Lecture 2

Question 1

What is a purpose of x ray machine ?

Answer 1

Provide a specific current (mA) & voltage (kVp) to the x-ray tube
( controls the energy and number of the x-ray photons )

convert electrical energy to electromagnetic energy (x- ray photons)

Question 2

What are the main components of radiographic room ?

Answer 2

1. High Voltage Generator
2. X-ray Tube
3. Operating Console
4. X-ray Table

Question 3

High voltage generator ?

Answer 3

Converts the low voltage supplied from the power company into high Kilovoltage ( produce x rays)

Connected to the x-ray tube via cables
It is also called Transformer

Question 4

X ray generator ?

Answer 4

It controls the energy and number of x rays

Has 2 major parameters that describes x ray exposure such as ?
Kvp and mAs

Question 5

x ray tube support ?

Answer 5

Provides support and mobility for the tube
Has 2 types :
Ceiling mount/ suspension , Sets of rails controls
Floor stand , mounted on floor

Question 6

What is designed to help technologists with various tube locations for creative imaging ?

Answer 6

Tube support

Such as : Floor mounted , Floor to wall mounted , Floor to ceiling mounted , Table supported and overhead suspension

Question 7

X ray tube housing ?

Answer 7

Lead and steel , absorbs radiation
and Prevents x-ray photons from leaking from tub

Question 8

what are other component’s on x ray tube ?

Answer 8

Collimator light , Collimator controls
, Transverse lock and horizontal lock

Question 9

Collimator ?

Answer 9

Attached to tube housing
Controls the size of radiation field
light provides centering lines to aid in alignment of IR to patient

Always collimate smaller than the size of cassette

Question 10

Input device for setting exposure factors, activating the exposure, and on/off powering of the unit is ?

Answer 10

x ray console - control ( located in shielded control booth )

which set technical factors/ make an exposure

Question 11

Control panel of an x ray unit contains ?

Answer 11

The main switch , Indicator light , Exposure button and Control device

Question 12

Radiographic table ?

Answer 12

Specialized unit that supports the patient
Most move in several directions
Moveable IR tray with a grid located under top
Holds bucky ( limit 300Ibs)

Easily cleaned and hard to scratch

Question 13

3 ways of radiographic table ?

Answer 13

Tilting or Non-tilting
Free-floating , motorized or stationary top
Adjustable or non-adjustable height

Question 14

Tilting ?

Answer 14

90-90 tilting table : Can tilt from the horizontal position to a complete vertical position in either direction

90-30 tilting table: Can tilt from the horizontal position to a complete vertical position in one direction and to a 30 degree tilt in the other direction

Question 15

Free floating or stationary top ?

Answer 15

Free floating : Has a locking mechanism that when it is turned off, allows the radiographer to move the table top manually

Motorized : Has a switch that drive the table top in the desired direction

Stationary : The table top does not move, the radiographer must move the patient

Question 16

Adjustable or non -adjustable height ?

Answer 16

Adjustable : The height of the table can be adjusted to a comfortable level for the patient and technologist

Non-adjustable : The height may not be adjusted

Question 17

what are auxiliary equipment ?

Answer 17

Bucky tray , Image receptor , Grids
CR Reader , Darkroom and Collimators

Question 18

Does the grid reduce radiation exposure ?

Answer 18

No because it is placed behind the direct object

Question 19

upright bucky tray ?

Answer 19

A device that holds the IR and/or a bucky (grid)( drawer) in a vertical position

The bucky tray can be found:
In the table or chest board

Holds the cassettes CR or Film Screen

Question 20

Image receptor ?

Answer 20

In table bucky and upright bucky

Question 21

Grid and bucky ?

Answer 21

Devices used to reduce the effect of scatter radiation on image quality

Prevents scatter from reaching the IR

Question 22

What is darkroom ?

Answer 22

Is a controlled environment where X-ray films are processed , Is designed to prevent light exposure that could damage the films

Question 23

What is in darkroom ?

Answer 23

Safe light and Film processor

Question 24

Computed Radiography ?

Answer 24

Re-usable metal imaging plates replace film & cassette
Uses conventional bucky & x-ray equipment

Question 25

C arm x ray equipment ?

Answer 25

Used in interventional procedures , Used in surgery and Dynamic images

Question 26

Image receptors ?

Answer 26

Defined as the device that receives the energy of the x-ray beam and forms the image of the body part

Types : Cassette with film , Image plate
Detector , Portable detector
and Fluoroscopic screen- image intensifier