Which devices are used to reduce the effect of scattered radiation on the finished radiograph?

Which devices are used to reduce the effect of scattered radiation on the finished radiograph?

• A. Lead aprons, shielding, patient positioning
• B. Grids, Collimators, Compression Bands
• C. Screen phosphors, Intraoral sensors, Cassette
• D. Anode, Cathode, Target

Answer: (B)

Scatter radiation creates a fog that lowers image contrast. To minimize its effect on the finished radiograph, use devices that limit or remove scatter before the image is formed. Grids are placed between the patient and the image receptor; they absorb much of the scattered photons while mostly letting through the primary beam, though they require a higher exposure to compensate for the absorbed primary photons. Collimators shape the x-ray beam to the region of interest, reducing the amount of tissue irradiated and thus the amount of scatter produced. Compression bands reduce the thickness and density of the area being imaged, further decreasing scatter generation and improving sharpness and contrast. Other options don’t directly reduce scatter on the image: protective shielding, screen materials, sensors, cassettes, and tube components serve different roles in safety or image capture rather than scatter control.

Scatter radiation creates a fog that lowers image contrast. To minimize its effect on the finished radiograph, use devices that limit or remove scatter before the image is formed. Grids are placed between the patient and the image receptor; they absorb much of the scattered photons while mostly letting through the primary beam, though they require a higher exposure to compensate for the absorbed primary photons. Collimators shape the x-ray beam to the region of interest, reducing the amount of tissue irradiated and thus the amount of scatter produced. Compression bands reduce the thickness and density of the area being imaged, further decreasing scatter generation and improving sharpness and contrast. Other options don’t directly reduce scatter on the image: protective shielding, screen materials, sensors, cassettes, and tube components serve different roles in safety or image capture rather than scatter control.