MAGNETIC RESONANCE ANALYSIS FOR TOOL DETECTION Russian patent published in 2015 - IPC G01R33/28 

FIELD: physics.

SUBSTANCE: magnetic resonance analysis system comprises radio-frequency (RF) system to generate RF transmission field and gradient system to generate temporary magnetic gradient fields. Control module comprises sequence controller to control said RF system and gradient system for generation of reception sequences including RF pulses and magnetic gradient pulses for generation of magnetic resonance signals. Sequence controller is configured to allow scanning on detection mode. Said scanning process comprises generation of gradient echo-stable state to generate the gradient echo-stable state. Sequence of echo generation with RF clearing allows generation of echo signals with RF clearing. Control module incorporates extra analysis unit to compare gradient echo signals with RF clearing and for tool detection in the object from comparison of gradient echo and echo with RF clearing.

EFFECT: valid detection or tracking of too, irrespective of surrounding medium.

5 cl, 2 dwg