Question 839
{"accessible":false,"alternatives":[{"id":4244,"text":"aliasing artefact"},{"id":4245,"text":"cupping artefact "},{"id":4246,"text":"metal artefact "},{"id":4247,"text":"out of field artefact "},{"id":4248,"text":"windmill artefact "}],"archived":false,"correctAlternativeId":4244,"explanation":"\u003cp\u003e\u003cstrong\u003eAliasing artefact\u003c/strong\u003e, otherwise known as\u0026nbsp;\u003cstrong\u003eundersampling\u003c/strong\u003e,\u003cstrong\u003e\u0026nbsp;\u003c/strong\u003ein CT, refers to an error in the accuracy proponent of analog to digital converter (ADC) during image digitization.\u0026nbsp;\u003c/p\u003e","id":839,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/839","nextQuestionPath":null,"relatedArticles":[],"alsoUsedIn":[],"stem":"\u003cp\u003eIn computed tomography, an undersampling artefact is also known as...\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/839"}],"attemptsPercentages":[{"alternativeId":"4248","percentage":4},{"alternativeId":"4246","percentage":2},{"alternativeId":"4247","percentage":8},{"alternativeId":"4245","percentage":7},{"alternativeId":"4244","percentage":79}],"promptToLogin":false,"questionManager":false,"articleId":"aliasing-artifact-ct"}