A rad is a unit of

A rad is a unit of

• A. X-ray beam intensity
• B. Absorbed dose
• C. Exposure time
• D. Image sharpness

Answer: (B)

Rad is a unit of absorbed dose—the amount of ionizing radiation energy deposited in tissue per unit mass. It reflects how much energy the tissue actually absorbs, which links to potential biological effects. This is different from beam intensity (energy in the beam in air), exposure time (how long the beam is on), or image sharpness (which depends on geometry and motion). In modern terms, the gray is the SI unit for absorbed dose, with 1 rad = 0.01 Gy.

Rad is a unit of absorbed dose—the amount of ionizing radiation energy deposited in tissue per unit mass. It reflects how much energy the tissue actually absorbs, which links to potential biological effects. This is different from beam intensity (energy in the beam in air), exposure time (how long the beam is on), or image sharpness (which depends on geometry and motion). In modern terms, the gray is the SI unit for absorbed dose, with 1 rad = 0.01 Gy.