This grid is the typicaldesignation of body materials. Slight variations may occur due to raw material availability.1) Note the material designation imprinted on the valve body or associated tag. The marking includes the valve style, size letter, and body material.
Radial immunodiffusion (RID) is a technique that can quantitatively. determine the concentration of an antigen. Unlike many gel and liquid. precipitation techniques which qualitatively detect antigen, RID is a. sensitive quantitative technique that is often used clinically to detect. patient levels of blood proteins.
Technique 1  : A prelim film is taken to exclude the presence of radio-opaque foreign body. 2  A fine catheter is then inserted into the orifice of the sinus. 3  After a gauze pad has been firmly placed over the orifice to discourage reflux, the contrast medium is injected under fluoroscopic control.here is flow of contrast from the sinus into a focal collection measuring 3.5Ã4.5cm. Seepage of contrast seen into the intramuscular layers of the lateral aspect of the right thigh. Superiorly the contrast extends to the level of hip joint and distally to the level of distal femur (just above the femoral condyles).