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Radiation Protection
Chapter 5
| Question | Answer |
|---|---|
| The intensity of light transmitted through a given area of the dosimetry film | Optical Density |
| Serves as a basic for comparison with the remaining dosimeters after they have been returned to the monitoring company for process | Control Monitor |
| Devices used for personnel monitoring of occupational exposure that contains an Al2O3 detector | OSL |
| Resembles an ordinary fountain pen but contain a thimble ionization chamber that measures radiation exposure | Pocket dosimeter |
| Cutie pie | Ionization chamber - type survey meter |
| Contains LiF powder or chips, which functions as a sensing material | TDL |
| Measures the amount of ionizing radiation to which of a TLD badge has been exposed | TDL Analyzer |
| Worn by a pregnant radiographer to monitor the equivalent dose to the embryo-fetus | Second personnel monitoring device |
| Used to calibrate radiographic and fluoroscopic units | Ionization chamber connected to an electrometer |
| Economical type of personnel monitoring device that records whole-body radiation exposure accumulated at a low rate over a long period time. | Film Badge Dosimeter |
| Provides an indication of the working habits and working conditions of diagnostic imaging personnel | Personnel Dosimeter |
| Specific gas-filled radiation detectors that detect the presence of radiation and, when properly calibrated, give a reasonably accurate measurement of the exposure | Radiation Survey Instruments |
| Lists the deep, eye, and shallow occupational exposures of each person in a health care facility as measured by the exposed monitor. | Personnel Monitoring Report |
| Device with an audible sound system that alerts the operator to the presence of ionizing radiation | Geiger-Miller detector |
| Generally used in a laboratory setting to detect alpha and beta radiation and small amounts of other types of low-level radioactive contamination | Proportional counter |
| Radiographic film in a film badge dosimeter that is sensitive to dose ranging from as low as 0.1 mSv (10 mrem) to as high as 5,000 mSv (500 rem). | Radiation - Dosimetry film |
| An instrument that can be used to determine the amount of radiation to which a film badge dosimeter has be exposed | Densitometer |
| Sensing material found in OSL dosimeters | Aluminum oxide (Al203) Detector |
| Sensing material found in TLDs | Lithium Fluoride (LiF) |
| Extremity monitor worn by an imaging professional as a second monitor when performing fluorodcopic procedures that require the hands to be near the primary x-ray beam | TLD Ring |
| Required whenever radiation workers are likely to receive 10% or more of the annual EfD limit of 50 mSv (50 rem) in any 1 year as a consequence of their work-related activities. | Exposure monitoring of personnel |
| Areas of diagnostic radiology that produce highest occupational radiation exposure for diagnostic imaging personnel. | Fluoroscopy, surgery, and special procedures |
| A weak long-lived radioisotope located on one side of the external surface of a GM detector that is used to verify its consistency daily | Check source |
| Keeping radiation exposure to personnel as low as reasonably achievable. | ALARA Concept |
| A graphic plot that demonstrates the relationship of light output, or emitted thermoluminescence intensity, to temperature variation. | Glow curve |
| In keeping with the ALARA concept, most health care facilities issue this dosimetry devices when personnel could receive about _________ of the annual occupational EfD limit in any month, or approximately 0.04 mSv (4 mrem). | 1% |
| What different filters are incorporated into the detector packet of the OSL dosimeter? | Aluminum, Copper, and Tin. |
| Diagnostic imaging personnel should wear a personel dosimeter during routine operations in an imaging facility because the device provides: | An indication of an individual’s working habits. And an indication of working conditions in the facility. |
| The image densities cast by the filters in a film badge dosimeter permit which of the following? | Estimation of the energy of the radiation reaching the badge. |
| Historically, which of the following personnel dosimeters allowed radiation workers to determine occupational exposure received as soon as specific radiation procedure was completed? | Pocket Dosimeter |
| Which of the following instruments should be used in a laboratory to detech alpha and beta radiation and small amounts of other types of lower level radioactive contamination? | Proportion or counter |
| Which of the following devices is used to measure the visible light limited by the sensing material contained in the TLD after exposure to ionizing radiation and heating? | Photomultiplier tube |
| In a health care facility, A radiographer’s deep, eye, and shallow occupational exposures, are measured by an exposure monitor, maybe found on the: | Personnel monitoring report |
| When the negatively and positively charged electrodes in the pocket ionization chamber are exposed to the ionizing radiation, the mechanism does which of the following? | It discharges in direct proportion to the amount of radiation to which it has been exposed. |
| A densitometer is used to measure? | Optical density |
| Radiation survey instruments measure? | The total quantity of electrical charge resulting from ionization of the gas. The rate at which an electrical charge is produce. |
| What do ionization chamber type survey meters, proportional counters, and GM detectors have in common? | Each contains a gas filled chamber. |
| Which of the following radiation monitors is currently the most commonly used dosimeter for monitoring occupational exposure in diagnostic imaging? | OSL |
| Which of the following or disadvantages of using a TLD as a personnel monitoring device ? | It can be read only ones because the readout process destroys and stored information. It is necessary to use calibrated dosimeters with TLD’s. The initial cost is higher than that for a film badge dosimeter service. |
| Before a pocket dosimeter is used to report radiation exposure, the quartz fiber indication of the transparent reading scale should indicate which of the following? | Zero |
| TheOSL dosimeter uses: | An Al2O3 detector |
| A pocket ionization chamber resembles: | An ordinary fountain pen |
| Monitoring company send a control monitor to healthcare facilities along with each batch of dosimeter. You control monitor should be: | Kept in a radiation free area in the imaging facility. |
| Dosimeter reading that exceed a Trigger level sent by the healthcare facility are investigated to: | Ascertain the cause of the reading |
| The TLD readout process: | Destroys the information stored in theTLD |
| And ionization chamber type survey meter is also referred to as a | Cutie pie |
| The increased sensitivity of the OSL dosimeter make it ideal for monitoring employees working in the low-radiation environments and for: | Monitoring of pregnant workers |
| The RSO in a health care facility receives and reviews personnel monitoring report to: | Assess compliance with ALARA guidelines |
| Wearing a personnel dosimeter in a consistent location is the responsibility of the: | Individual wearing the device |
| On termination of employment, a radiographer should receive a copy of: | His or her occupational exposure report |
| When laser light is incident on the sensing material in an OSL dosimeter, the material: | Becomes luminescent in proportion to the amount of radiation exposure received. |
| Which of the following chemicals functions as the sensing material in a thermoluminescent dosimeter? | Lithium Fluoride |
| During a routine radiographic procedures, when a protective apron is not being worn, the primary personnel dosimeter should be attached to the clothing on the front of the body at: | Collar level to approximate the maximum radiation dose to the thyroid and the head and neck. |
| Which of the following requirements should radiation survey instruments fulfill? | Instruments must be reliable by accurately reporting exposure or exposure rate. Instruments must be durable enough to withstand normal use. Instruments should interact with ionizing radiation in a manner similar to the way in which human tissue interact |
| During diagnostic imaging procedures, how should the radiation dose to the abdomen of a pregnant radiographer be monitored during gestation? | It should be obtained from a second radiation monitor worn at the abdominal level. |
| When a radiologic procedure requires the hands of a radiation worker to be near the primary beam, the equivalent dose to the hands of that individual may be determine though the use of: | A TDL ring worn on the hand of the radiation worker. |
| Which of the following instruments is used to calibrate radiographic and fluoroscopic x-ray equipment? | Ionization chamber with electrometer |
| For x-rays and gamma ray photons with energies from 5 keV to in excess of 40 MeV, the ______ gives an accurate reading as low as 1 mrem | OSL Dosimeter |
| Which of the following instrument should be used to locate a lost radioactive source or detector low-level radioactive contamination? | GM detector |
| Which of the following Instruments should be used in an x-ray installation to assess the fluoroscopic scatter radiation exposure rate? | Ionization chamber with electrometer |
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