What is the major source of exposure to a radiologic technologist?

What is the major source of exposure to a radiologic technologist?

• A. Primary beam
• B. Ambient radiation
• C. Scatter radiation from patient
• D. Leakage from X-ray tube

Answer: (C)

Scatter radiation from the patient is the major source of exposure for a radiologic technologist. When the x-ray beam interacts with the patient’s tissues, photons are deflected in many directions, creating scattered radiation that can reach the technologist who is standing near the patient. This secondary radiation tends to contribute more to occupational dose than other sources under typical working conditions. Ambient room radiation is a constant but small background level, and leakage from the x-ray tube is tightly controlled by protective housing and shielding, usually yielding far less exposure than scatter. The primary beam itself is aimed at the patient and is avoided by the operator through shielding and staying out of the beam’s path, so it is not the main source of exposure to the technologist. To reduce exposure, increase distance from the patient, use shielding, minimize exposure time, and tightly collimate the beam to limit scatter generation.

Scatter radiation from the patient is the major source of exposure for a radiologic technologist. When the x-ray beam interacts with the patient’s tissues, photons are deflected in many directions, creating scattered radiation that can reach the technologist who is standing near the patient. This secondary radiation tends to contribute more to occupational dose than other sources under typical working conditions.

Ambient room radiation is a constant but small background level, and leakage from the x-ray tube is tightly controlled by protective housing and shielding, usually yielding far less exposure than scatter. The primary beam itself is aimed at the patient and is avoided by the operator through shielding and staying out of the beam’s path, so it is not the main source of exposure to the technologist.

To reduce exposure, increase distance from the patient, use shielding, minimize exposure time, and tightly collimate the beam to limit scatter generation.