A New Probe-Array Approach for Fast SAR Measurements

An innovative system for rapid specific absorption rate (SAR) measurements is here proposed. Measurements are carried out by means of a two-dimensional array of radio-frequency dual-polarized probes. The plane-wave spectrum method is subsequently used in order to compute the electromagnetic (e.m.) field at any position inside a flat-phantom. Experimental results obtained with a linear probe-array prototype validate this new concept both for mapping the e.m. field distribution inside the phantom and for SAR measurements. Furthermore, it paves the way to a real-time approach to SAR assessment.