Figure 4

Near-field MIPs. Transverse 2D thin-slab MIPs of near-field temperatures (i.e., not including the focal spot) inside the skull for the phantom study (a–b) and the lamb study (c–d). (a) and (c) show MIPs when focusing in the plane most distal to the transducer, and (b) and (d) show MIPs when focusing in planes more proximal to the transducer. In both cases, more severe near-field heating can be seen in the lamb study than in the phantom study, in agreement with Figure 3. All MPIs are overlayed on magnitude images.