Figuring out the mesh number is simple. All you do is count the number of openings in one linear inch of screen. This count is the mesh number. A 4 mesh screen means there are four little square openings across one inch of screen. A 100 mesh screen has 100 openings per inch, and so on. Note: As the number indicating the mesh size increases, the size of the openings and thus the size of particles captured decreases. Higher mesh numbers = finer particle sizes. It is very important to remember that mesh size is not a precise measurement of particle size.
Intravascular ultrasound. Intravascular ultrasound (IVUS) is a medical imaging methodology using a specially designed catheter with a miniaturized ultrasound probe attached to the distal end of the catheter. The proximal end of the catheter is attached to computerized ultrasound equipment.
Definition of Intravenous pyelogram. Intravenous pyelogram: An X-ray of the kidneys and urinary tract. Abbreviated IVP. Structures are made visible on an IVP by the injection of a contrast material. Last Editorial Review: 6/9/2016.