Chapter 11: Equipment Design for Radiation Protection

Modern imaging equipment is designed to maximize _______ and minimize radiation dose. (Fill in the blank)

• image quality

• cost

• noise

• exposure time

Every part of the machine includes _______ to protect both the patient and the technologist.

• safety features

• decorative lights

• extra wires

• colorful stickers

Which of the following is NOT a function of tube housing in imaging equipment?

• A) Prevents radiation from leaking out

• B) Narrows the x-ray beam

• C) Leakage must be < 1 mGy/hr at 1 meter

• D) Protects the technologist

What is the maximum allowable leakage from tube housing at 1 meter?

• < 1 mGy/hr

• < 5 mGy/hr

• < 10 mGy/hr

• < 0.1 mGy/hr

Collimation in imaging equipment helps to:

• Narrow the x-ray beam

• Reduce patient dose

• Improve image quality

• All of the above

Light-localizing collimators help position the patient properly.

• True

• False

What is the minimum filtration required for 70+ kVp in imaging equipment? (Fill in the blank)

• 2.5 mm Al equivalent

• 1.0 mm Al equivalent

• 0.5 mm Al equivalent

• 3.5 mm Al equivalent

Positive Beam Limitation (PBL) automatically adjusts the beam to the size of the image receptor.

• True

• False

Lead aprons used for protection must have at least _______ mm Pb equivalent.

• 0.5

• 0.2

• 1.0

• 0.1

What is the purpose of dosimeters (e.g., TLD, OSL badges)?

• To track worker exposure.

• To measure temperature changes.

• To monitor air humidity.

• To detect sound levels.