Question 2792
{"accessible":false,"alternatives":[{"id":13622,"text":"absorption"},{"id":13623,"text":"reflection"},{"id":13624,"text":"refraction"},{"id":13625,"text":"reverberation"},{"id":13626,"text":"scatter"}],"archived":false,"correctAlternativeId":13626,"explanation":"\u003cp\u003eMost returning echoes in ultrasound imaging arise from \u003cstrong\u003e\u003cem\u003escatter \u003c/em\u003e\u003c/strong\u003einteractions. This far outweighs the returning echoes from specular reflectors.\u003c/p\u003e\u003cp\u003eRefraction does not produce echoes and reverberation accounts for a small percentage of returning echoes.\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cp\u003e\u003c/p\u003e","id":2792,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2792","nextQuestionPath":null,"relatedArticles":[{"id":31989,"title":"Reverberation artifact","link":"/articles/reverberation-artifact?lang=us"},{"id":55789,"title":"Reflection","link":"/articles/reflection?lang=us"},{"id":46913,"title":"Refraction","link":"/articles/refraction?lang=us"},{"id":46466,"title":"Scattering (ultrasound)","link":"/articles/scattering-ultrasound?lang=us"}],"alsoUsedIn":[{"id":1608,"kind":"RestrictedPage","title":"Page 1608 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/1608"},{"id":1972,"kind":"Course","title":"Imaging Physics: Ultrasound Peer Review - page 1972","link":"https://radiopaedia.org/courses/imaging-physics-ultrasound-peer-review/pages/1972"},{"id":1972,"kind":"Course","title":"Imaging Physics: Ultrasound - page 1972","link":"https://radiopaedia.org/courses/imaging-physics-ultrasound/pages/1972"}],"stem":"\u003cp\u003eEchoes returning to the ultrasound transducer predominantly arise from which tissue interaction?\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/2792"}],"attemptsPercentages":[{"alternativeId":"13624","percentage":3},{"alternativeId":"13625","percentage":1},{"alternativeId":"13623","percentage":56},{"alternativeId":"13626","percentage":38},{"alternativeId":"13622","percentage":2}],"promptToLogin":false,"questionManager":false,"articleId":"absorption-ultrasound"}