Physics

This work presents an experimental procedure involving susceptometric measurement of a fluid labeled with nanoparticles magnetic and, simultaneously, the detection of vibration of these
nanoparticles by an ultrasound. This vibration was generated by the action of alternating magnetizing field from susceptometric system. Measurements was performed in a paraffin gel phantom with a spherical inclusion of olive oil. The inclusion contains 5% of magnetic nanoparticles (20-30 nm diameter). The magnetoacoustic transducer, used in measurements, was a hybrid system composed of an AC biosusceptometer (ACB) with an ultrasonic transducer fixed in its core.. Using ultrasound power
Doppler image mode was possible to obtain quantitative data on the location and distribution of the particles. On the other hand, using susceptometric image it is possible to estimate the concentration of nanoparticles. Thus, it was shown the complementarity of the data obtained by ultrasound and magnetic images, as well as the feasibility of using magnetic nanoparticles with a future contrast .