Some tissues are more sensitive to radiation than others, so an adjustment to the dose equivalent is necessary to reflect the relative risk of damage to various tissues from radiation exposure. The adjustment applied to the value of the dose equivalent is called the tissue weighting factor.Rank the following tissues from least (1) to most (3) susceptible to radiation damage.Group of answer choices123

Which of these quantities impacts on the equivalent dose? Select all that apply. Marks will be deducted for any incorrect responses.Group of answer choicesAbility of the tissue to absorb the radiationThe degree to which the particular type of radiation can cause biological damageEnergy flux of the incident radiationTime over which the radiation is applied

The radiation weighting factor for a type of radiation can be considered as a weighting relating the absorbed dose to biological effect.Dose equivalent = absorbed dose x radiation weighting factorThe higher the radiation weighting factor, the greater the biological impact an absorbed dose will have on the patient. Rank these types of radiation in terms of their radiation weighting factors from lowest to highest.N.B. In the textbook, radiation weighting factor is referred to as quality factor, however this is an older term.Group of answer choices1st (Lowest)2nd3rd (Highest)

damages living tissue and when deciding whether an should take place, we have to weigh up the to the patient from radiation against the potential benefit of having the exposure. Radiology involves striking a balance between and risk for the patient. The benefit is successful and treatment. The risks are radiation-induced in the individual and serious effects in descendants. When applying the principle of , the benefit to the patient of having the exposure must outweigh the risks. A criterion that is often applied is that the exposure is if the result of having the examination will change the clinical management of the patient.

Which of the following are true about radiosensitivity?  Select all that apply.Group of answer choicesIt is proportional to the rate of cell divisionIt varies with the cell cycleIt has no dependence on total doseIt varies with a person’s ageIt depends on the linear energy transfer of the radiationIt is similar for all cells in the body

Exposure of human body to radiation may cause: