In a message dated 1/19/2003 8:49:55 PM Eastern Standard Time, [EMAIL PROTECTED] writes:
> Oooh, when your head turns, can we watch it via MRI > real-time? :) Not quite yet but soon. The problem is that the head coil (the thing your head goes in when you scan it) is too restrictive. It is possible to study joint motion in some MR scanners. The motion correction part of MR has been pretty much solved. Using what are called navigator echos the scanner can keep track of where bodies parts move. This is particullary important in the abdominal region where respiratory motion of the diaghram and movement of the bowel used to wreck havoc on MR scans. It has its most promising application in the heart. With MR you can see the muscles contract, the valves open up the blood flow. Now you can also do this ultrasound which is at its base a real time technique but MR can give that US cannot is simultaneous acquisition of date about perfusion and the status of the coronary arteries. It is the next big thing. But as to the brain; I may have mentioned this before but you can see small head movements. Studies with slight back and force rotation of! the head can reveal shear forces on different parts of the brain (MR elastography). After I saw this I did not move my head for a week. _______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
