J
John Larkin
Guest
On Sun, 20 Sep 2009 08:25:47 -0700, Fred Abse
<excretatauris@invalid.invalid> wrote:
from the gradient coils.
It was boring.
John
<excretatauris@invalid.invalid> wrote:
I did have a head MRI and I didn't notice anything except the noiseOn Fri, 18 Sep 2009 18:24:32 -0700, John Larkin wrote:
My phosphenes don't look anything like scintillations. I have read that
astronauts see scintillations from high-energy cosmic rays.
Phosphenes may be the equivalent of dithering an ADC to eliminate
quantization errors and increase sub-LSB sensitivity.
I remember reading a report on exposure to EM fields that stated that, LF
fields may cause phosphenes. ISTR that the H field was thought responsible.
Any of your friends in the MRI business know anything about this?
from the gradient coils.
It was boring.
John