LANGE RADIOGRAPHY : RADIATION PROTECTION: TEST REVIEW
QUESTIONS WITH COMPLETE SOLUTIONS
1) What is the name of the particularly radiosensitive male sex cell? -- Answer ✔✔
Spermatogonia
2) What is the target organ believed responsible for radiation-induced leukemia? --
Answer ✔✔ Bone marrow
3) What radiation exposure dose to the ovaries will result in temporary infertility? -
- Answer ✔✔ 200 rad (2 Gy)
4) In which portion of pregnancy is the embryo/fetus most radiosensitive? --
Answer ✔✔ The first trimester
5) What is defined as "the estimated dose to the gonads that, if received by the total
population gene pool, would produce the total genetic effect on the population as
the sum of the individual doses actually received"? -- Answer ✔✔ Genetically
significant dose (GSD)
, 6) What are the three guidelines for determining when the gonads should be
shielded? -- Answer ✔✔ When the gonads are within 5 cm of the collimated
primary beam, when the patient is of reproductive age, and when clinical
objectives permit
7) What three parts of the body should be shielded from the useful beam whenever
possible? -- Answer ✔✔ The lens of the eye, the breasts, the reproductive
organs
8) When a 1-mm Pb flat contact shield is used to shield female reproductive organs,
their dose is reduced by about how much? -- Answer ✔✔ 50%
9) When a 1-mm Pb flat contact shield is used to shield male reproductive organs,
their dose is reduced by about how much? -- Answer ✔✔ 90% to 95%
10) Which of the major interactions between x-ray photons and the tissue cells is a
major contributor to patient dose? -- Answer ✔✔ Photoelectric effect
11) Which of the major interactions between x-ray photons and tissue cells
predominates in the diagnostic x-ray range? -- Answer ✔✔ Compton scatter
12) Which of the major interactions between x-ray photons and tissue cells is
responsible for scattered radiation fog? -- Answer ✔✔ Compton scatter
13) Which of the major interactions between x-ray photons and tissue cells poses a
radiation hazard to personnel? -- Answer ✔✔ Compton scatter
14) Which interaction between x-rays photons and matter involves an outer shell
electron and only partial transfer of energy? -- Answer ✔✔ Compton scatter
QUESTIONS WITH COMPLETE SOLUTIONS
1) What is the name of the particularly radiosensitive male sex cell? -- Answer ✔✔
Spermatogonia
2) What is the target organ believed responsible for radiation-induced leukemia? --
Answer ✔✔ Bone marrow
3) What radiation exposure dose to the ovaries will result in temporary infertility? -
- Answer ✔✔ 200 rad (2 Gy)
4) In which portion of pregnancy is the embryo/fetus most radiosensitive? --
Answer ✔✔ The first trimester
5) What is defined as "the estimated dose to the gonads that, if received by the total
population gene pool, would produce the total genetic effect on the population as
the sum of the individual doses actually received"? -- Answer ✔✔ Genetically
significant dose (GSD)
, 6) What are the three guidelines for determining when the gonads should be
shielded? -- Answer ✔✔ When the gonads are within 5 cm of the collimated
primary beam, when the patient is of reproductive age, and when clinical
objectives permit
7) What three parts of the body should be shielded from the useful beam whenever
possible? -- Answer ✔✔ The lens of the eye, the breasts, the reproductive
organs
8) When a 1-mm Pb flat contact shield is used to shield female reproductive organs,
their dose is reduced by about how much? -- Answer ✔✔ 50%
9) When a 1-mm Pb flat contact shield is used to shield male reproductive organs,
their dose is reduced by about how much? -- Answer ✔✔ 90% to 95%
10) Which of the major interactions between x-ray photons and the tissue cells is a
major contributor to patient dose? -- Answer ✔✔ Photoelectric effect
11) Which of the major interactions between x-ray photons and tissue cells
predominates in the diagnostic x-ray range? -- Answer ✔✔ Compton scatter
12) Which of the major interactions between x-ray photons and tissue cells is
responsible for scattered radiation fog? -- Answer ✔✔ Compton scatter
13) Which of the major interactions between x-ray photons and tissue cells poses a
radiation hazard to personnel? -- Answer ✔✔ Compton scatter
14) Which interaction between x-rays photons and matter involves an outer shell
electron and only partial transfer of energy? -- Answer ✔✔ Compton scatter
