Question 2943
{"accessible":false,"alternatives":[{"id":14335,"text":"lengthening TE"},{"id":14336,"text":"lengthening TR"},{"id":14337,"text":"shortening TE"},{"id":14338,"text":"shortening TR"},{"id":14339,"text":"acquisition time is independent of TE and TR"}],"archived":false,"correctAlternativeId":14336,"explanation":"\u003cp\u003eAcquisition time is a function of (proportional to) the TR, number of phase encoding steps, number of signal excitations (averages) and the number of slices.\u003c/p\u003e\u003cp\u003eA longer TR prolongs acquisition time.\u003c/p\u003e\u003cp\u003eAcquisition time is independent of TE. \u003c/p\u003e","id":2943,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2967","nextQuestionPath":null,"relatedArticles":[{"id":14587,"title":"Echo time","link":"/articles/echo-time?lang=us"},{"id":14588,"title":"Repetition time","link":"/articles/repetition-time?lang=us"}],"alsoUsedIn":[{"id":1926,"kind":"Course","title":"Imaging Physics: MRI - page 1926","link":"https://radiopaedia.org/courses/imaging-physics-mri/pages/1926"}],"stem":"\u003cp\u003eWhich of the following will prolong acquisition time?\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/2943"}],"attemptsPercentages":[{"alternativeId":"14335","percentage":12},{"alternativeId":"14339","percentage":13},{"alternativeId":"14336","percentage":73},{"alternativeId":"14338","percentage":2},{"alternativeId":"14337","percentage":1}],"promptToLogin":false,"questionManager":false,"articleId":"acquisition-time"}