What is the point of repeating TR signals in MRI

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SUMMARY

The discussion centers on the purpose of repeating the TR (Repetition Time) 90-degree pulse in MRI (Magnetic Resonance Imaging). It is established that modifying the TR time is essential for obtaining varying T1 relaxation times. The participants agree that while echo signals may appear to be read at the same intensity post-90-degree pulse, repeating the TR can enhance the signal-to-noise ratio by averaging multiple Fast Fourier Transform (FFT) results, leading to improved image quality.

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gladius999
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What is the point of repeating the TR 90 degree pulse in MRI? I understand you must modify the TR time to get different T1 times, but since the echo signal is read, would'nt all the echo signals be read to the same intensity after a 90 degree pulse?
 
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Just a guess: you can improve the signal-to-noise ratio by averaging separate FFT results.
 

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