X-Message-Number: 5218 Date: 19 Nov 95 12:50:49 EST From: yvan Bozzonetti <> Subject: SCI.CRYONICS: High definition MRI In msg 5133 B. WOWK says: > Sorry, David, but I design MR brain imaging methods for a >living, and what you say here is hogwash. If you know a way that >simply more computer power can overcome intrinsic signal-to-noise >limits in MRI (or any other noisy data stream), you better write up your >method for Science Magazine right away. Your Nobel Prize is waiting. There is a simple way to upgrade the signal to noise level: Take data for a longer time. With a N-times longer duration you get a square root better S/noise ratio. If you go from 100 seconds to 10^8 s, you have a 1000 times improvement. There is an even better solution: Use a high polarization gas, for example hyperpolarized He3 or Xe and get a millions times stronger signal. Ultrasounds can discriminate between very nearby domains, well beyond what is needed to recover all brain informations. I am not asking for a Nobel prize. Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=5218