Question 1

A technologist declares her pregnancy.Her exposure should

Accepted Answer

The exposure limit is 500 mrem to the fetus during gestation.

Question 2

A technologist is in the room when a patient receives a therapeutic administration of ¹³¹I sodium iodide for thyroid ablation.The technologist should

Accepted Answer

Typical bioassay procedures state that personnel who handle therapeutic quantities of unsealed radioactive sodium iodide or who are in the room during patient administration of these amounts must have a thyroid bioassay between 6 and 72 hours following involvement.

Question 3

Skin that is contaminated with a radioactive material should be washed with soap or a commercial radioactive decontaminating agent

Accepted Answer

Skin contamination is removed by gentle washing with tepid water and soap or a commercial decontaminating agent.Do not irritate or abrade the skin, which may cause absorption of the contamination.

Question 4

The exposure rate from a point source radioactive source is 250 mrem/hr at 2 m.What would be the exposure in mrem/hr at 3 m?

Accepted Answer

When dealing with a point source, the exposure rate is proportional to the inverse square of the distance from the source.

Question 5

A right-handed nuclear medicine technologist puts on a ring badge before work.The ring should probably be worn

Accepted Answer

The ring badge is worn with the sensitive material facing toward the palm of the hand on the hand that is likely to receive the highest exposure.

Question 6

A package arrives with a surface reading of 10 mrem/hr; the label should be

Accepted Answer

The Department of Transportation determines the labeling and packaging requirements.The labeling for radioactive materials is distinctive and is designed to give some important basic information.Unless the shipment is exempt, there will be a package label of a Radioactive White I, Yellow II, or Yellow III, which communicates the general level of exposure from the package.On the label is also marked the TI information, which is a unitless number that communicates the degree of control to be exercised when handling the package and is equal to the mrem per hour exposure at a distance of 1 m from the package.Yellow II label indicates greater than 0.005 mSv/hr (0.5 mrem/hr) but less than or equal to 0.5 mSv/hr (50 mrem/hr).

Question 7

The Geiger-Mueller (GM) meter in a nuclear medicine department was calibrated on December 1, 2006.According to the NRC, arrangements should be made to have the meter recalibrated before

Accepted Answer

According to the NRC, radiation detection equipment must be calibrated annually.

Question 8

According to NRC regulations, the exposure rate in mrem/hr in unrestricted areas should not exceed

Accepted Answer

Surveys must be performed in unrestricted areas to ensure that members of the public are not exposed to dose rates that would contribute more than 100 mrem in 1 year or 2 mrem in 1 hour to any member of the public.

Question 9

Radiation levels outside a room are such that an individual could receive 0.30 rem in 1 hour.According to the Nuclear Regulatory Commission (NRC), the technologist should

Accepted Answer

NRC regulation 10 CFR 20.1902, posting requirements, states: "Posting of high radiation areas.The licensee shall post each high radiation area with a conspicuous sign or signs bearing the radiation symbol and the words 'CAUTION, HIGH RADIATION AREA' or 'DANGER, HIGH RADIATION AREA'." High radiation area means an area, accessible to individuals, in which radiation levels from radiation sources external to the body could result in an individual receiving a dose in excess of 0.1 rem (1 mSv) in 1 hour at 30 centimeters from the radiation source or 30 centimeters from any surface that the radiation penetrates.

Question 10

According to NRC regulations, radioactive waste from P-32

Accepted Answer

Radioactive waste with half-life of 120 days or less may be stored for extensive decay before disposing of material.

Question 11

A nuclear medicine technologist is going to measure the wipe tests that were performed at the end of the day.The instrument with the highest efficiency for this is usually a

Accepted Answer

The high sensitivity of the scintillation detector makes it particularly useful for detecting very low levels of activity.A sodium iodide well counter is used for determination of radioactivity, usually in disintegrations per minute, from wipe tests and leak tests.

Question 12

According to regulations, a radiation area requiring a sign with the radiation symbol and the words "CAUTION RADIATION AREA" is required where individuals could receive a dose equivalent to

Accepted Answer

In posting of radiation areas, the licensee shall post each radiation area with a conspicuous sign or signs bearing the radiation symbol and the words "CAUTION, RADIATION AREA." Radiation area means an area, accessible to individuals, in which radiation levels could result in an individual receiving a dose equivalent to in excess of 0.005 rem (0.05 mSv) in 1 hour at 30 cm from the radiation source or from any surface that the radiation penetrates.

Question 13

A systemic illness caused by high-dose, acute exposure to ionizing radiation that is exhibited in the blood-forming and respiratory (mucosal) tissues and appears after a whole-body dose of about 200 rad (2 Gy) is

Accepted Answer

Hemopoietic syndrome is a systemic illness caused by high-dose, acute exposure to ionizing radiation and is exhibited in the blood-forming and respiratory (mucosal) tissues.It appears after a whole-body dose of about 200 rad (2 Gy).

Question 14

A point source with an exposure rate of 0.20 mrem/hr is placed behind 4 HVL of lead.What is the exposure rate in mrem/hr to the technologist with the shielding in place?

Accepted Answer

1 HVL is the amount of material needed to reduce the radiation intensity by half.

Question 15

Ionization meters should be used when surveying

Accepted Answer

Ion chambers are unable to detect very small amounts of activity such as those associated with contamination.Ionization survey meters may be used to measure high exposure rates accurately and should be used when surveying a large source of radioactivity.

Question 16

The federal agency that is responsible for the regulation of the uses of byproduct material is the

Accepted Answer

The U.S.NRC is responsible for the regulation of the uses of byproduct radioactive material.The regulations are found in Title 10 of the Code of Federal Regulations as referenced throughout this chapter.The general requirements are found in 10 CFR 20, "Standards for Protection Against Radiation," and the sections that further relate to medical uses are found in 10 CFR 35, "Medical Use of Byproduct Material."

Question 17

The federal agency responsible for the regulation of the use of general x-ray-producing machines and machine-generated radioactive material (e.g., PET) isotopes is the

Accepted Answer

There is currently no federal agency with express regulatory responsibility for this equipment; states have been able to regulate these areas.

Question 18

The TLDs store the energy from the exposure in matrices in the TLD material, which

Accepted Answer

The TLD and optically stimulated laser (OSL) badge stores the energy in matrices in the TLD materials which releases the energy by application of heat or laser light when processed.

Question 19

It is determined that a health care worker could receive 300 millirem per year.According to NRC regulations, this worker

Accepted Answer

The conditions of the RAM regulations require that dosimeters be issued to personnel who could receive in excess of 10% of the occupational limit (i.e., 500 millirem/yr).

Question 20

A package with a Transportation Index (TI) of 3 would indicate to the technologist that the package

Accepted Answer

The TI is equal to the mrem/hr at 1 m from the package.

Quiz 5: Radiation Safety in Nuclear Medicine

A technologist declares her pregnancy.Her exposure should

A technologist is in the room when a patient receives a therapeutic administration of ¹³¹I sodium iodide for thyroid ablation.The technologist should

Skin that is contaminated with a radioactive material should be washed with soap or a commercial radioactive decontaminating agent

The exposure rate from a point source radioactive source is 250 mrem/hr at 2 m.What would be the exposure in mrem/hr at 3 m?

A right-handed nuclear medicine technologist puts on a ring badge before work.The ring should probably be worn

A package arrives with a surface reading of 10 mrem/hr; the label should be

The Geiger-Mueller (GM) meter in a nuclear medicine department was calibrated on December 1, 2006.According to the NRC, arrangements should be made to have the meter recalibrated before

According to NRC regulations, the exposure rate in mrem/hr in unrestricted areas should not exceed

Radiation levels outside a room are such that an individual could receive 0.30 rem in 1 hour.According to the Nuclear Regulatory Commission (NRC) , the technologist should

According to NRC regulations, radioactive waste from P-32

A nuclear medicine technologist is going to measure the wipe tests that were performed at the end of the day.The instrument with the highest efficiency for this is usually a

According to regulations, a radiation area requiring a sign with the radiation symbol and the words "CAUTION RADIATION AREA" is required where individuals could receive a dose equivalent to

A systemic illness caused by high-dose, acute exposure to ionizing radiation that is exhibited in the blood-forming and respiratory (mucosal) tissues and appears after a whole-body dose of about 200 rad (2 Gy) is

A point source with an exposure rate of 0.20 mrem/hr is placed behind 4 HVL of lead.What is the exposure rate in mrem/hr to the technologist with the shielding in place?

Ionization meters should be used when surveying

The federal agency that is responsible for the regulation of the uses of byproduct material is the

The federal agency responsible for the regulation of the use of general x-ray-producing machines and machine-generated radioactive material (e.g., PET) isotopes is the

The TLDs store the energy from the exposure in matrices in the TLD material, which

It is determined that a health care worker could receive 300 millirem per year.According to NRC regulations, this worker

A package with a Transportation Index (TI) of 3 would indicate to the technologist that the package

Quiz 5: Radiation Safety in Nuclear Medicine

A technologist declares her pregnancy.Her exposure should

A technologist is in the room when a patient receives a therapeutic administration of 131I sodium iodide for thyroid ablation.The technologist should

Skin that is contaminated with a radioactive material should be washed with soap or a commercial radioactive decontaminating agent

The exposure rate from a point source radioactive source is 250 mrem/hr at 2 m.What would be the exposure in mrem/hr at 3 m?

A right-handed nuclear medicine technologist puts on a ring badge before work.The ring should probably be worn

A package arrives with a surface reading of 10 mrem/hr; the label should be

The Geiger-Mueller (GM) meter in a nuclear medicine department was calibrated on December 1, 2006.According to the NRC, arrangements should be made to have the meter recalibrated before

According to NRC regulations, the exposure rate in mrem/hr in unrestricted areas should not exceed

Radiation levels outside a room are such that an individual could receive 0.30 rem in 1 hour.According to the Nuclear Regulatory Commission (NRC) , the technologist should

According to NRC regulations, radioactive waste from P-32

A nuclear medicine technologist is going to measure the wipe tests that were performed at the end of the day.The instrument with the highest efficiency for this is usually a

According to regulations, a radiation area requiring a sign with the radiation symbol and the words "CAUTION RADIATION AREA" is required where individuals could receive a dose equivalent to

A systemic illness caused by high-dose, acute exposure to ionizing radiation that is exhibited in the blood-forming and respiratory (mucosal) tissues and appears after a whole-body dose of about 200 rad (2 Gy) is

A point source with an exposure rate of 0.20 mrem/hr is placed behind 4 HVL of lead.What is the exposure rate in mrem/hr to the technologist with the shielding in place?

Ionization meters should be used when surveying

The federal agency that is responsible for the regulation of the uses of byproduct material is the

The federal agency responsible for the regulation of the use of general x-ray-producing machines and machine-generated radioactive material (e.g., PET) isotopes is the

The TLDs store the energy from the exposure in matrices in the TLD material, which

It is determined that a health care worker could receive 300 millirem per year.According to NRC regulations, this worker

A package with a Transportation Index (TI) of 3 would indicate to the technologist that the package

A technologist is in the room when a patient receives a therapeutic administration of ¹³¹I sodium iodide for thyroid ablation.The technologist should