In Standard Image Intensification Fluoroscopy,an X-Ray Beam Half-Value-Layer (HVL) of 3

question 10

Multiple Choice

In standard image intensification fluoroscopy,an x-ray beam half-value-layer (HVL) of 3 to 4.5 mm aluminum is considered acceptable when peak kilovoltage ranges from:

• A)50 to 60.
• B)60 to 70.
• C)70 to 80.
• D)80 to 100.

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Definitions:

Iris

Specialized portion of the vascular tunic; the “colored” portion of the eye that can be seen through the cornea.

Fovea Centralis

The fovea centralis is a small depression in the retina of the eye where visual acuity is highest, due to the concentration of cones, which are photoreceptor cells responsible for color vision.

Optic Disc

The point in the eye where the optic nerve connects to the retina, often referred to as the blind spot because it lacks photoreceptors.

Cornea

The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber, contributing to the eye's ability to focus light.