study for next week test
Quiz yourself by thinking what should be in
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| show | nrc
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| show | all
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| show | Oversee the nuclear energy industry
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| show | false
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| show | false
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| The as low as reasonably achievable (ALARA) concept presents an extremely conservative model with respect to the relationship between Ionizing radiation and potential risk True or False | show 🗑
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| show | all
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| Who is responsible for maintaining radiation monitoring records for all personnel and for providing counseling for individuals who receive monitor readings in excess of allowable limits belongs to the | show 🗑
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| show | all
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| To define ALARA, health care facilities usually adopt investigation levels, defined as Level I and Level II. In the United States, these levels are traditionally _______ to ______ the applicable regulatory standards | show 🗑
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| What means “random in nature”? | show 🗑
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| In general, nonstochastic effects occur only after large doses of radiation are received True or False | show 🗑
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| Cancer induced by 2 Gy of radiation is compared with one induced by 0.2 Gy of radiation, the cancer induced by the larger dose is no worse than the cancer induced by the smaller dose but the chance of cancer from the larger dose is: Greater or Lesser | show 🗑
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| show | Damage to the reproductive cells of the human male and female that is caused by irradiation of sperm and ova before conception
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| show | Deterministic effects
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| show | 460 mSv
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| show | true
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| The annual occupational effective dose (EfD) limit does not include: 1. Personal medical radiation exposure from a procedure 2. Natural background radiation exposure 3. Radiation exposure received on the job | show 🗑
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| Medical imaging personnel almost always receive equivalent doses that are close to the annual effective dose limit. True or False | show 🗑
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| Occasional exposure for the purpose of education and training of students under the age of 18 is permitted, provided that special care is taken to ensure that the annual effective dose limit of _____ mSv (_____ rem) is not exceeded | show 🗑
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| show | filter
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| show | reduced; 50
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| What is the purpose of radiographic beam filtration? | show 🗑
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| show | Wedge filter
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| show | smaller than the margins of the image receptor and
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| When using digital fluoroscopy systems, making use of the last-image-hold feature can: | show 🗑
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| Depending on the area of the body being examined with a fluoroscopic image intensification system, for adult patients, a range of ______ kVp is generally used. | show 🗑
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| show | 30; 12
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| When a fluoroscopic image is electronically amplified by an image intensification system, which of the following benefits results? 1. Increased image brightness 2. Saving of time for the radiologist 3. Patient dose reduction | show 🗑
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| show | 10; 10
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| What is the cumulative effective dose (CumEfD) limit to the whole body of an occupationally exposed person who is 52 years old? (in rem) | show 🗑
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| how is luminance measured | show 🗑
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| show | Minimized
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| show | 0.4; 40
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| ____________ conclusive proof exists that low-level ionizing radiation causes a statistically significant increase in the threat of malignancy. | show 🗑
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| Effective dose (EfD) limits may be expressed for: 1. Whole-body exposure 2. Partial-body exposure 3. Exposure of individual organs | show 🗑
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| show | 1,2, and 3
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| show | To minimize the risk of harmful biologic effects to the general public, patients, and radiation workers
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| show | EFD limit
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| show | As low as reasonably achievable
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| show | NRC
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| Determine the cumulative effective dose (CumEfD) to the whole body of an occupationally exposed person who is 27 years old. (milisieverts) | show 🗑
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| show | Other industries that are generally considered reasonably safe
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| show | 1.0 mSv
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| Responsibilities of facility’s radiation safety officer include which of the following? 1. Developing an appropriate radiation safety program 2. Maintaining radiation monitoring records personnel 3. Repairing all broken or defective equipment | show 🗑
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| show | 0.5 mSv, 5.0 mSv
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| show | 50 mSv
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| show | 1 and 2
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| show | OSHA
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| Radiation exposure and associated risk of possible radiation-induced malignancy is the concept behind the establishment of the effective dose limiting system? True or False | show 🗑
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| During a fluoroscopic examination, a resettable cumulative timing device times the x-ray beam-on time and sounds an audible alarm or temporarily interrupts the exposure after the fluoroscope has been activated for what length of time? | show 🗑
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| show | higher
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| show | 1,2, and 3
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| Federal government specifications recommend a minimum total filtration of _____ mm aluminum equivalent for stationary (fixed) fluoroscopic x-ray units operating above 70 kVp. | show 🗑
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| The cassette front containing the carbon fiber absorbs approximately __ as much radiation vs aluminum or cardboard, resulting in a __ dose for the patient because ___ radiographic techniques are required to produce the image | show 🗑
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| show | 80 to 100
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| show | True
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| show | Photomultiplier tube
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| Computed radiography, because of its higher exposure latitude, makes grid use on the pediatric population less necessary than was previously believed True or False | show 🗑
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| CR imaging has greater _______ flexibility than does conventional screen-film radiography. | show 🗑
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| Of the following procedures, which involve extended fluoroscopic time? 1. Biliary drainage 2. Stent and filter placement 3. Urinary or biliary stone removal | show 🗑
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| When settings are changed from one mA to a neighboring mA station, the most that linearity can vary is _____% | show 🗑
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| The control panel, must be located behind a protective barrier that has a radiation-absorbent window that permits observation of the patient during procedures :True or False | show 🗑
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| What material is commonly used in the tabletop of a radiographic examination table to make the tabletop as radiolucent as possible so that it will absorb only a minimal amount of radiation, thereby reducing the patient’s radiation dose? | show 🗑
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| show | 2% of the SID
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| What is the function of a filter in diagnostic radiology? | show 🗑
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| HVL may be defined as the thickness of a designated absorber required to do what? | show 🗑
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| show | True
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| To minimize skin exposure to electrons produced by photon interaction with the collimator, how far below the collimator should the patient’s skin surface be? | show 🗑
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| show | 2.5 mm aluminum equivalent
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| A radiographer will receive most of his/her occupational exposure from which type of radiation? | show 🗑
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| What is the effective dose limit to the fetus of a pregnant radiologic technologist? | show 🗑
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| show | Set standards for using radiation
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| show | .1%
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| What is the effective dose limit a radiation worker may receive to his/her whole body in one year? | show 🗑
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| show | scatter
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| What publication recommends limits of exposure to ionizing radiation? | show 🗑
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| show | 1,2, and 3
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| A "Radiation Area" warning sign must be visible in areas where the exposure rate exceeds ________. | show 🗑
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| show | 2 meters
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| What device alerts the radiologist that 5 minutes of fluoroscopy has elapsed? | show 🗑
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