Frequently Asked Questions

We collected data for 5.51 seconds however time in '.physio' file is 27.13 seconds; Why?
The system is collecting physio data on a constant basis in the background...
Once microbubbles are injected into an animal, how long does it take for them to clear?
This is physiologically dependent, however, on average...
What is the concentration of Vevo micromarker microbubbles once reconstituted, and how long are they stable?
Adding 0.7mL to the micromarker vial will leave you with a concentration...
What do I do if my PW Doppler signal gets cut-off and I can’t visualize the peak velocity?
This is a common occurrence when imaging the aorta in TAC models...
Can I measure pulse wave velocity (pulse propagation velocity) using your system?
Yes, pulse propagation velocity (PPV) can be measured using our Vevo Vasc software...
What is the difference between Color Doppler and Power Doppler?
Color Doppler gives information about directional blood flow and velocity, whereas...
Why is PW Doppler velocity reported as negative?

PW Doppler takes into account blood flow directionality.

How do I locate the renal artery?
The renal artery and renal vein...
How can I differentiate between artery vs vein?
There are three techniques that can be used...
How can I track tumor metastasis using your system?
Our Vevo LAZR-X photoacoustic imaging system enables targeted molecular imaging using exogenous contrast agents...