Table 1.
Injury Volume Per Treatment Site
| Injury sitea | Transducer frequency (kHz) | Total exposure (minutes) | US hyperecho duration (No. of BWL pulses/103) | MRI injury volume (%)b | Morphometric injury volume (%)b,c | Focal pressure (MPa)d |
|---|---|---|---|---|---|---|
| 1-M | 170 | 5.0 | 30.0 | 1.90 | 2.5 | 6.5 |
| 2-M | 170 | 17.0 | 37.0 | 2.40 | 5.2 | 6.5 |
| 3-U | 335 | 13.3 | 7.8 | 0.03 | <0.1 | 6.3–8.1 |
| 3-L | 335 | 14.0 | 2.6 | 0.07 | <0.1 | 7.3–8.1 |
| 4-U | 335 | 12.0 | 0.8 | 0 | <0.1 | 7.3–8.1 |
| 5-U | 335 | 15.1 | 2.0 | 0.03 | <0.1 | 6.6–8.1 |
| 6-U | 335 | 12.0 | 4.0 | 0.03 | <0.1 | 5.8–8.1 |
| 6-L | 335 | 8.3 | 11.0 | <0.01 | <0.1 | 6.6–8.1 |
| 7-U | 335 | 11.0 | 2.4 | 0.01 | <0.1 | 5.8–8.1 |
| 7-L | 335 | 10.7 | 0.8 | 0.07 | <0.1 | 6.6–8.1 |
a
Classified by kidney number in conjunction with U, M, or L to indicate upper pole, mid-pole, and lower-pole sites, respectively.
b
All injury volumes reported as percent of functional renal volume, which excludes renal sinus structures.
c
The minimum quantitative resolution of the histomorphometric technique is 0.1%.
d
BWL output pressure or pressure range where dynamic hyperechogenicity was observed on B mode US.
BWL = burst wave lithotripsy; US = ultrasound.