Figure 7

Plot showing the power amplitude ratio (expressed in dB) with variation of the relative transmit phase in all 37 subjects. A wide variation is seen in both the relative phase and amplitude in all subjects. Changes with body mass index (BMI) (A), body surface area (BSA) (B), and anterior-posterior/right-left ratio (AP/LR) (C) are shown. No clear pattern of variation is found between the spread of amplitude/phase and subject body type.