Question 786
{"accessible":false,"alternatives":[{"id":3983,"text":"an automatic exposure control (AEC) is not required"},{"id":3984,"text":"good quality diagnostic images can be acquired with radiation exposures which are similar to those required for film/screen imaging"},{"id":3985,"text":"images with the same CR exposure index are all obtained with the same radiation dose to the patient"},{"id":3986,"text":"unlike photographic film, CR plates are impervious to “fogging” by background radiation during storage"}],"archived":false,"correctAlternativeId":3984,"explanation":"\u003cp\u003eAutomatic exposure control is independent of the image receptor; as with film, CR exposure indexes will vary from patient to patient. Patients with a larger body habitus will require an increased radiation dose to obtain the same optimal index.\u003c/p\u003e\u003cp\u003eCR plates are still susceptible to fogging artefact due to background radiation.\u0026nbsp;\u003c/p\u003e\u003cp\u003eHigh-quality images can be acquired using similar radiation exposures to film; in fact, in most cases, lower radiation doses are required.\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":786,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2752","nextQuestionPath":null,"relatedArticles":[],"alsoUsedIn":[],"stem":"\u003cp\u003eWith regard to computed radiographic (CR) imaging, which of the following statements is\u0026nbsp;\u003cstrong\u003eTRUE\u003c/strong\u003e?\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/786"}],"attemptsPercentages":[{"alternativeId":"3985","percentage":15},{"alternativeId":"3986","percentage":26},{"alternativeId":"3983","percentage":13},{"alternativeId":"3984","percentage":45}],"promptToLogin":false,"questionManager":false,"articleId":"computed-radiography"}