LET stands for which radiobiological quantity?

LET stands for which radiobiological quantity?

• A. Local Energy Transmission
• B. Linear Energy Transfer
• C. Lethal Energy Transfer
• D. Light Energy Transfer

Answer: (B)

Linear Energy Transfer is the energy deposited by ionizing radiation as it travels through tissue, per unit length of distance. This measure tells you how densely the radiation releases energy along its track. High-LET radiations (like alpha particles) spend more energy in a shorter path, creating dense ionizations and complex, harder-to-repair DNA damage. Low-LET radiations (like X-rays or gamma rays) deposit energy more sparsely, often resulting in less immediate, more repairable damage. The units are typically keV per micrometer or MeV per millimeter. The other terms aren’t standard descriptors of this energy deposition concept.

Linear Energy Transfer is the energy deposited by ionizing radiation as it travels through tissue, per unit length of distance. This measure tells you how densely the radiation releases energy along its track. High-LET radiations (like alpha particles) spend more energy in a shorter path, creating dense ionizations and complex, harder-to-repair DNA damage. Low-LET radiations (like X-rays or gamma rays) deposit energy more sparsely, often resulting in less immediate, more repairable damage. The units are typically keV per micrometer or MeV per millimeter. The other terms aren’t standard descriptors of this energy deposition concept.