In CT scanning, the total amount of energy directed at matter is expressed as

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In CT scanning, the total amount of energy directed at matter is expressed as integral dose. Integral dose is calculated by adding up the dose at each point in the body over the entire scan. It is typically measured in units of gray (Gy) or milligray (mGy). Choice A (Curie) is a unit of radioactivity, not dose. Choice C (Effective Dose) is a measure of the biological effects of radiation, taking into account both the integral dose and the specific tissue irradiated. Choice D (Kerma) is a measure of the energy deposited in a small mass of air due to ionizing radiation.

In CT Scanning, the Total Amount of Energy Directed at Matter