EPR imaging device using microwave bridge translator

A device for Electron Paramagnetic Resonance Imaging, comprising a microwave bridge consisting of a source of electromagnetic radiation (23) in the microwave region, and attenuation and phase shift elements, the output of the said source (23) is connected to one arm of a Circulator or Magic Tee (24), another arm of which is coupled to a resonator (25) through an iris coupling, and the third arm being connected to a conventional microwave detector (27), the output of which is connected to one input of a phase sensitive detector (PSD) (28), whose second input is connected to one output of a conventional modulator (26), the second output of the said modulator (26) is fed to the modulation coils (32) associated with the resonator (25), the output of the PSD (28) being fed to an analog-to-digital converter (ADC) (29), whose output is connected to a Computer (30), the resonator (23) being placed in the magnetic field between the north pole and the south pole of a magnet (31), the microwave bridge translation module(33) adaptable for displacement of the bridge (23), circulator (24), resonator (25) with the sample and detector (27) in such a way that the resonator (25) is located optimally off-center in the magnetic field, the imaging being performed either in cw or in pulsed mode.