Question 986
{"accessible":false,"alternatives":[{"id":4940,"text":"the patient is moved continuously through the scanner which advances the x-ray source/detector in discrete increments between image acquisitions"},{"id":4941,"text":"the patient is moved continuously through the scanner while continuous rotation of x-ray source/detector occurs"},{"id":4942,"text":"the patient is moved in a step-wise fashion through the scanner which advances the x-ray source/detector in discrete increments between image acquisitions"},{"id":4943,"text":"the patient is moved in a step-wise fashion through the scanner while continuous rotation of x-ray source/detector occurs"}],"archived":false,"correctAlternativeId":4941,"explanation":"\u003cp\u003eHelical refers to the path of image acquisition\u0026nbsp;through the patient. With\u0026nbsp;the x-ray source/receptors\u0026nbsp;rotating continuously while the patient is moved smoothly through the scanner a helical path is traced through the patient. This data is then reconstructed into volumetric data which can subsequently be used to generate axial, sagittal, coronal or oblique images.\u0026nbsp;\u003c/p\u003e","id":986,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2424","nextQuestionPath":null,"relatedArticles":[],"alsoUsedIn":[{"id":99,"kind":"Course","title":"Emergency Radiology Course - Melbourne - page 99","link":"https://radiopaedia.org/courses/emergency-radiology-course-melbourne-2020/pages/99"},{"id":99,"kind":"Course","title":"Trauma Radiology Course - Sydney - page 99","link":"https://radiopaedia.org/courses/trauma-radiology-course-sydney-2020/pages/99"},{"id":99,"kind":"Course","title":"Trauma CT Brain Learning Pathway - page 99","link":"https://radiopaedia.org/courses/trauma-ct-brain-learning-pathway/pages/99"}],"stem":"\u003cp\u003eWhich of the following best described the term \"helical scanning\" as it pertains to CT?\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/986"}],"attemptsPercentages":[{"alternativeId":"4941","percentage":83},{"alternativeId":"4940","percentage":5},{"alternativeId":"4943","percentage":9},{"alternativeId":"4942","percentage":3}],"promptToLogin":false,"questionManager":false,"articleId":"helical-ct-image-acquisition"}