LET is commonly measured in units of:

LET is commonly measured in units of:

• A. Gray (Gy)
• B. Coulomb/Kilogram (C/kg)
• C. Kilovoltage Peak (kVp)
• D. Kiloelectron Volts per Micrometer (keV per micrometer)

Answer: (D)

Linear energy transfer describes how much energy a radiation particle deposits per unit distance as it travels through matter. Because it’s energy per length, the natural units are energy divided by distance, such as keV per micrometer. In biological tissues, expressing LET as keV/μm makes sense because it reflects how densely the particle ionizes along its path on a microscopic scale. Gray and Coulomb/kg describe energy per mass and exposure, respectively, not energy deposited per distance, and kilovoltage peak is just an external machine setting. So, LET is commonly measured in keV per micrometer. Higher LET indicates more energy deposited per distance and typically more biological damage.

Linear energy transfer describes how much energy a radiation particle deposits per unit distance as it travels through matter. Because it’s energy per length, the natural units are energy divided by distance, such as keV per micrometer. In biological tissues, expressing LET as keV/μm makes sense because it reflects how densely the particle ionizes along its path on a microscopic scale. Gray and Coulomb/kg describe energy per mass and exposure, respectively, not energy deposited per distance, and kilovoltage peak is just an external machine setting. So, LET is commonly measured in keV per micrometer. Higher LET indicates more energy deposited per distance and typically more biological damage.