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.
interventional radiology. interventional radiology. A radiological subspecialty that makes use of imaging technologies to assist and guide invasive procedures, (e.g., the collection of tissue specimens from internal organs, or the placement of catheters, drugs, radioactive materials, or stents within body structures).