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Radiographic Equipme
Radiographic equipment #2
| Question | Answer |
|---|---|
| A line in the center of the x-ray beam and perpendicular to the long axis of the x-ray tube is called the: | Central Ray or CR (the cross hairs) |
| A film that has been exposed but has not yet been processed has a pattern of exposure is called? | Latent image |
| tissues with greater mass, such as bone, will absorb_______ radiation, as compared with less dense tissues, such as fat | More |
| The absorption of x-rays by matter is called? | Attenuation |
| True or False scatter radiation has less energy than the primary beam. | True |
| The image receptor IR usually consists of: | Cassette with film or a phosphor plate |
| Computed Radiography CR is sometimes called a | filmless system |
| Where is the image obtained in computed radiography? | in a phosphor material |
| Computed Radiography CR eliminated the need for a: | dark room |
| The boxlike device attached under the tube housing that allows the limited operator to vary the size of the radiation field is called a: | collimator |
| A device to protect the film from being fogged by scatter ratiation is called a: | Grid or bucky |
| The principle source of scatter radiation is: | the patient |
| The x-ray room has an area that protects the limited operator from scatter radiation and is called the: | Control booth |
| The mechanism on the x-ray tube crane that provides "stops" in a specific location is the: | Detent |
| The image that has been exposed on the film but has not been developed is called: | The latent image |
| The absorption of x-rays by matter is called: | attenuation |
| The image receptor IR system may consist of the following: | Cassette and film |
| A line that is perpendicular to the long axis of the x-ray tube and is in the center of the x-ray beam is called the: | centeral ray |
| The device that protects film from being fogged by scatter radiation is called: | a grid or bucky |
| The purpose of a safety check performed before making an exposure: | Prevent unnecessary radiation exposure |
| A radiation hazard exists in the x-ray room: | throughout the room during exposure |
| A type of filmless x-ray system that produces digital images is called: | Computed Radiography (CR) |
| How can you determine the location of the Centeral ray? | Turn on the collimator light. The crosshairs in the center of the illuminated radiation field indicates the location of the centeral ray. |
| What is the location of remnant radiation? | Between the patient and the film, on the side of the patient opposite that of the x-ray tube. |
| What is attenuation? | Attenuation is the term used to refer to absorption of the x-ray beam. Attenuation results in the production of scatter radiation. |
| What component of the x-ray machine is located in the control booth? | Control console also called the control panel. |
| What should you do before attempting to move the x-ray equipment? | release appropriate locks |
| Where would you look to find a collimator? | On the underside of the x-ray tube housing |
| List the four steps in a pre-exposure safety check. | Before making an exposure, be certain of the following: x-ray room door is closed, No nonessential persons are in the x-ray room, all persons in the control booth are completely behind the lead barrier, No cassettes are in the room except the one in use. |
| How soon is it safe to re-enter the x-ray room after an exposure? | Immediately. x-rays travel at the speed of light and do not linger in the room. They are only present during an exposure. |
| Describe Primary Radiation: | the x-ray beam that leaves the tube and is unattenuated, except by air. It's direction and location are predictable and controllable |
| Describe Remnant Radiation: | What remains of the primary beam after attenuated by matter. The pattern of densities in the matter results in differentail absorption of the radiation, this pattern will be inherent in the remnant radiation and creates the film image. |
| Which common sizes of x-ray film are still manufatured in English dimensions? | 8X10, 10X12 |
| Describe the Trendelenburg position: | The patient is placed on the x-ray table and the table is tilted so the head is lower than the feet. The angle is typically at least 15 degrees. |
| Describe the latent image: | The latent image is the unseen image on the film after exposure |
| Surrounds the x-ray tube and is lined with lead | Tube housing |
| Opening where the x-rays exit the tube: | Tube Port |
| Source of the x-rays: | X-ray tube |
| The x-rays that strike the patient and travel in all directions, inside and outside the body: | Scattered radiation |
| Unwanted image exposure that is caused by scattered x-rays: | Radiation fog |
| Filmless x-ray system that uses a digital format to produce image: | Computed radiography |
| Receives the energy of the x-ray beam and forms the image of the body part: | Image receptor (IR) |
Created by:
nocturnalmom
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