Larmor frequencies vary anime totally spies naked for different anime totally spies naked atoms.
Hydrogen, for instance, has a Larmor frequency of 42.58
megahertz. Hydrogen, which is a major constituent of anime totally spies naked water and of
carbohydrates such as fat, is very common in the human body. anime totally spies naked if radio
waves at this Larmor frequency are beamed into magnetized hydrogen
atoms, the hydrogen nuclei will absorb the resonant energy until they
reach a state of excitation. When the beam anime totally spies naked goes off, anime totally spies naked the hydrogen
nuclei will relax again, each nucleus emitting a tiny burst of radio
energy as it returns to its original state. The nuclei will also relax at
slightly different rates, depending on the chemical circumstances
around the hydrogen atom. Hydrogen behaves differently in different
kinds of human tissue. Those relaxation bursts can be detected, and
timed, and mapped.
The enormously powerful magnetic field within an MRI anime totally spies naked machine
can permeate the anime totally spies naked human anime totally spies naked body; but the resonant Larmor frequency is
beamed through the body in thin, precise anime totally spies naked slices. The resulting images
are neat cross-sections through the body. Unlike X-rays, magnetic
resonance doesn't ionize and possibly damage human cells. Instead, it
gently anime totally spies naked coaxes information anime totally spies naked from many different types of tissue, causing
them to emit tell-tale signals about their chemical makeup. Blood, fat,
bones, tendons, all emit their anime totally spies naked own characteristics, which a computer
anime totally spies naked then reassembles as a graphic image on
a computer screen, or prints
out on emulsion-coated plastic sheets.
An X-ray is a marvelous technology, and a CAT-scan more
marvelous yet. But an X-ray does have limits. Bones cast shadows in X-
radiation, making certain body areas opaque or difficult to read. And X-
ray images are rather stark and anatomical; an anime totally spies naked X-ray image cannot
even show if the patient is alive or dead. An MRI
scan, on the other
hand, will reveal a great deal about the composition and the health of
living anime totally spies naked tissue. For instance, tumor cells handle their