Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
ASRT Mobile Unit Op.
Mobile Unit Operation and safety
| Question | Answer |
|---|---|
| Which of the following is not a typical component of the mobile fluoro assembly a. control panel b. C-arm c. portable grid d. viewing monitor | c. portable grid |
| Using proper collimation improves 1. rad protection 2. field of view size 3. visualization a1, 2 b. 1,3 c. 2,3 c. 1,2,3 | b. 1 & 3 |
| _ vision uses the cones of the eye, resulting in increased visual activity a. Scotopic b. night c. red-eye d. photopic | d. photopic |
| the surface of the II typically is coated with _ as an input phosphor a. tungsten b. cesium iodide c. zinc d. molybdenum | b. cesium iodide |
| As photoelectrons strike the output phosphor of the II, they are converted into _ aelectron b. protons c. light photons d. x-rays | c light-photons |
| _ is the product of flux gain and minification gain a. total brightness gain b. total magnification gain c. tube current acceleration d. the inverse square law | a. total brightness gain |
| _ transfer and distribute light from the output window of the II to viewing/recording systems a. input phosphors b. storage capacitors c. digitization chambers d. optic coupling devices | d. optical coupling systems |
| The cathode grid assembly in the video tube often is referred to as the _ a. electron gun b. anode c. signal receptor d. signl originator | ?????????? |
| The _ converts the voltage signal from the video camera tube or CCD into visible image a. Image Intensifier b. signal transfer coil c. video monitor d. focusing coils | c. video monitor |
| The average horizontal travel distance of the telescoping C-arm is _cm a. 5 b. 10 c. 15 d. 20 | d. 20 |
| According to the FDA -cm is the minimum SSD allowed when a standard size C-arm is used in a surgical case a. 10 b. 20 c.30 d.40 | c. 30 |
| If all other factors are kept constant, as the SSD increases, the ESE rate a. decreases b. increases c. varies, going up and down d. none of the above; there is no relationship between SSD and ESE | a. decreases |
| The average C-arm height manipulation range is _cm a.6 b.16 c. 46 d. 76 | c. 46 |
| When using standard fluoroscopic mode, the max exposure rate allowed by the FDA is _ roentgen per minute (R/min) a. 5 . b. 10 c. 15 d. 20 | b. 10 R/min |
| When using high-level fluoroscopic mode, the maximum exposure rat allowed by the FDA is _ R/min a. 5 b. 10 c. 15 d. 20 | d. 20 R/min |
| When an Image intensification system is used, the lead equivalent of the primary protective barrier must be _mm a. .5 b. 1 c. 2 d. 2.5 | c. 2 |
| All people present during fluoroscopic exposure must wear protective aprons of at least _mm lead a. .25 b. .5 c. 1 d. 2 | a. .25 |
| If the exam table is raised toward the image receptor, the ESE rate: a. unchainged b. increases c. decreases d. becomes zero | c. decreases |
| As the FOV decreases, the ESE rate a. is unchanged b. increases c. decreases d. becomes zero | b. decreases |
| If a 9-inch FOV is used the fluoroscopic dose mode is changed from low dose to high-dose mode, the ESE rate _ by _% a. decrease;90 b. increase; 90 decrease;73 d. increases; 73 | d increases ; 73 |
| according to the module, one of the most effective ways to reduce total radiation exposure to the patient is to minimize _ a. collimation b. SSD c. beam filtration d. exposure time | d. exposure time |
| The audible 5-minute fluoso time alarm may be reset after _ seconds a. 1 b. 2 c. 10 d. 20 | b. 2 |
| _ is the fluoro technique that allows the practitioner to obtain a permanent image of anything viewed during a live fluoro sequence a. last-image hold b. image integration c. frame grabbing d. spot filming | c. frame grabbing |
| To minimize the occupational exposure, where should the medical personnel be positioned in relation to the fluoroscopic exposure source a. as far away as possible b. as close as possible c. within 1m d. directly behind or over the patient | a. as far away as possible |
| if personnel double their distance from the radiation source, the scatter radiation exposure rate; a. remains the same b. doubles c. decreases insignificantly d. decreases by a factor of 4 | d decreases by a factor of 4 |
| when the x-ray source is below the PT, the majority of scatter radiation is directed toward the _ a. ceiling b. image receptor c. floor d. upper body of medical peronnel in the room | c. floor |
| assuming that the image receptor is positioned near the patient, what will the scatter exposure rate on the image receptor side be compared to the scatter exposure rate on the side of the x-ray source a. the same b. 2 x higher c. 5 x higher d. 5 x lower | d. 5 times lower |
| The amount of scatter radiation produced depends on the 1 pT's ESE rate 2. loc of the medical staff in relation to the pt 3. energy of the x-ray beam a.1,2 b. 1,3 c. 2,3 d 1,2,3 | b 1, 3 |
| the total lifetime rad exposure limit for a 50 yo medical imaginf employee is _ rem a. 5 b. 1 c. 25 d. 50 | d. 50 |
| when a tech wears a waist level dosimeter in addition to a collar-level dosimeter, the waist-level dosimeter should be positioned on the _ surface, _ the protective apron a. anterior; outside b. anterior;beneath c. posterior; outside d posterior;beneath | b. anterior;beneath |
| Using high-dose fluoro mode can lad to radiation induced skin injures in as alittle as _ of the time necessary to casue the same effects when using normal fluoro mode a. 1/2 b. 1/4 c. 1/8 d. 1/10 | d. 1/10th |
| If using high dose fluoro mode with an ESE of 20 R/min, how much exposure time is necessary to cause early transient erythema a. 10 min 12 sec b. 30 min 6 sec c. 1hr 42 min d. 4 hrs 8 min | a 10 min 12 seconds |
| The following org's are responsible for enforcing dose limits in the US except a. NRC b. FDA c. national research council, committee on the biological effects of ionizing radiation d OSHA | c. national research council, committee on the biological effects of ionizing radiation |
| The current effective dose limit for occupational exposure is _ rem per year a. 1 b. 5 c. 15 d. 25 | b 5 |
Created by:
10153562941507187