Rad Safety Registry Prep

The tabletop exposure rate during fluoroscopy shall not exceed

• 2.1 mGy/min at 80 kVp

• 2.1 mGy/hr at 80 kVp

• 21 mGy/min at 80 kVp

• 21 mGy/hr at 80 kVp

According to the National Council on Radiation Protection and Measurements (NCRP), the monthly gestational dose-equivalent limit for embryo/fetus of a pregnant radiographer is

• .1 mSv

• .5 mSv

• 1.0 mSv

• 5.0 mSv

A time on 1.5 min is required for a particular fluoroscopic exam, whose exposure rate is 150 mGy/h What is the approximate radiation exposure for the radiologic staff present in the fluoroscopy room during the examination

• 100 mGy

• 40 mGy

• 5.62 mGy

• 3.75 mGy

Stochastic/probabilistic effects of radiation are those that:

1. threshold
2. may be described as "all or nothing" effects
3. are late effects

• 1 only

• 1 & 2

• 2 & 3

• 1, 2, and 3

What percentage of public exposure to ionizing radiation is from medical sources?

• 5%

• 10%

• 25%

• 50%

Somatic effects of radiation refer to effects that are manifested:

• in the descendants of the exposed individual

• during the life of the exposed individual

• in the exposed individual and his/her descendants

• in the reproductive cells of the exposed individual

Guidelines for the use of protective shielding state that gonadal shielding should be used

1. if the patient has reasonable reproductive potential
2. when the gonads are within 5 cm of the collimated field
3. when tight collimation is impossible

• 1 only

• 1 & 2

• 1 & 3

• 2 & 3

The interaction between ionizing radiation and the target molecule that is most likely to occur is the:

• direct effect

• indirect effect

• target effect

• random effect

Increasing field size, while leaving technical factors unchanged, will:

• decrease the DAP

• decrease SR production

• increase the DAP

• increase the EFS size

The term used to express kinetic energy released in matter is the

• erg

• gray

• kerma

• rad