Remotely positioned MRI system.

摘要

The magnet generates a static non homogeneous magnetic field having a determinable measurement surface wherein both the magnitude and the gradient of the field are constant. Additionally, the device includes an RF antenna for periodically pulsing nuclei in the measurement surface with pulses of the Larmor frequency to initially tilt the nuclei and to subsequently refocus the nuclei. The device also includes a pair of gradient coils which generate gradient fields that are superimposed on the static field to encode the nuclei. The RF antenna subsequently receives a number of encoded spin echo signals from the refocussed nuclei which are averaged by a computer to create a measured response. The nuclei are refocussed and the encoded spin echo signals are received at a rate that is proportional to the gradient of the static flux field. The computer is also used to create an image from a number of measured responses taken from differently encoded spin echo signals.