Caprius(CAPR), Breast MRI(former ANMR/MAMO) Message Board

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Biotech / Medical : Caprius(CAPR), Breast MRI(former ANMR/MAMO)

CAPR 5.790

-1.5%

Nov 13 3:59 PM EST

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To: James L. Fleckenstein who wrote (2119)	11/14/1997 12:16:00 AM
From: luis a. garcia	Read Replies (1) of 2615

Dc Fleckenstein let me dispense with one issue which is been bugging me about fat supression ... OBTW this is CAPR or Caprius thread now a continuation of the ANMR...thread.. The issue of the 75 HZ difference in the resonance frequency of homogeneous fat from homogeneous water at a magnetic field strength of 0.5T .. i.e.: It would be nearly physically impossible to discriminate real time using hardware as in a heterodyne set saw filter or mixer etc. However the technique becomes realizable once you have it accurately Fourier Transformed into phase and frequency. This is oversimplifying the problem a bit. Because of the artifacts and secondary effects of the system both patient and machine and the differences machine to machine and magnet to magnet.. Therefore it becomes a problem of technique and finesse and yes a higher Field i.e. higher difference makes the secondary effects smaller and less troublesome in comparison. I really believe that with todays technology and a little tweaking and a lot of brain power you can develop reliable fat suppression technique. A very interesting problem and it can spin off additional patents as the special magnets that ANMR has developed recently and power suppliers etc... No doubt the science of builduing good MRi systems is different from wireless telephones in that it depends heavily in signal processing in software as opposed to hardware. At the next post dealing with fat suppression I will explore the special technique patented by Advanced Mammography... aren't you all happy about that pudding breath... luis

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