"text":"Gd2O2S"},{"id":4132,"text":"LaOBr"}],"archived":false,"correctAlternativeId":4130,"explanation":"\u003cp\u003eCaesium iodide activated with sodium (CsI:Na) is the most commonly used\u0026nbsp;entrance phosphor. The light produced by the phosphor of entry is converted via a photocathode to elections. These photoelectrons are then accelerated via a potential difference (photocathode to anode) toward the output.\u0026nbsp;\u003c/p\u003e","id":816,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/816","nextQuestionPath":"/articles/image-intensifier/questions/808","relatedArticles":[{"id":31747,"title":"Entrance phosphor","link":"/articles/entrance-phosphor?lang=gb"}],"alsoUsedIn":[],"stem":"\u003cp\u003eWhat is the most commonly used entrance (input) phosphor material in a modern x-ray image intensifier?\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/816"}],"attemptsPercentages":[{"alternativeId":"4128","percentage":5},{"alternativeId":"4130","percentage":79},{"alternativeId":"4127","percentage":5},{"alternativeId":"4129","percentage":5},{"alternativeId":"4131","percentage":5},{"alternativeId":"4132","percentage":1}],"promptToLogin":false,"questionManager":false,"articleId":"image-intensifier"}