ARRT SAFETY REVIEW 120 Questions

ARRT SAFETY REVIEW 120 Questions with Complete Solutions 2023

Which cell types have the lowest radiosensitivity:

nerve cells muscle cells spermatids lymphocytes - Correct Answer nerve cells (except in fetal life, they are highly radiosensitive) Which cells are the most radiosensitive in the body - Correct Answer lymphocytes Which interaction between x-ray photons and matter involves a high energy photon and the ejection of an outer shell electron?photoelectric effect coherent scatter Compton scatter pair produciton - Correct Answer Compton scatter What is likely to occur if 250 mGy is accidentally delivered to a recently fertilized ovum?Skeletal anomalies CNS anomalies Spontaneous abortion Childhood malignancy - Correct Answer spontaneous abortion

Primary radiation barriers include: - Correct Answer walls, doors, floors

secondary radiation barriers include - Correct Answer lead aprons, lead gloves, thyroid shields, ceiling In which of the following examinations would an IR front having very low absorption properties be especially important?Abdominal radiography Extremity radiography Angiography Mammography - Correct Answer mammography The most radiosensitive portion of the GI tract is - Correct Answer small bowel Which of the following has (have) an effect on the amount and type of radiation-induced tissue damage?Quality of radiation Type of tissue being irradiated Fractionation

• 1 only 1 / 2

• 1 and 2
• 1 and 3
• all 3 - Correct Answer all 3

How is the intensity of an x-ray photon affected after each time it scatters?Its intensity increases 4 times.Its intensity increases 1000 times.Its intensity decreases 4 times.Its intensity decreases 1000 times. - Correct Answer its intensity decreases 1000 times breaks the DNA molecule into two or more pieces. - Correct Answer main-chain scission incorrect joining of broken DNA fragments. - Correct Answer cross-linking the disruption of a single chemical bond as a result of irradiation. - Correct Answer point lesion Irradiation of macromolecules in vitro can result in main-chain scission cross-linking point lesions

• 1 only
• 1 and 2
• 2 and 3
• all 3 - Correct Answer all 3

The National Council on Radiation Protection and Measurements (NCRP) recommends an annual occupational effective (stochastic) dose equivalent limit of

• mSv.
• mSv.

15 mSv.50 mSv. - Correct Answer 50 mSv What is the established fetal dose-limit guideline for pregnant radiographers during the entire gestation period?

1.0 mSv 5.0 mSv 50 mSv 100 mSv - Correct Answer 5 mSv Which of the following is (are) used to account for the differences in tissue characteristics when determining effective dose to biologic material?Tissue weighting factors (W t ) Radiation weighting factors (W r ) Absorbed dose

• / 2