Question 1812
{"accessible":false,"alternatives":[{"id":9001,"text":"lateral masses of C1 should not overhang the margin of the C2 lateral masses on an odontoid view"},{"id":9002,"text":"normal atlantodental interval can be up to 5 mm"},{"id":9003,"text":"posterior vertebral line is also known as George’s line"},{"id":9004,"text":"prevertebral thickness at C2 should be less than 7 mm"},{"id":9005,"text":"spinolaminar line is where the left and right lamina meet posteriorly in the midline"}],"archived":false,"correctAlternativeId":9002,"explanation":"\u003cp\u003eThe \u003ca href=\"/articles/atlantodental-interval\"\u003eatlantodental interval\u003c/a\u003e should be no more than 3 mm in adults and 5 mm in children. The remaining answer statements are all correct. It is worth remembering that the lateral masses of C1 in children up to the age of 7 can normally overhang the lateral masses of C2 by 6 mm (when adding the offset on the left to the offset on the right).\u0026nbsp;\u003c/p\u003e","id":1812,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/1812","nextQuestionPath":"/articles/atlantodental-interval/questions/1810","relatedArticles":[{"id":57340,"title":"Cervical spine alignment","link":"/articles/cervical-spine-alignment?lang=us"},{"id":71004,"title":"Pseudo-Jefferson fracture","link":"/articles/pseudo-jefferson-fracture?lang=us"}],"alsoUsedIn":[{"id":804,"kind":"Course","title":"X-ray Interpretation: Cervical Spine - page 804","link":"https://radiopaedia.org/courses/x-ray-interpretation-cervical-spine/pages/804"},{"id":804,"kind":"Course","title":"Emergency Radiology Course - Melbourne - page 804","link":"https://radiopaedia.org/courses/emergency-radiology-course-melbourne-2022/pages/804"},{"id":804,"kind":"Course","title":"Emergency Radiology Course - Brisbane - page 804","link":"https://radiopaedia.org/courses/emergency-radiology-course-brisbane-2022/pages/804"}],"stem":"\u003cp\u003eWhich is \u003cstrong\u003eFALSE\u003c/strong\u003e regarding normal lines and measurements on a lateral cervical spine radiograph in adults?\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/1812"}],"attemptsPercentages":[{"alternativeId":"9001","percentage":11},{"alternativeId":"9002","percentage":53},{"alternativeId":"9003","percentage":12},{"alternativeId":"9005","percentage":18},{"alternativeId":"9004","percentage":5}],"promptToLogin":false,"questionManager":false,"articleId":"atlantodental-interval"}