Mock Fluoro Exam
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| Which of the following types of cells is most sensitive to radiation and the most reasonable indicator of somatic effects? a. skin b. red bone marrow c. brain d. muscle | show 🗑
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| show | a. when the deadman switch is activated
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| show | c. mR
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| show | b. Input phosphor must be a min of 6" and max of 9"
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| A switch which requires direct pressure to close the circuit is called a: a. toggle switch b. mAs timer c. circuit breaker d. dead-man switch | show 🗑
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| When performing fluoro procedures the amount of scattered radiation rec'd by the operator is proportional to: a. the intensity from the tube b. the dose rec'd by the patient c. the kVp seeting used d. size of the field | show 🗑
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| show | c. 135
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| show | c. conversion factor
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| CA Radiation Control Regulations require that the individual radiation monitoring records shall be preserved by the employer after termination of employment of a technologist: | show 🗑
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| a. for a period of not less than one year b. for a period of not less than seven years c. for a period of not less than three years d. indefinitely | show 🗑
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| The chief danger to the operator during fluoro exam is possible exposure to the scattered radiation coming primarily from the: a. patient's body b. radiologist c. fluoro tower d. table | show 🗑
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| show | b. acuity
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| show | d. milliamperage
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| show | d. cancer
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| show | b. a limited X-ray tech
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| show | d. shaped contact shield in a athletic supporter
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| A fluoro system equipped w/an ABC mechanism w/the x-ray tube below table, moving the II away from the patient will: a. incr patient dose b. incr the size of the rad field at the table top c. decr patient dose d. reduce image size of an anatomic structure | show 🗑
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| show | b. to operate the camera shutters at the same frequency as x-ray pulsed and thus decrease patient dose
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| If you compare the size of the input phosphor diameter to the size of the output phosphor diameter, this is the formula for: a. flux gain b. brightness gain c. minification gain d. electronic intensification | show 🗑
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| show | d. electrostatic lens site
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| show | a. 1.0-5.0 mA
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| It is essential to keep rad exposure to occupationally exposed persons as low as practicable. The concept is referred to as the ____ concept: a. ALARA b. dose equiv limits c. AWAKE d. Max Permissible Dose | show 🗑
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| When using ABS increasing the kVp beyond the optimum range results in: a. decrease in scatter b. poor subject contrast c. increased image brightness d. increased patient dose | show 🗑
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| show | a. controlled area
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| High radiation area (X-ray rooms w/fluoro exams are being carried out are considered to be high rad areas) | show 🗑
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| show | area, accessible to individuals, in which radiation levels could result in an individual receiving a dose equivalent in excess of 0.005 rem (0.05 mSv) in 1 hr at 30 cm from the radiation source or from any surface that the radiation penetrates.
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| show | b. increasing patient exposure
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| Of the following, which is NOT a factor of cell radio sensivity? a. cell differentiation b. length of time the cell is in active proliferation c. degree of mitotic activity d. size of the cell | show 🗑
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| The apparent improvement that the fluoroscopist observes w/II from conventional fluoro screens is a result of increase visual acuity of: a. scotopic b. night vision c. photopic d. peripheral vision | show 🗑
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| The line pair grid is used to measure: a. intensification factor b. resolution - resolving power c. conversion factor d. contrast ratio | show 🗑
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| Conversion Factor: Defined as being the ratio of the output screen luminance in candela per square meter to the input exposure rate in millirads per second. | show 🗑
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| show | The ratio of the brightness on the open field at a given exposure to the brightness underneath a lead disk covering 10 percent of the useful central imaging area in a second exposure. Contrast for modem image intensifiers exceeds 15:1
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| Radiation safety guidelines are based on what type of exposure curve? a. non-linear threshold b. linear, non-threshold c. non-linear, non-threshold d. linear, threshold | show 🗑
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| show | a. every year
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| show | b. 0.2 seconds
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| Which of the following is most effective in reducing patient dose? a. video cassette recorder b. cinefluoroscopy c. TV viewing in the room d. video disc recorder | show 🗑
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| The minimum total filtration permanently required in the useful beam of a fluoroscopic tube is: a. 1.5 mm Al b. 2.5 mm Pb c. 2.5 mm Al d. 0.25 mm Pb | show 🗑
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| When positive contrast media are used, the primary x-ray interaction taking place within the contrast media is: a. coherent scattered b. absorbing scattered c. Compton scattered d. photoelectric effect | show 🗑
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| The purpose of a 5 minute timer is to: a. terminate the exposure b. open the circuit c. protect the operator d. protect the patient | show 🗑
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| show | a. collimating to area of interest
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| show | a. 400-500 mR/hr
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| show | a. 0.25 mm Pb
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| show | d. 0.5 mm
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| show | d. total over framing
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| The reason for personnel monitoring is to document that no one receives more than: a. MPD equivalent b. 1/10 MPD c. 1.25 per quarter d. 5000 MR | show 🗑
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| During a CINE exam in which 35 mm film and frame rate of 30 frames/second are utilized, what is the approx exposure to the skin for 1 minute of CINE: a. 1000-5000 mR/min b. 50-100 R/min c. 10-20 R/min d. 5000-10000 mR/min | show 🗑
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| show | b. spacer
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| The purpose of ABS in an image intensifier is to: a. eliminate the need for a tech to set technique b. limit the exposure rate to the patient c. to keep the dose rate at 10R/hr d. provide variable exposure rates | show 🗑
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| show | b. remains the same
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| show | c. 0.25
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| show | d. electrostatic lenses
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| show | b. ionization
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| show | a. increasing distance from the source of radiation
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| show | b. 18,12
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| During fluoroscopic imaging you can reduce patients dose by: a. moving the source further away b. increasing exposure time c. moving the source closer d. decreasing kVp | show 🗑
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| Which of the following individuals is responsible for the quality, radiation safety and technical aspects of all x-ray exams? a. radiation physicist b. CEO c. supervisor (registered user) d. chief technologist | show 🗑
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| show | c. patient skin exposure decreases
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| Exposure rate is least effected by which of the following? a. film recording device b. mA c. filtration d. kVp | show 🗑
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| show | c. video disc recorder
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| show | d. age x 1 REM
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| show | c. poor working habits shielding
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| show | a. Kell factor
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| Which of the following serves as the primary protective barrier for a dedicated C-arm unit? a. primary wall barriers b. input phosphor of the II c. the patient d. led curtain hanging from the II | show 🗑
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| For fixed fluoroscopic tube, the distance from the source (x-ray tube) to the tabletop shall be: a. 12 inches b. 18 inches c. 24 inches d. 15 inches | show 🗑
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| A film badge report expresses an individuals dose equivalent in: a. rems b. rads c. ergs d. roentgens | show 🗑
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| Which of the following days of a menstrual cycle would be considered the safest time to expose a women of childbearing age? a. day 1-10 b. day 10-14 c. day 14-28 d. all days are equally safe | show 🗑
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| show | b. 1 rad
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| show | a. 4050 (81 x 50)
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| All fluoro and radiographic x-ray tubes must have "diagnostic type tube housing" meaning the leakage radiation at one meters distance may not exceed ___ mR per hour: a. 10 b. 25 c. 100 d. 50 | show 🗑
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| show | a. 2-8 weeks gestation
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| show | b. outside the apron at collar level
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| When changing from 4.5" input phosphor to a 9" input phosphor, the minification gain in increased by a factor of: a. 4 b. 25 c. 8 d. 2 | show 🗑
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| show | a. 5 R/min
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| The output light gain (at the output phosphor) to the input of x-ray photons (at the input phosphor) is defined as the: a. resolution gain b. flux gain c. conversion factor d. minification gain | show 🗑
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| The maximum permissible dose for a gravid technologist is? a. 500 mRem b. 500 rad c. 5000 mRem d. 5 R | show 🗑
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| During cinefluorography, the patient dose is directly proportional to the: a. time of exposure b. size of the frame c. frames per second d. all of the answers are correct | show 🗑
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| Quantum mottle is seen as a grainy appearance due to the loss of: | show 🗑
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| a. decrease intensity at edge of image b. absorbed photon due to statistical fluxations of x-ray photons c. fall of brightness at the periphery of the image d. flaring of image, known as pincushion distortion | show 🗑
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| show | d. detail
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| The output intensity of a fluoroscopic tube is measured in: a. mR b. rems c. ergs d. milliamperes | show 🗑
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| Image quality utilizing an image intensifier is improved as the size of the x-ray beam is tightly collimated because: | show 🗑
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| show | a. less scattered radiation reaches the input phosphor
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| show | a. spot film radiograph
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| The half value layer determines the x-ray: a. density b. quality c. contrast d. quantity | show 🗑
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| show | c. contrast
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| If a protective apron of 0.25 mm lead is worn what is the typical exposure reduction? a. 97.5% b. 55% c. 87% d. 99.9% | show 🗑
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| For an overhead fluoroscopy tube, which of the following would be the proper intensity and method of measurement? | show 🗑
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| show | b. 5 R/min with a 9" water phantom 30 cm above the tabletop
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| show | b. measurment of mA and kVp levels on a phantom
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| show | c. virtual image
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| The ability to distinguish separate objects in line pairs per mm is called: a. resolving power b. detail c. enhanced contrast d. brightness | show 🗑
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| Lead aprons worn during fluoroscopic procedures are designed to protect the radiographer from: a. leakage radiation b. compton scattered radiation c. primary radiation d. photoelectric effect | show 🗑
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| Which of the following does not affect the amount of scattered radiation produced? a. focal spot size b. body thickness c. kVp d. collimation | show 🗑
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| show | b. 4.0 lp/mm
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| show | b. 1.5 to 2 times higher
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| show | c. 100 mR/hr
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| The standard internation unit for absorbed dose is: a. joule b. erg c. sievert d. gray | show 🗑
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| Assume that a fluoroscope using 2.8 mA emits 1.4 R/mA. If an UGI exam requires 5 minutes of fluoro time, the patient's total amount of exposure is: a. 3.92 R b. 14.0 R c. 7.0 R d. 19.6 R | show 🗑
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