Fluid pressure in the blood vessels generated by the pumping action of the heart.
The action of passing a liquid through a filter.
To strain or separate by passing liquid through a device to separate wanted from unwanted substances, as in dialysis.
The addition of sheets of metal into a beam of x rays, altering the energy spectrum and thus the imaging characteristics and penetrating ability of the radiation. Filtration is generally provided by aluminum or copper at low to medium energies, and by tin, copper, and aluminum for higher energy beams.
The process of removing particles from a solution by allowing the liquid portion to pass through a membrane or other partial barrier. This contains holes or spaces that allow the liquid to pass but are too small to permit passage of the solid particles.