Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Prepump and postpump mean contrast signal intensity (dB) ± 1 SD with mean difference (combined data).
| Prepump SI (dB) | Postpump SI (dB) | Mean difference | ||
|---|---|---|---|---|
| 2400 RPM | 14.5 ± 0.7 | 10.0 ± 1.0 | 4.4 ± 1.2 | p < 0.0001 |
| 2800 RPM | 14.8 ± 0.9 | 11.1 ± 0.7 | 3.7 ± 1.2 | p < 0.0001 |
| 3200 RPM | 14.9 ± 0.6 | 12.2 ± 0.9 | 2.8 ± 1.2 | p < 0.0001 |
| 3600 RPM | 15.1 ± 0.6 | 12.9 ± 1.1 | 2.3 ± 1.3 | p < 0.0001 |
