"X-ray beam "
"Source image receptor distance "
"The source image receptor distance (SID), is the distance of the tube from the image receptor, affecting magnification. The greater the SID, the less magnification the image will suffer. Although 100 cm is the universally accepted SID, studies have shown that apart from improving distortion issues, increasing the SID from 100 cm to 122 cm decreases entrance skin dose despite any need for an increase in mAs 3."
"The source image receptor distance (SID), is the distance of the tube from the image receptor, affecting magnification. The greater the SID, the less magnification the image will suffer. Although 100 cm is the universally accepted SID, studies have shown that apart from improving distortion issues, increasing the SID from 100 cm to 122 cm decreases entrance skin dose despite any need for an increase in mAs 3."
"The source image receptor distance (SID), is the distance of the tube from the image receptor, affecting magnification. The greater the SID, the less magnification the image will suffer. Although 100 cm is the universally accepted SID, studies have shown that apart from improving distortion issues, increasing the SID from 100 cm to 122 cm decreases entrance skin dose despite any need for an increase in mAs 3."
"The source image receptor distance (SID), is the distance of the tube from the image receptor, affecting magnification. The greater the SID, the less magnification the image will suffer. Although 100 cm is the universally accepted SID, studies have shown that apart from improving distortion issues, increasing the SID from 100 cm to 122 cm decreases entrance skin dose despite any need for an increase in mAs 3."
"The object to image receptor distance (OID) is the distance between the object to the detector. The closer the anatomy is to the detector the less magnification/distortion. One can observe this when observing the shadow cast by the light source onto the anatomy."
Expected headings
"X-ray beam "
"Centring"
"Source image receptor distance "
"Object image receptor distance"
"Centring the anatomy to the central ray on the image receptor will limit beam distortion due to divergence. The point of the central ray is the focal spot on the x-ray tube; therefore one can angle the tube on a stationary axis and maintain the central ray at the level of the joint, seldom applied but useful for imaging that requires longer radiographs e.g. tibia/fibula x-ray."