QCP For Radiographic Units

Question 1

Quality control program for rad units

Answer 1

Visual inspection
Environmental inspection
Performance testing

Question 2

Includes checking the main components of the equipment for the proper function

Answer 2

Visual inspection

Question 3

Visual isnpection should be done

Answer 3

Annually

Question 4

Contain all selector for the production of xray

Answer 4

Control panel

Question 5

Visual inspection

Answer 5

Control panel
Overhead tube crane
Radiographic table
Protective lead apparel

Question 6

Control panel inspection

Answer 6

Tube heat sensor
Overload protector indicator
Panel light

Question 7

Mounting braket that holds the xray tube over the xray table

Answer 7

Overhead tube crane

Question 8

Items to inspect include surface condition and cleanliness , angulation switches , angulation indicator, footboard and shoulder braces

Answer 8

Radiographic Table

Question 9

Protective apparel should be radiographed or viewed fluoroscopically every

Answer 9

Six months

Question 10

Miscellaneous Equipment

Answer 10

Calliper presence
Technique chart
Positioning accessories
Intravenous stands

Question 11

Mechanical and electrical safety

Includes evaluation of electrical cables and xray tube

Answer 11

Environmental Inspection

Question 12

Environmental inspection should be done

Answer 12

Annually

Question 13

Evaluates the performance of the xray generator and xray tube

Answer 13

Performance testing

Question 14

Data obtained in performance testing includes radiation measurements

Answer 14

Radiation measurements

Question 15

Most common type of detector

Answer 15

Geiger-Mueller Counter

Question 16

Value obtained from radiation detector is also the

Answer 16

Radiation intensity (roentgen/coulomb per kg)

Question 17

Produce tge same intensity of radiation each time the same sets of technical factors are used

Answer 17

Reproducibility

Question 18

Max variability allowed in reproducibility is

Answer 18

+- 5 %

Question 19

Evaluation of reproducibility requires

Answer 19

Dosimeter

Question 20

Reproducibility variance

Answer 20

(mRmax-mRmin)/(mRmax +mRmin)

Question 21

Emit a specific amount of radiation per unit of xray tube current and time

Answer 21

Radiation output

Question 22

Amount of radiation

Answer 22

mR

uC/kg

Question 23

Unit of xray tube current

Answer 23

mAs

Question 24

Radiation output testing original acceptance value should be

Answer 24

10 %

Question 25

Necessary to remove low energy photons

Answer 25

Proper filtration

Question 26

Method to determine presence of adequate filtration

Answer 26

Half value layer

Question 27

Taking half the maximum dosimeter reading and drawing a line from this point to the absorbed thickness

Answer 27

Filtration check (hvl)

Question 28

Hvl should be

Answer 28

> 2.3mm at 8kvp , 50mAs

Question 29

Has asignificant effect on the image contrast

Answer 29

Tube voltage

Question 30

Kvp accuracy should be

Answer 30

5%

Question 31

Directly affects thetotal quantity of radiation

Answer 31

Exposure time

Question 32

Used to regulate tube temperature

Answer 32

mA selector

Question 33

Same mAs selected but with different combination of mA and exposure time

Answer 33

Reciprocity

Question 34

Reciprocity variation

Answer 34

10%

Question 35

Raciprocity variance

Answer 35

= ((mR/mAs max - mR/mAs min) / mE/mAs ave) / 2

Question 36

Sequencial increase in mAs

Answer 36

Linearity

Question 37

Linearity variance is

Answer 37

10%

Question 38

Linearity variance =

Answer 38

(( mR/mAs max - mR/mAs min) / mR /mAs ave ) /2

Question 39

Area of the anode that is being bombarded

Answer 39

Focal spot

Question 40

Focal spot size increase w/ age

Answer 40

Blooming

Question 41

Used to evaluate blooming

Answer 41

Pinhole camera

Question 42

Responsible for regulating size of xray field

Answer 42

Beam restricting system

Question 43

BRS should be done

Answer 43

Twice a year

Question 44

How well the collimator regulates field size

Answer 44

Light field - Radiation Field Congruence

Question 45

LF Congruence within

Answer 45

2%

Question 46

Equipment with positive beam limiting device

Answer 46

Image receptor - radiation field alignment

Question 47

IR congruence

Answer 47

3%

Question 48

Collimator dials to the size of x and y

Answer 48

Accuracy of x-y scale

Question 49

Light source should be ______ at 100 cm distance

Answer 49

15 ft - c (160 lux)

Question 50

Used for evaluation of illuminator bulb brightness

Answer 50

Photometer

Question 51

Xray beam should mounted properly in metal housing

Answer 51

Beam alignmet