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. 2019 Feb 8;81(6):3628–3642. doi: 10.1002/mrm.27675

Table 3.

Phantom permittivity (in relative units) obtained from simulations and measurements

Simulations Measurements
|B1+| and B1+ phase (noiseless) |B1+| and transceive phase (noiseless) |B1+| a and transceive phase |B+1| and transceive phase
Inner compartment Outer compartment Inner compartment Outer compartment Inner compartment Outer compartment Inner compartment Outer compartment
TRUEb 80 36 80 36 80 36 80 36
INPUTc 80.64 ± 0.59 36.42 ± 0.76 80.45 ± 2.76 36.21 ± 5.94
AFI 74.69 ± 2.28 43.28 ± 3.46 74.49 ± 3.13 43.07 ± 6.66 73.79 ± 95.75 43.04 ± 26.14 83.77 ± 103.00 38.65 ± 31.85
BS 74.71 ± 2.26 42.74 ± 3.63 74.52 ± 3.11 42.52 ± 6.78 74.52 ± 44.02 42.57 ± 12.48 72.34 ± 47.65 38.40 ± 22.38
DREAM 65.02 ± 10.68 49.03 ± 13.86 64.81 ± 10.76 48.80 ± 14.86 63.52 ± 17.00 47.98 ± 28.93 56.87 ± 48.71 55.31 ± 46.69

Mean ± std values were calculated in 2 ROIs corresponding to both compartments. The boundary errors attributed to EPT reconstruction were excluded from the ROIs.

a

Monte Carlo simulation to emulate the MR measurements. B1+ maps were affected by noise, which corrupted the original images I1 and I2.

b

TRUE refers to the permittivity values measured with the dielectric probe and already reported in Table 1.

c

INPUT refers to the permittivity values calculated from the input permittivity (i.e. the permittivity based on the input |B1+| obtained directly from the EM simulation).