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
Registry Review 1
| Question | Answer |
|---|---|
| Bakelite | Cassette front material |
| Magnesium | Cassette front material |
| lanthanum oxybromide | Phosphors classified as rare earth. Rare earth phosphors have a greater conversion efficiency than do other phosphors. A blue-emitting phosphor. |
| gadolinium oxysulfide | Phosphors classified as rare earth. Rare earth phosphors have a greater conversion efficiency than do other phosphors. A green-emitting phosphor. |
| cesium iodide | The phosphor used on the input screen of image intensifiers; it is not a rare earth phosphor. |
| polystyrene | cassette front with very low absorption properties used in mammography |
| polycarbonate | cassette front with very low absorption properties used in mammography |
| europium-activated barium fluorohalide | Computed radiography (CR) IR is a photostimulable phosphor such as europium-activated barium fluorohalide coated on an image plate. |
| calcium tungstate phosphors | In 1896, Thomas Edison developed the calcium tungstate intensifying screen that served to reduce the required exposure to a fraction of that needed without screens. Replaced by rare earth phosphors in the early 1970's. |
| Plastic | Used in grid interspace material |
| Aluminum | Used in grid interspace material |
| Diploe | The inner and outer compact tables of the cranial skull are separated by cancellous tissue |
| Sagittal suture | separates the parietal bones |
| Coronal suture | Separates the frontal and parietal bones |
| Lambdoidal suture | separates the parietal and occipital bones |
| Squammosal | Separates the temporal and parietal bones |
| Bregma | The sagittal and coronal sutures meet which corresponds to the fetal anterior frontanel |
| Lambda | Sagdittal and lambdoidal sutures meet posteriorly which corresponds to the fetal posterior fontanel |
| pterion | The parietal, frontal, and sphenoid bones meet which corresponds with the anterolateral frontanel |
| Vertex | The highest point of the skull |
| Quality factor (RBE) for Gamma rays | 1 |
| Quality factor (RBE) for x-ray photons | 1 |
| Quality factor (RBE) for alpha particles | 20 |
| Quality factor (RBE) for beta particles | 1 |
| Quality factor (RBE) for fast neutrons | 20 |
| Equation to calculate rem | rad x QF = rem |
| Equation to calculate Sv | gy x wr = Sv |
| Rad is equivalent to? | 100 ergs of energy deposited per gram of irradiated material |
| Tree-like branching black marks on a radiograph are usually the result of? | static electriciity |
| What is the annual dose-equivalent limit for the skin and hands of an occupationally exposed individual? | 50 rem, 500mSv |
| What is the dose-equivalent limit for the lens of the eye? | 15 rem, 150 mSv |
| An occupationally exposed individual may receive up to what dose in a given calendar quarter or 13 week period? | 3 rem (30 mSv) Note this is not a forth of the annual dose |
| An occupationally exposed individual may receive up to what dose annually | 5 rem, 50 mSv |
| Chemical fog may be attributed to | Excessive developer temperature, oxidized developer (can happen from exposure to air), and excessive replenishment |
| Compared with slow-speed screens, high-speed screens are often used to: | Minimaize patient dose and keep exposure time to a minimum |
| Silver reclamation may be accomplished in which of the following ways? | Metallic replacement cartridge, electrolytic plating unit, and Removal from used films. |
| Unexposed, undeveloped silver is removed from film emulsion in what type of solution? | Fixer solution |
| the focal spot-to-table distance, in mobile fluoroscopy , must be: | a minimum of 12 inches |
| In Film-screen's which produce a shorter scale? How about a longer scale? | The faster screens (400) will produce higher (shorter-scale) contrast that the slower screens. So faster the screen the shorter the contrast. |
| Which of the following shoulder projections can be used to evaluate the lesser tubercle in profile? | Internal rotation |
| Which of the following shoulder porjections can be used to evauate the greater tubercle in profile? | External rotation |
| In the scotty dog each of the body parts corresponds to which anatomy? Eye, Nose, Body, Ear, Neck, Front foot | Ear - superior articular process; Nose - transverse process; Eye - pedicle; Neck - pars interarticularis; Body - Lamina; Front foot - inferior articular process |
| Boxes of film stored in too warm an area may be subject to | Film fog. Film should be stored in a cool (40-60 degree F), dry (40-60% humidity) place. Exposure to excessive temp or humidity can lead to film fog and loss of contrast. Static marks are a result of low humidity. |
| How does the use of rare earth intensifying screens contribute to lowering the patient dose? | It permits the use of lower mAs. The fater the intensifying screens used, the less mAs required. |
| How does the processor work? #1 | As the exposed film enters the processor from the feed tray, #1 developer section,where exposed silver bromide crystals are reduced to black metallic silver. #2 the fixer,the unexposed silver grains are removed from the film by the clearing agent. |
| How does the processor work? #2 | #3 wash section, where chemicals are removed from the film to preserve the image, improving archival quality. #4 dryer section |
| Controlled area | Is one that is occupied by radiation workers; the exposure rate in a controlled area must not exceed 100mR/week |
| Uncontrolled area | Is one that is occupied by the general population and must not exceed 10 mR/week |
| ERCP | Contrast media is administered using an endoscope with a cannula placed int e hepatopancreatic ampulla (of Vater) |
| Operative cholangiogram | Contrast media is administered using a needle or small catheter placed directly in the common bile duct |
| Percutaneous transhepatic cholangiogram | Contrast media is administered using a very fine needle throught the patient's side and into the liver |
| T-tub e cholangiography | Contrast is administered via an indwelling T-tube for a postoperative or T-tube cholangiogram |
| Medical asepsis | Refers to practices that reduce the spread of microbes, and therefore the chance of spreading disease or infection. Washing your hands is an example of medical asepsis. It reduces the spread of infection, but it does not eliminate all microorganisms. |
| Disinfection | involves the sue of chemicals to either inactivate or inhibit the growth of microbes. |
| Sterilization | The complete killing of all microorganisms |
| Surgical asepsis | Refers to the technique used when performing procedures to prevent contamination |
| What quantity of radiation exposure to the reproductive organs is required to cause temporary infertility? | 200 rad |
| What quanitity exposure to the reproductive organs is required where sterility will result? | 500 rad |
| What quanitity exposure to the reproductive organs will cause menstrual changes in women and decrease the number of sperm in men? | 10 rad |
| Three types of rare earth phosphors? | Gadolinium, Lanthanum, and Yttrium |
| Recorded Detail Increases as: | Focal spot size decreases; SID increases; OID decreases; Motion decreases; Shape distortion decreases; Screen speed decreases |
| Zinc Cadmium sulfide | The fluorescent layer of early conventional fluoroscopicc screens. |
| Size and shape of the II input screen | Diameter 5 to 12 in and convex |
| Minification gain equation | x |
| Flux gain | The ratio of light photons at the output phosphor to the number at the input phosphor. A typical II has a flux gain of approximately 50. |
| Total brightness gain equation | x |
Created by:
katiem55