Question 805
{"accessible":false,"alternatives":[{"id":4075,"text":"produces images of far inferior quality to fluoroscopy"},{"id":4076,"text":"refers to a continuous x-ray exposure technique"},{"id":4072,"text":"results in dose rates which are much less than in fluoroscopy"},{"id":4074,"text":"uses dose rates 10-50 times greater than in fluoroscopy"},{"id":4073,"text":"uses the same dose rate as fluoroscopy"}],"archived":false,"correctAlternativeId":4074,"explanation":"\u003cp\u003eThe use of continuous x-ray exposures in fluoroscopy generally refers to the use of low x-ray tube exposure\u0026nbsp;currents (i.e. 0.5 to 5 mA). The resultant images have a low image quality but are sufficient for applications such as patient positioning or monitoring catheter placement. Its use is also commonly called Screening, a reference to the days when a sheet of glass coated with a fluorescent material was used for such imaging. By contrast, the term fluorography generally refers to the use of relatively intense (e.g. 50 to 1000 mA), pulsed exposures. Pulses are typically of short duration and can be applied at a rate of, for example, 1 to 8 per second.\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":805,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/805","nextQuestionPath":"/articles/effective-dose/questions/754","relatedArticles":[],"alsoUsedIn":[],"stem":"\u003cp\u003eFluorography typically...\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/805"}],"attemptsPercentages":[{"alternativeId":"4074","percentage":39},{"alternativeId":"4073","percentage":10},{"alternativeId":"4072","percentage":14},{"alternativeId":"4075","percentage":7},{"alternativeId":"4076","percentage":29}],"promptToLogin":false,"questionManager":false,"articleId":"effective-dose"}