Why is the gyromagnetic ratio important for MRI?
606299
cause on this ratio u will control the magnetic field out from the magnet .. and every time u increase the magnetic field u in crease the resonance frequency .. and this frequency the main idea of the imaging on the MRI .. cause on it we will have the T1 and T2 .. which is the techniques of imaging
849221
Many possibilities:\n\nBoost it?  Just amplify the signal.  Can you get inside its circuitry?  Can you get a schematic for it?\n\nThe patient monitor transmitter is probably omnidirectional or close to it.  If its location can be fixed during the MRI, you could use a directional antenna on the transmitter and gain 20 to 30 dB.  You'd then have to point the transmitting antenna towards the reciever.\n\nLikewise, the recieving station is probably omnidirectional and could be made directional, but only if it is monitoring just the one patient.\n\nSimplest would be to move the transmitter and receiver as close as possible, just on opposite sides of the MRI room's wall.  See if that is enough.\n\nTrickiest would be some modification of that shielding wall for a wave guide.  To pipe the radio frequency through the wall. Hobbists use plastic pipe with metallic paint on the inside.  By take one or 90-degree bends within a shielded box, you could prevent MRI EMF from getting out while guiding the patient monitor signal from transmitter to receiver.\n\nThe MRI manufacturer or installer may have encountered this already.  Or the patient monitor manufacturer.\n\nInvite in a local Ham Club to check out the facility and the problem.  Those guys are often very very knowledgable, retired and donate their time for various good causes.  Call your local EMS, Red Cross or County disaster co-ordinator.  They work with volunteer Hams during real and simulated disastors.\n\nHope some of that helps.
191860
A superconductor has made great strides in soft tissue imaging. Magnetic Resonance Imaging (MRI) uses such a magnet. The strength of the magnet is measured in Tesla (or Gauss which is 1000xTesla).\n\nGenerally a cryogen (liquid gas such as Helium or Nitrogen) at 4.2degK provides the cooling of a wire which essentially has no resistance. The energy stored in the maget can continue without opposition for a year.\n\nThe MRI system operates at anywhere from .5T to 3T which allows a human body to be imaged. A great tool to identify and locate precisely an anomaly within soft tissue.
223245
The globe is definately the eye ball.  What the density can be, I don't know.  When is your appointment with the neurologist?  When the radiologist I work for reads out a MRI, and he finds something abnormal, he will usually give examples of what it could be.  It is called a differential diagnosis.  Do you have a report from the radiologist?
37296
NMR stands for Nuclear Magnetic Resonance which is a physical phenomenon based upon the magnetic property of an atom's nucleus. Not all nuclei possess magnetism. NMR studies a magnetic nucleus, like that of a hydrogen atom (1H is the most receptive isotope at natural abundance), by aligning it with a very powerful external magnetic field and perturbing this alignment using an electromagnetic field. The response to the field (the perturbing), is what is exploited in NMR spectroscopy and magnetic resonance imaging.\n\nNMR spectroscopy is one of the principal techniques used to obtain physical, chemical, electronic and structural information about a molecule. It is the only technique that can provide detailed information on the exact three-dimensional structure of biological molecules in solution. Also, NMR is one of the techniques that has been used to build quantum computers.
674033
the chassis wont distort the reading. you need to be encompassed in a diamagnetic material for distortion.
662574
It might be due to the number of unpaired electrons which causes a large amount of net magnetic moment making the material more magnetic.  This is the property of a ferro magnetic material.
539149
A bit rusty, but here it goes - I beleive they subtract fro m the net magnetization. If some of the ions are anti-aligned it is called ferrimagnetic. If the ions anti-align completely it is called antiferrmagnetic.
606554
Not that big!\n\nMagnetism is stronger than gravity by order of thousands.\nThe earths magnetic field is bigger and stronger than the earths gravitational field.\nMagnetism is stronger than gravity otherwise you would not be able to pick things up with a magnet
1059712
http://www.vistaradiology.com/NewFiles/MRI.html
32990
With an MRI, they trace the outline of internal body parts, via the bloodstreem, to greatly aid the imaging.\nPlus, since they are only mildly radioactive, there is little chance of harming the patient.
50619
well, a couple i can think of:\n\n- NMR (which, from looking at your gyromagnetic ratio question, i suspect is your thing, so i wont explain it)\n- hyperfine structure of spectral lines (comes from the coupling of nuclear to electronic spins)\n- you can also stick 'em in the path of a highly accelerated particle beam and measure the scattering as a function of azimuthal angle.  when i worked at SLAC we ran an experiment that did just this.\n\nthat's all i can come up with off the top of my head!
56835
MRI, magnetic resonance imaging, has been used quite extensively recently to explore the function of the brain.
166019
A machine that takes a picture of your insides by magnetic resonance.
674108
The poles of any magnetized item will be at the extreme opposite points...in other words the positive will be as far as it can get from the negative.  In the case of a sphere this would be "top" and "bottom" not core and perimeter.  (Think of the Earth's magnetic poles!).
1005095
The name magnetic resonance imaging is not the original name of MRI.  It was originally called a NRI for nuclear resonance imaging.  The company that first made them didn't want people to think it was a nuclear reaction so they changed the name to magnetic.  It is not a nuclear reaction though, an MRI sends out very strong oscillating magnetic fields.  Every atom in the universe and in your body has a nucleus, and the nucleus has its own oscillating magnetic field.  The magnetic field from the MRI machine interacts with all the little tiny magnetic fields of the atoms and lines them up in the same direction, then can tell the density of it by the density of the atomic nuclei.  The sound you hear from the MRI machine is two fold.  First the magnetic fields are not made by actual magnets, they are electromagnets that run huge currents in circles to create the magnetic fields.  The currents are so big that some of the energy is given off as heat and sound.  This is the loud buzzing sound you hear, similar to buzzing power lines.  The second noise is all the motors that move the electromagnet around so it can look at different parts of the body and different angles.  The electromagnet is very heavy so the motors strain a lot to move it around, creating a lot of noise.
78209
Nope, the magnetic information (not electronic!) doesn't weigh anything, it's all related to the orientation of the "magnetic moment" (up or down) of the atoms i.e. the way atoms are turning (to make it simple). they're not heavier if they turn in one sense than if they does in the other