Three Principal Parts of X-ray Imaging System

Question 1

WHAT ARE THE THREE PRINCIPLES PARTS OF X-RAY IMAGING SYSTEM

Answer 1

1. Operating Console
2. X-Ray Tube
3. High Voltage Generator

Question 2

Allows the radiologic technologist to control the x-ray tube current and voltage so that the useful x-ray beam is of proper quantity and quality.

Answer 2

Operating Console (Control Console)

Question 3

kVp covers the —— ; The —— the kVp, the —— the quality

Answer 3

kVp covers the quality; The higher the kVp, the better the quality

Question 4

kVp covers the —— ; The —— the kVp, the —— the quality

Answer 4

kVp covers the quality; The higher the kVp, the better the quality

Question 5

refers to the penetrability or permeability of the x-ray beam

Answer 5

Quality

Question 6

energy that determines the penetrating ability of the x-ray

Answer 6

kVp (kilovoltage peak)

Question 7

Controls your kvp and mAs selection (quality and quantity of x-rays)

Answer 7

Control Console

Question 8

mAs covers the —— of x-rays, the —— the mAs, the —— the number of x-rays

Answer 8

mAs covers the quantityof x-rays, the higher the mAs, the higher the number of x-rays

Question 9

refers to the numbers of x-rays or the intensity of the x-ray beam

Answer 9

Quantity

Question 10

Quantity is represented by ——?

Answer 10

the unit MR [milliroentgen] or

mAs [milliampere-second – mA x time (seconds)]

Question 11

measures the intensity of the x-ray beam and the number of electrons crossing from cathode to anode

Answer 11

mAS (milliAmpere)

Question 12

Varies or controls the voltage to 100V-220V.

Answer 12

AUTOTRANSFORMER

Question 13

• Stands for two separate series of connections on the autotransformer.
• Located at the secondary side of the autotransformer.

Answer 13

Major kVp and Minor kVp

Question 14

• Design to supply a precise voltage.
• This control is wired to the primary side of the autotransformer.

Answer 14

Line Compensator

Question 15

allows the voltage to be monitored before the exposure.

Answer 15

Pre-Reading Voltmeter

Question 16

Responsible for X-ray production

Answer 16

X-Ray Tube

Question 17

X-ray tube will not turn on if the current is ——, only runs in ——

Answer 17

X-ray tube will not turn on if the current is AC, only runs in DC

Question 18

part of the Cathode which is being targeted to produce heat

Answer 18

Filament

Question 19

Filament uses —— to release electrons

Answer 19

2200 C

Question 20

the process of heating the filament that leads to the release of electrons

Answer 20

Thermionic Emission

Question 21

• circuit where the x-ray tube is controlled
• controls the heat

Answer 21

Filament Circuit

Question 22

Monitored with an mA meter that must be placed in the tube circuit

Answer 22

Tube Current

Question 23

is connected at the center of the secondary winding of the high voltage step up transformer

Answer 23

mA METER

Question 24

• Separate from the other main circuit of the x-ray machine.
• Consists of mechanical or electronic devices whose action is to
  “MAKE” AND “BREAK” the high voltage across the x-ray tube.

Answer 24

Timer Circuit

Question 25

Determines the number of electrons emitted by the filament

Answer 25

TEMPERATURE OF THE FILAMENT

Question 26

Temperature is controlled by the filament current which is measured in ——?

Answer 26

Ampere

Question 27

Increases the voltage from the power source to create or produce x-ray

Answer 27

High Voltage Generator

Question 28

High Voltage Section of the X-Ray Imaging System

Answer 28

High Voltage Generator

Question 29

Low Voltage Section of the X-Ray Imaging System

Answer 29

Control Console

Question 30

What are the three parts of the HVG?

Answer 30

1. High Voltage Transformer (HVT) 2. Filament Transformer (FT) 3. Rectifier

Question 31

o Is a step- up transformer o Provides **high voltage** to the x-ray tube

Answer 31

High Voltage Transformer (HVT)

Question 32

Turns ratio of high-voltage transformer is usually between ————

Answer 32

500:1to 1000:1

Question 33

o Is in-charged for increasing **the current and the intensity** for the filament to be heated. o Provides **high current** to the x-ray tube.

Answer 33

Filament Transformer (FT)

Question 34

- Device that converts AC to DC

Answer 34

Rectifier

Question 35

General Power source: ?

Answer 35

220 AC

Question 36

Five Types of **X-Ray Timer**

Answer 36

Mechanical Timers Synchronous Timers Electronic Timers mAs Timers Automatic Exposure Controls (Phototimer)

Question 37

works under clock system very simple device used only in some portable and dental units.

Answer 37

Mechanical Timers

Question 38

is the PRECISION DEVICE designed to drive a shaft at precisely 60rps

Answer 38

Synchronous Timers

Question 39

Minimum exposure time of Synchronous Timers

Answer 39

minimum exposure time, 1/17 msec

Question 40

Are the most sophisticated, most complicated and most accurate of the x-ray exposure timers. Can be used for rapid serial exposures.

Answer 40

Electronic Timers

Question 41

Device that is the product of mA and time Determines the number of x-rays emitted

Answer 41

mAs Timers

Question 42

Monitors the product of mA and exposure time and terminates the exposure when the desired mAs is attained.

Answer 42

mAs Timers

Question 43

a device that measure the quantity of radiation reaching the image receptor.

Answer 43

Automatic Exposure Controls (Phototimer)

Question 44

terminates the exposure when the desired density is attained.

Answer 44

Automatic Exposure Controls (Phototimer)

Question 45

Critical component of one type of phototimer is ———?

Answer 45

PHOTOMULTIPLIER SENSING DEVICE