SOD (Source-to-Object Distance)
SOD refers to the distance from the focal spot of the X-ray source to the center of rotation of the object. This parameter is essential for calculating the geometric magnification of the resulting image. Generally, shortening the SOD relative to the SID (Source-to-Image Distance) increases the magnification ratio.
Alternative terms:
- FOD (Focus-to-Object Distance)
- FCD (Focus-to-Center Distance)
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