The region between the surface and point of maximum dose is called - (i) skin sparing effect (ii) Dmax (iii) dose build up region (iv) depth dose. SI unit of KERMA is - (i) Gray (i... The region between the surface and point of maximum dose is called - (i) skin sparing effect (ii) Dmax (iii) dose build up region (iv) depth dose. SI unit of KERMA is - (i) Gray (ii) Sievert (iii) rad (iv) rem. SI unit of exposure is - (i) Roentgen (ii) Curie (iii) Coulomb/Kg (iv) rem.
Understand the Problem
The question is made up of three parts that ask about specific terms and units in radiation physics: the region between the surface and point of maximum dose, the SI unit of KERMA, and the SI unit of exposure. Each part presents multiple-choice options.
Answer
Dose build-up region; Gray; Coulomb/Kg
The region between the surface and point of maximum dose is called the dose build-up region. The SI unit of KERMA is Gray. The SI unit of exposure is Coulomb/Kg.
Answer for screen readers
The region between the surface and point of maximum dose is called the dose build-up region. The SI unit of KERMA is Gray. The SI unit of exposure is Coulomb/Kg.
More Information
The dose build-up region is where the radiation dose rapidly increases before reaching its maximum. Gray is both the unit of absorbed dose and KERMA, which measures kinetic energy released per mass. Coulomb/Kg is the unit of exposure and measures ionization in the air.
Tips
Ensure you distinguish between the units for KERMA and absorbed dose, which can be confusing as they share the same unit.
Sources
- Absorbed Dose - an overview | ScienceDirect Topics - sciencedirect.com
- Radiation Units and Conversion Factors - remm.hhs.gov
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