Question 698
{"accessible":false,"alternatives":[{"id":3515,"text":"beam filtration"},{"id":3519,"text":"focal spot size"},{"id":3516,"text":"grid ratio"},{"id":3517,"text":"irradiated field size"},{"id":3518,"text":"total scan length"}],"archived":false,"correctAlternativeId":3519,"explanation":"\u003cp\u003eThe focal spot influences imaging geometry, but is not directly related to skin dose.\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":698,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2751","nextQuestionPath":"/articles/focal-spot/questions/634","relatedArticles":[{"id":30312,"title":"Grids","link":"/articles/grids?lang=us"},{"id":29737,"title":"Filters","link":"/articles/filters?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eWhich one of the following has minimal effect on the patient's skin dose?\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/698"}],"attemptsPercentages":[{"alternativeId":"3515","percentage":17},{"alternativeId":"3516","percentage":20},{"alternativeId":"3517","percentage":9},{"alternativeId":"3518","percentage":8},{"alternativeId":"3519","percentage":46}],"promptToLogin":false,"questionManager":false,"articleId":"focal-spot"}