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Pt. Care Ch. 8

Radiographic & Fluoroscopic Equipment

QuestionAnswer
What is a primary role of a Radiographer? Manipulation of expensive, high-technology x-ray equipment.
List the 5 generic components of a radiographic system: (TCTCS) 1. X-Ray Tube 2. Collimator 3. X-Ray Table 4. Control Console 5. Tube Stand
What part of the x-ray system produces the x-rays and radiation? X-Ray Tube
What is the x-ray tube made of? Either Glass or Aluminum
What is the x-ray tube encased in? Sturdy metal housing
The Metal Housing of the x-ray tube is used for what? Reduction of shock and radiation leakage
What part of the x-ray tube is positive? Anode
Which part of the x-ray tube has the filament? Cathode
What liberates the electron? Cathode
Where are the x-rays emitted? Anode
The x-ray tube converts ___________ to ________? Electricity to X-Rays
What controls the quantity or number of x-rays? mAs
What controls the strength or penetrating power of x-rays? kVp
Where is the collimator attached? Directly below the x-ray tube
What is the collimator made of? A diaphragm or system of diaphragms made of absorbing material.
What is the collimator designed to do? Define the dimensions and direction of a beam of radiation.
Name the 2 functions of the collimator: 1. Limits the x-ray beam 2. Control the size & shape of the x-ray field
The collimator has lead ___________ on the top and bottom of the collimator. Shutters
The act of adjusting the collimator is referred to as what? Collimating or Coning
If you increase the collimation, what happens to the field size? Smaller
An automatic collimation system is called? Positive Beam Limitation
The automatic collimation system detects and adjusts the field size to what device? IR
Computed Radiography requires the use of what additional piece of equipment? Reader
Positive Beam Limitation systems are not used on what type of Radiography? Digital Radiography
What are the 6 classifications of x-ray tables? (1) Tilting (2) Non-tilting (3) Adjustable (4) Non-Adjustable (5) Free-Floating (6) Stationary top
Free Floating or moveable table tops move in how many directions? 2
Free Floating or moveable table tops have what devices to permit movement? Buttons, Foot Switches, Knee Switches
The 2 Types of Tilting Tables are what? 90-90 Tables 90-30 Tables
Which Tilting Table can tilt to a complete 90 degree vertical position? Both
What device is below the table top and above the cassette tray? Bucky Mechanism
The Bucky mechanism works as an __________ grid device. Oscillating
What does the Bucky mechanism do during the exposure to reduce scatter radiation from reaching the image receptor? Moves or vibrates
What does the Bucky mechanism do to contrast? Increases contrast
A ______ tray is also known as a cassette tray and is used for grid work. Bucky
The Bucky Tray does what 2 things? 1. Holds the IR in place under the x-ray table 2. Keeps the IR centered to the table.
What device gives the operator command of the x-ray machine? Control Console
Name the 5 Generic Controls on a Control Console: 1. Main Power 2. kVp 3. mA 4. Time 5. Rotor-Exposure Switch
What 3 controls is collectively referred to as "Technique"? mA, kVp, Time
The location of the Main power is usually where? The location of the Machine power is usually where? 1. On the wall above the Control Console 2. Usually on the Control Console
On most machines, kVp usually ranges from _____ to ______. 30 kVp to 150 kVp
65kVp = ________ Volts? 65,000 volts
Some machines have 2 kVp controls. What are they and what's the difference? Major & Minor; Major in increments of 10, Minor in increments of 2
1A = _____mA 1000
250mA = _____A .25
What is the range of mA on most control consoles? 10mA - 1200mA
mA controls are usually in what increments? 100's
Most routine diagnostic radiography is done between ______ and ______ mA? 100 - 400 mA
The Rotor-Exposure switch must be attached to what? The machine
The Rotor-Exposure switch begins what? The exposure
How many buttons does the Rotor-Exposure switch have? 2
The Rotor-Exposure switches are mechanically _____________ so one must be activated before the other. interlocked
How fast must the Anode rotor be spinning before an exposure can be made and how long does it take to reach that speed? 3600 RPM's ; 1-2 seconds
What terminates the exposure? Timer
Termination of the exposure must be indicated ___________ and ______________. Audibly; Visually
Students have the habit of doing what which ends the exposure too soon? Releasing the exposure switch before the audible tone or light message indicates that the timer has terminated the exposure
What are 5 examples of Tube stands? 1. Floor mounted; 2. Floor to Ceiling; 3. Floor to wall; 4. Overhead suspension; 5. Table Supported
Name the 4 tube movements? 1. Longitudinal 2. Transverse 3. Vertical 4. Tube Angulation
Before moving the x-ray tube, what must be done? release the tube locks
Tube locks are one or both of these kinds of locks? Mechanical & Electrical
When moving the tube left or right of the technologist, what type of tube movement is used? Longitudinal
Moving the tube at right angles toward or away from the technologist, what tube movement is used? Transverse
When moving the tube toward the floor or ceiling, what tube movement is used? Vertical
When pivoting the tube at the point of attachment, what tube movement is used? Tube Angulation
What could happen if you move the tube without releasing the locks? Strip the locks
What are 2 types of Wall-Mounted Systems? 1. Cassette Holders 2. Bucky Holders
What holds the Wall-Mounted Cassette and Bucky Systems in place? Electrical or Mechanical Locks
In Alignment concepts, what 3 devices all move independently? X-Ray Tube, Table Top, & Bucky Tray
When a Bucky tray is being used, what must the Central Ray Tube be Centered on? To the center of the Bucky Tray
What type of imaging is Fluoroscopic? Dynamic
In Fluoroscopic Radiography, what 2 additional devices are used? 1. An additional fluoroscopic x-ray tube under the x-ray table. 2. An Image Intensifier is added to the table and moves with the fluoroscopic x-ray tube under the table
When the x-ray equipment is not being used for Fluoroscopic imaging, what is done with the Image Intensifier? Parked
Fluoroscopic Spot Film Devices are used for what? Obtaining Static radiographs during the fluoroscopic exam
A four on one spot film means what? IR is divided into 4 quarters to form 4 images
Most C-Arm mobile units are used in what setting? Surgery
Created by: foster1317