Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
22 Cards in this Set
- Front
- Back
|
Design features on an x-ray machine
|
1. x-ray tube & tube support
2. collimator assembly 3. x-ray table 4. x-ray generator & control 5. upright image receptor |
|
|
what is:
*x-ray tube is inside of the tube housing *made of pyrex glass *produces x-radiation when high energy electricity is passed through *x-radiation exits the x-ray tube thru a window *in the housing & is directed toward the patient |
x-ray tube & collimator assembly
|
|
|
what is:
*controls the size & shape of the x-ray field directed toward the pt. *projects a high intensity light field on the pt. which represents the area of the x-ray field exposure *may be manual or automatic (PBL) |
collimator assembly
|
|
|
what is:
*may be fixed height or variable height *typically has a four-way "floating" tabletop *some table designs permit a variable-speed, tilting capability *tabletop is HIGHLY radiolucent! |
Radiographic table
|
|
|
what is:
*consist of a cassette tray & radiographic grid *tray holds cassetts tightly in position & is centered to longitudinal axis of table *radiographic grid oscillates during exposure to blur out the lead grid lines *used w/film-screen & computed radiography systems |
Bucky Assembly
*from the Potter-Bucky diaphragm Dr. Gustav Bucky & Dr. Hollis Potter |
|
|
What is:
*control console is the interface b/t & radiographer & the sophisticated electronics of the x-ray machine |
Generator control (control console)
|
|
|
Generator control features:
|
main power
kVp (1000 volts) mA (1/1000 of an amp) timer exposure switch |
|
|
Exposure Technique Selection:
|
*generator consoles permit selection of kVp, mA, S (exposure time) & mAs
*may be operated in the mAs mode or timer mode *technique selection is critical to good radiography |
|
|
what is:
*2 basic designs *facilitage easy & efficient positioning of the x-ray tube assembly around the patient in any orientation *capable of various motions depending on need *ergonomically friendly *pleasing to the pt. eye |
x-ray tube support (stands)
|
|
|
what are the OTC motions
(overhead tubecrane) |
*transverse (crosswise -across the table)
*longitudinal (lenghtwise - right/left toward pt. head or feet)) *vertical (up or down from the ceiling) *tube angulation (pivoting the tube) |
|
|
types of wall-mounted bucky & cassette holders:
|
*vertical upright bucky
*simple wall mounted cassette holder (no grid) |
|
|
what is:
*capable of static radiographic imaging (spot films) *capable of vertical tilting *spot film device w/ image intensifier is at right angle to x-ray tube during fluorscopy *table-top controls of tabletop motions *tube under table |
Radiographic/Fluoroscopic (R/F) system
|
|
|
The device that produces radiation is the ____.
|
x-ray tube
|
|
|
The component that gives the operator control of the exposure factors (technique) is the _____.
|
control console
|
|
|
Milliamperage is usually selectable in increments of ___.
|
100
|
|
|
The primary components of the x-ray tube are _____.
|
anode & cathode
|
|
|
The component that controls the size & shape of the x-ray field is the ______.
|
collimator
|
|
|
The device that holds the x-ray cassette in place under the x-ray table is the _____.
|
Bucky tray
|
|
|
The control that permits x-rays to be produced is _____.
|
rotor-exposure
|
|
|
The component that supports & permits the x-ray tube to be moved in different directions is the _____.
|
tube stand
|
|
|
Pivoting the x-ray tube at the point at which it is attached to its support is ____.
|
tube angulation
|
|
|
The component that allows the radiologist to take radiographs during a fluoroscopic procedure is the ____.
|
spot image device
|
