Question 2753
{"accessible":false,"alternatives":[{"id":13438,"text":"amorphous selenium semiconductor layer"},{"id":13439,"text":"cesium Iodide scintillator layer"},{"id":13440,"text":"fiber-optic coupling layer"},{"id":13441,"text":"gadolinium oxysulfide scintillator layer"}],"archived":false,"correctAlternativeId":13438,"explanation":"\u003cp\u003eAmorphous selenium semiconductor layer provides excellent spatial resolution. A charge differential across this layer means the electron holes created by incident x-ray photons correlate almost perfectly with the incident x-ray location with very little lateral spread.\u003c/p\u003e\u003cp\u003eCesium Iodide provides better lateral resolution than gadolinium oxysulfide scintillator layers.\u003c/p\u003e\u003cp\u003eThe fiber-optic coupling layer results in loss of spatial resolution due to a phenomenon known as quantum sink.\u003c/p\u003e","id":2753,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2753","nextQuestionPath":"/articles/direct-digital-radiography/questions/2752","relatedArticles":[{"id":69553,"title":"Charge-coupled device detector","link":"/articles/charge-coupled-device-detector?lang=us"}],"alsoUsedIn":[{"id":1563,"kind":"RestrictedPage","title":"Page 1563 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/1563"},{"id":2007,"kind":"Course","title":"Imaging Physics: X-ray - page 2007","link":"https://radiopaedia.org/courses/imaging-physics-x-ray/pages/2007"},{"id":2007,"kind":"Course","title":"Imaging Physics: X-ray peer review - page 2007","link":"https://radiopaedia.org/courses/imaging-physics-x-ray-peer-review/pages/2007"}],"stem":"\u003cp\u003eWhich layer provides the best spatial resolution?\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/2753"}],"attemptsPercentages":[{"alternativeId":"13438","percentage":60},{"alternativeId":"13440","percentage":8},{"alternativeId":"13439","percentage":23},{"alternativeId":"13441","percentage":9}],"promptToLogin":false,"questionManager":false,"articleId":"direct-digital-radiography"}