Question 2827
{"accessible":false,"alternatives":[{"id":13797,"text":"increasing field of view size"},{"id":13798,"text":"increasing imaging depth"},{"id":13799,"text":"increasing line density"},{"id":13800,"text":"increasing number of focal zones"},{"id":13801,"text":"increasing pulse repetition frequency"}],"archived":false,"correctAlternativeId":13801,"explanation":"\u003cp\u003eIncreasing pulse repetition frequency reduces pulse repetition period. This means the receive time needs to decrease. A reduction in receive time mean we can only image shallower depths. Reducing image depth shortens the time taken to acquire each scan lane, which increases frame rate (improving temporal resolution).\u003c/p\u003e\u003cp\u003eLarger field of view, increased line density, more focal zones and imaging greater depths all decrease frame rate/temporal resolution.\u003c/p\u003e","id":2827,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2837","nextQuestionPath":"/articles/pulse-repetition-frequency/questions/2826","relatedArticles":[{"id":68369,"title":"Beam focusing","link":"/articles/beam-focusing?lang=us"},{"id":77444,"title":"Temporal resolution (ultrasound)","link":"/articles/temporal-resolution-ultrasound?lang=us"}],"alsoUsedIn":[{"id":1615,"kind":"RestrictedPage","title":"Page 1615 (in no courses)","link":"https://radiopaedia.org/admin/restricted_pages/1615"},{"id":1979,"kind":"Course","title":"Imaging Physics: Ultrasound Peer Review - page 1979","link":"https://radiopaedia.org/courses/imaging-physics-ultrasound-peer-review/pages/1979"},{"id":1979,"kind":"Course","title":"Imaging Physics: Ultrasound - page 1979","link":"https://radiopaedia.org/courses/imaging-physics-ultrasound/pages/1979"}],"stem":"\u003cp\u003eWhich of the following improves temporal resolution in ultrasound imaging?\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/2827"}],"attemptsPercentages":[{"alternativeId":"13800","percentage":7},{"alternativeId":"13799","percentage":12},{"alternativeId":"13801","percentage":74},{"alternativeId":"13798","percentage":3},{"alternativeId":"13797","percentage":4}],"promptToLogin":false,"questionManager":false,"articleId":"pulse-repetition-frequency"}