X-Message-Number: 21581 From: Date: Fri, 11 Apr 2003 07:28:17 EDT Subject: Bottom line on MRI He-3. --part1_75.e8d5fe5.2bc800d1_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit I have made from heavy steel plates the ball bearings cage for a heavy duty milling table. I need it for milling the cast parts of the helium pressure vessel used in MRI He-3 brain reader. In the course of an Internet chat, I have found someone working on recycling He-3 from MRI systems. He complained that I speak about these systems as a future possibility when Duke University for example has experimented with it in the past 5 years. Sorry, I get old, I can't no more cope with the pace of technological progress :-). What has not been done is using it at high pressure and low temperature, what I plan to do in the coming years. Beyond a small demonstrator, there are two problems with that technology (beyond the slow scan and limited picture definition): First, the world production of He-3 is 10,000 liters/year or 100 l. under 100 bars pressure. If there was no recycling, a single experiment with my intended system would consume more than one month of world production (I don't bother with the price problem here:-). Clearly, there must be some efficient recycling and production must be boosted. May be a laser isotopic separator would be a wise investment. Second, there is a big data processing problem. Even using distributed computing, something must be done in this domain. Yvan Bozzonetti. --part1_75.e8d5fe5.2bc800d1_boundary Content-Type: text/html; charset="US-ASCII" [ AUTOMATICALLY SKIPPING HTML ENCODING! ] Rate This Message: http://www.cryonet.org/cgi-bin/rate.cgi?msg=21581