Introduction to Radiographic Equipment
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| The x-ray room has an area that protects the limited operator from scatter radiation & is called the: | control booth
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| The mechanism on the x-ray tube crane that provides "stops" in a specific location is the: | Detent
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| The absorption of x-rays by matter is called: | attenuation
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| The image receptor (IR) system may consist of the following: | Cassette and phosphor plate
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| A line that is perpendicular to the long axis of the x-ray tube and is the center of the x-ray beam is called the: | central ray
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| The device that protects the IR from being fogged by scatter radiation is called a: | Grid or Bucky
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| The device that allows the limited operator to vary the size of the radiation field is called the : | collimator
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| The purpose of a safety check performed before making an exposure is to: | protect the patient from unnecessary exposure
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| A radiation hazard exists in the x-ray room: | throughout the room during an exposure
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| A type of filmless x-ray system that produces digital images is called: | computed radiography (CR)
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| Digital images produced using the CR systems use an _________ to process the image. | image reader device
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| The most frequent adverse incident that occurs in a radiology department is: | falling
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| How can you determine the location of the central ray? | Turn on the collimator light. The crosshairs in the center of the illuminated radiation field indicates the location of the center ray.
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| 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.
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| What is meant by attenuation? | Absorption of the x-rays beam in matter, usually the human body.
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| What component of the x-ray machine is located in the control booth? | the control console (located in the control booth), and the transformer cabinet.
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| What should you do before attempting to move the x-ray equipment? | Release appropriate locks
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| Where would you look to find a collimator? | Is a boxlike device attached under the tube housing.
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| How might you determine the size of the radiation field without actually measuring it? | measures 10-12 cm or more in thickness
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| List the four steps in a pre-exposure safety check. | 1. The x-ray room door is closed 2. No non-essential persons are in the x-ray room 3. All persons in the control booth are completely behind the lead barrier 4. No image receptors are in the rooms except the one in use
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| 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.
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| Define the difference between primary and remnant radiation. | Primary: the x-ray beam that leaves the tube and is unattenuated, except by air. Remnant: what remains of the primary beam after it has been attenuated by matter (the patient).
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| What are the common sizes of CR plates? | 8x10, 10x12
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| Describe the Trendelenburg position. | The position of the patient in which the head is lowered at least 15 degrees.
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| Describe the latent image. | The latent image is the unseen image on the film after exposure.
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| Many x-ray projections are done with the patient standing or sitting upright using what device? | Upright Bucky
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| Tube housing | Surrounds the x-ray tube and is lined with lead
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| Tube port | Opening where the x-rays exit the tube
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| X-ray tube | Source of the x-rays
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| Scattered radiation | The x-rays that strikes the patient and travel in all directions, inside & outside the body
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| Radiation fog | Unwanted image exposure that is caused by scattered x-rays
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| Computed radiography (CR) | Filmless x-ray system that uses a digital format to produce
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| Image receptor (IR) | Receives the energy of the x-ray beam and forms the image of the body part
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