Table 3.
Exposure parameters for each parathyroid gland to individual HIFU treatmentsa
| Average depth (mm) | Total exposure time (min) | Total HIFU delivered energy (kJ) | Mean HIFU power (W) | |
| Patient 1-I | ||||
| HIFU1, RI PT | 19.0 | 2.2 | 4.7 | 6.5 |
| HIFU2, RI PT | 16.0 | 2.2 | 5.1 | 3.0 |
| HIFU3, LI PT | 21.4 | 7.0 | 24.0 | 5.5 |
| Patient 2-E | ||||
| HIFU1, LI PT | 20.0 | 3.9 | 20.6 | 5.2 |
| HIFU2, RI PT | 18.0 | 8.9 | 19.9 | 7.9 |
| HIFU3, RI PT | 19.7 | 4.0 | 22.4 | 5.4 |
| Patient 3-N | ||||
| HIFU1, LS PT | 23.8 | 4.0 | 7.8 | 2.6 |
| HIFU2, LS PT | 22.6 | 9.0 | 15.3 | 5.0 |
| Patient 4-D | ||||
| HIFU1, RI PT | 21.8 | 3.1 | 8.6 | 3.7 |
| Patient 5-V | ||||
| HIFU1, RI PT | 19.7 | 2.1 | 11.0 | 5.9 |
a
The HIFU frequency was 3 MHz for all treatments. Total exposure time (duration of HIFU pulses per patient) and HIFU delivered energy [total delivered energy to parathyroid glands (PT) taking into account tissue attenuation] depend on treated PT volume. Due to pauses between pulses (cooling time, repositioning and pauses for other reasons), the mean power applied is quite low. RI, right inferior; LI, left inferior; LS, left superior.