Question 795
{"accessible":false,"alternatives":[{"id":4021,"text":"algebraic reconstruction"},{"id":4022,"text":"filtered back projection"},{"id":4023,"text":"fourier reconstruction"},{"id":4024,"text":"iterative reconstruction"}],"archived":false,"correctAlternativeId":4022,"explanation":"\u003cp\u003eFiltered back projection\u0026nbsp;is an analytic reconstruction algorithm designed to overcome the limitations of conventional back-projection; it applies a convolution filter to remove blurring. It was, up until recently the primary method in cross-sectional image reconstruction.\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":795,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/795","nextQuestionPath":null,"relatedArticles":[{"id":45756,"title":"Filtered back projection","link":"/articles/filtered-back-projection-1?lang=us"},{"id":46277,"title":"Cone-beam CT","link":"/articles/cone-beam-ct-1?lang=us"},{"id":51925,"title":"Iterative reconstruction (CT)","link":"/articles/iterative-reconstruction-ct?lang=us"}],"alsoUsedIn":[],"stem":"\u003cp\u003eWhat is the most commonly used reconstruction technique in cone beam CT?\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/795"}],"attemptsPercentages":[{"alternativeId":"4022","percentage":66},{"alternativeId":"4021","percentage":4},{"alternativeId":"4023","percentage":7},{"alternativeId":"4024","percentage":23}],"promptToLogin":false,"questionManager":false,"articleId":"image-reconstruction-ct"}