MEASURING METHOD AND DEVICE FOR MAGNETIC RESONANCE APPLICATIONS

摘要

The invention relates to a measurement device for magnetic resonance applications including:
in a measurement case (12):
a sensor (15) for measuring radiofrequency magnetic fields,a sensor (20) for measuring magnetic field gradients,a sensor (40) for measuring the radiofrequency electric field,a stage for converting the electric signals delivered by the different measurement sensors into light signals,a unit for controlling and processing the signals, connected to the stage for conditioning the measurement case (12) via a beam for transmitting light signals (13), this unit including a stage for converting light signals into electric signals delivered by the sensors.

主权项

1- A measurement device for magnetic resonance applications, including three measurement axes (x, y, z) corresponding to the axis (3) of a main magnetic field and to two transverse axes (x, y) of a closed or half-open space (4) in which are generated radiofrequency electromagnetic fields and magnetic field gradients, characterized in that it includes:
in a measurement case (12):
a sensor (15) for measuring radiofrequency magnetic fields including an assembly of radiofrequency coils (16, 17) for measuring the components of the radiofrequency magnetic fields along both transverse axes (x, y),a sensor (20) for measuring magnetic field gradients including three sets of coils (21, 22, 23) for measuring the magnetic field gradients along the three measurement axes (x, y, z) respectively,a sensor (40) for measuring the radiofrequency electric field including two independent electrically conducting wires (41, 42) mounted in an aligned way, each being surrounded by a material with strong relative dielectric permittivity (43),a stage for conditioning the electric signals delivered by the sensor (15) for measuring radiofrequency magnetic fields, by the sensor (20) for measuring magnetic field gradients, by the sensor for measuring the radiofrequency electric field (40),a stage for converting the electric signals delivered by the various measurement sensors, into light signals,an electric power supply source of the conditioning and conversion stages, a unit (14) for controlling and processing the signals, connected to the stage for conditioning the measurement case (12) via a beam for transmitting light signals (13), this unit including a stage for converting light signals into electric signals connected to means for synchronously controlling the acquisition of the electric signals delivered by the measurement sensors and corresponding to the electromotive forces generated by the various fields inside the space (4), means for displaying and/or recording the electric signals delivered by the sensors.