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+--- Forum: Relaxation (/forumdisplay.php?fid=18)
+--- Thread: TR Question (/showthread.php?tid=14218)
TR Question - Jerca - 09-23-2017 10:32 AM
Hello All,
Quick question: Using a 1.5T, If the following tissues have the following T1 relaxation times (Tissue A=420ms, Tisssue B=920ms & Tissue C=2020ms. Can someone tell me what TR will tissue B fully recover longitudinally?
RE: TR Question - aelster - 09-23-2017 09:58 PM
(09-23-2017 10:32 AM)Jerca Wrote: Hello All,
Quick question: Using a 1.5T, If the following tissues have the following T1 relaxation times (Tissue A=420ms, Tisssue B=920ms & Tissue C=2020ms. Can someone tell me what TR will tissue B fully recover longitudinally?
The general rule is that you need about 5 X T1 to allow a tissue to recover its full longitudinal magnetization. Thus for tissue B with T1=920 ms you would need a TR of at least 5 x 920 = 4600 ms.
RE: TR Question - Jerca - 09-24-2017 10:18 AM
I thought so but wasn't sure. thanks