Question 2944
{"accessible":false,"alternatives":[{"id":14340,"text":"radiofrequency pulse shape"},{"id":14341,"text":"radiofrequency transmit bandwidth"},{"id":14342,"text":"receiver bandwidth"},{"id":14343,"text":"slice selection gradient strength"}],"archived":false,"correctAlternativeId":14342,"explanation":"\u003cp\u003eReceiver bandwidth refers to the range of frequencies across the imaging slice during readout. This is determined by the field of view and readout gradient field strength. The receiver bandwidth determines the sampling rate. It does not correlate to slice thickness.\u003c/p\u003e\u003cp\u003eThe slice selection gradient determines the range of frequencies in the longitudinal/slice selection axis. Increasing the amplitude of the slice selection gradient will make the slice thinner. The radiofrequency transmit bandwidth represents the range of frequencies transmitted by the radiofrequency pulse. The higher the bandwidth, the thicker the slice. The radiofrequency pulse shape refers to the complex transmission patterns of the radiofrequency pulse used in an attempt to uniformly excite a specific range of frequencies.\u003c/p\u003e","id":2944,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2963","nextQuestionPath":null,"relatedArticles":[{"id":22023,"title":"Resonance and radiofrequency","link":"/articles/resonance-and-radiofrequency?lang=us"},{"id":21769,"title":"Radiofrequency coils","link":"/articles/radiofrequency-coils-1?lang=us"},{"id":60748,"title":"Effect of gradient strength and bandwidth on slice thickness","link":"/articles/effect-of-gradient-strength-and-bandwidth-on-slice-thickness?lang=us"},{"id":61253,"title":"Radiofrequency receiver","link":"/articles/radiofrequency-receiver?lang=us"}],"alsoUsedIn":[{"id":1927,"kind":"Course","title":"Imaging Physics: MRI - page 1927","link":"https://radiopaedia.org/courses/imaging-physics-mri/pages/1927"}],"stem":"\u003cp\u003eIn magnetic resonance imaging (MRI), which of the following does \u003cstrong\u003eNOT\u003c/strong\u003e affect slice thickness?\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/2944"}],"attemptsPercentages":[{"alternativeId":"14342","percentage":44},{"alternativeId":"14343","percentage":6},{"alternativeId":"14340","percentage":45},{"alternativeId":"14341","percentage":5}],"promptToLogin":false,"questionManager":false,"articleId":"radiofrequency-transmitter"}