In X-ray physics, the half-value layer (HVL) is defined as the thickness of a specified material required to reduce the intensity of the X-ray beam to:

• A One-tenth of its original value
• B One-quarter of its original value
• C Zero
• D One-half of its original value ✓

Explanation

The half-value layer is defined as the thickness of an absorber that reduces the beam intensity to exactly 50 percent of its original value. It is the standard measure of beam quality and filtration in diagnostic radiography.

Reference: Bushberg, The Essential Physics of Medical Imaging, 3rd ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.