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Pt. Care Ch. 8
Radiographic & Fluoroscopic Equipment
| Question | Answer |
|---|---|
| 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
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