Question 754
{"accessible":false,"alternatives":[{"id":3824,"text":"0.5 mSv"},{"id":3825,"text":"1.5 mSv"},{"id":3826,"text":"2.5 mSv"},{"id":3827,"text":"15 mSv"},{"id":3828,"text":"25 mSv"}],"archived":false,"correctAlternativeId":3826,"explanation":"\u003cp\u003eThe exact value varies depending on geographic location, and variations by a factor of over 100 occur in background exposure in different parts of the world have been reported. The most oft-quoted figure states a background radiation dose\u0026nbsp;of approximately 2.5 mSv\u0026nbsp;in Australia.\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":754,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1505","nextQuestionPath":"/articles/dose-limits/questions/753","relatedArticles":[{"id":5101,"title":"Effective dose","link":"/articles/effective-dose?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eWhat is the approximate\u0026nbsp;annual effective dose to an individual due to natural background radiation?\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/754"}],"attemptsPercentages":[{"alternativeId":"3825","percentage":17},{"alternativeId":"3824","percentage":33},{"alternativeId":"3828","percentage":3},{"alternativeId":"3827","percentage":3},{"alternativeId":"3826","percentage":43}],"promptToLogin":false,"questionManager":false,"articleId":"dose-limits"}