Technical Fators

Question 1

factors that influence and determine the quantity and quality of xradiation to which rhe patient is exposed

Answer 1

Exposure Factor

Question 2

refers to the radiation intensity (measure in mGya or mGya/mAs)

Answer 2

Radiation Quantity

Question 3

refers to the xray beam penetrability (best measured by the halve value layer or HVL

Answer 3

Radiation Quality

Question 4

the combination of setting selected on the control panel of the xray imaging system to produce a high qaulity image

Answer 4

Radiographic Technique

Question 5

What are the exposure factors that may influence xray quantity and quality

Answer 5

A. kilovolt peak
B. milliampere
C. exposure time
D. milliampere-second
E. distance
F. voltage ripple
G. filtration

Question 6

A-E are the four primary exposure factors they are under the control of the ______

Answer 6

Radiologic Technologist

Question 7

F-G Voltage ripple and Filtration are not or ___

Answer 7

have limited control

Question 8

are the most important and principally responsible for xray quality and quantity

Answer 8

kilovolt peak and milliampere

Question 9

primary control factor of xray beam qaulity, and therefore, of beam penetrability

Answer 9

Kilovolt Peak

Question 10

incrased the kilivolt peak

Answer 10

increase tube voltage
increase kinetic energy of electron
increase xray energy (quality)
increase xray beam penetrability

Question 11

has the most effect on image receptor exposure because it can affect both beam qaulity and qauntity

Answer 11

kVp

Question 12

quantity increased because

Answer 12

increase kVp

increase tube voltage

increase number of electrons that can leave the cathode

increase number of xray produced (quantity)

Question 13

side effect of high kVp

Answer 13

higher energy xray tend to interact more by compton effect, thus increasing scatter which reduces image contrast

Question 14

it controls screen film readiographic contrast

Answer 14

kVp

Question 15

determines the number of xray produced, and therefore, the radiation quantity

Answer 15

Milliampere

Question 16

if increased mA?

Answer 16

increase mA

increased number of electrons

increased number of xray produced (quantity)

Question 17

1A=1C/s = ??

Answer 17

6.3x10^18

Question 18

mA and number of electron are ______

Answer 18

directly proportional

Question 19

when xray quantity is doubled patient dose is ____

Answer 19

double

Question 20

a change in ____ does not change the kinetic energy of projectile electron

Answer 20

milliampere

Question 21

with a constant exposure time mA, controls the xray quantity (and the patient dose) but not xray _____

Answer 21

Quality

Question 22

the duration of exposure

Answer 22

Exposure Time

Question 23

kept as short as possible to minimize motion blur that can kccur because of patient motion

Answer 23

Exposure Time

Question 24

they can also compensate each kther depending on the situation

Answer 24

combined with mA and used as mAs

Question 25

mAs controls ____

Answer 25

OD optical density

Question 26

the blackness or darkness of a film

Answer 26

Optical Density

Question 27

the blackness or darkness of a film

Answer 27

Optical Density

Question 28

mA, exposure time, and mAs are all ______ to rafition quantity, and all of them do not affect radiation quality

Answer 28

Directly Proportional

Question 29

affects the exposure of the image receptor according to the inverse square law

Answer 29

source to inage receptor distance (SID)

Question 30

largely determine the intensity of the xray beam at the image receptor

Answer 30

source to image receptor distance (SID)

Question 31

it has no eefect on radiation quality

Answer 31

source to image receptor distance (SID)

Question 32

can be used to calculate the required change in mAs after a change in SID to maintain constant OD

Answer 32

Direct square law

Question 33

_____ results in better rafiograph, but needs to be compensated with a larger mAs

Answer 33

Longer SID