When the x-ray source is positioned above the table and the image receptor below, where is most scatter radiation directed?

When the x-ray source is positioned above the table and the image receptor is below, most of the scatter radiation is directed upward toward the staff members' upper bodies. This occurs because the x-rays emitted from the source interact with the patient's body and other materials, causing scattering. The majority of this scatter radiation tends to move in the direction opposite to the beam, which is upwards when the source is above.

In clinical situations, staff members often stand close to the patient, typically in positions that would put them at risk of exposure to this upward scatter. Understanding how scatter radiation behaves is essential for ensuring proper shielding and minimizing radiation exposure for healthcare personnel. This concept emphasizes the importance of appropriate positioning and protective measures, such as lead aprons and barriers, in the fluoroscopy suite to protect staff from scatter radiation.