Question 789
{"accessible":false,"alternatives":[{"id":3996,"text":"decreased collimation"},{"id":3997,"text":"increased field of view, same matrix size"},{"id":3998,"text":"increased matrix size, same field of view"},{"id":3999,"text":"selection of a smoothing algorithm"}],"archived":false,"correctAlternativeId":3998,"explanation":"\u003cp\u003eThe image matrix comprised of columns (M) and rows (N) that define the elements or pixels within an image. The size of an image is:\u0026nbsp;\u003c/p\u003e\u003cul\u003e\u003cli\u003e\u003cstrong\u003eMatrix = M x N x k bits\u0026nbsp;\u003c/strong\u003e\u003c/li\u003e\u003c/ul\u003e\u003cp\u003eThe field of view is the size of the displayed image. However, if you maintain the same FOV and increase the matrix the pixels will be smaller and hence spatial resolution is improved.\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":789,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1542","nextQuestionPath":null,"relatedArticles":[],"alsoUsedIn":[],"stem":"\u003cp\u003eA radiologist wants to improve the spatial resolution of the anatomy being examined. The change most likely to lead to this is...\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/789"}],"attemptsPercentages":[{"alternativeId":"3997","percentage":10},{"alternativeId":"3998","percentage":72},{"alternativeId":"3999","percentage":5},{"alternativeId":"3996","percentage":13}],"promptToLogin":false,"questionManager":false,"articleId":"digital-image"}