Image Acquisition

filtration affects:

SID affects:

focal spot size:

grids affect:

OID affect:

angle of tube/part/receptor affects:

kVp affect:

beam restriction (collimation):

40in (100cm)

36in SID, 12 mAs, 12:1 grid

0.25mm, 1.6mm by 0.10mm

32 mAs 100 cm

10 mAs at 72" SID

110kVp, 4mAs

100mA, 0.020 sec, 80kV, 200-speed screen

500mA, 0.03 sec, 70kV, 8:1 grid

100 lead strips per inch 0.30mm thick 4mm high

400mA, 70ms, & 78kV

75kVp & 25mAs

200mA, 60ms, 36-in SID

80" SID, 30" OID

200mA, 0.25 sec, 65kVp

72mAs

blurring caused by motion

grid cutoff due to off-centering would result in:

intensifying screens effects

advantage air gap technique

15% rule

interspaces of a grid

off center grid cut off

low ratio grid, high ratio grid

relationship between SID and density

PA chest

grid cut off means

contrast can measure from a characteristic curve by finding tangent

which of the following has a direct impact on size distortion on radiography

image on radiographic film after exposure but before development is known as

a larger matrix

which of the following has no impact on radiation exposure to patient

object is place halfway

brightness & contrast resolution in digital imaging can be influenced by

exposure without screens divided by exposure with screen

possesses widest dynamic range

image contrast is a result of

has no impact on radiation exposure to patient

modern rare earth intensifying screen are used  primarily to

lateral lumbar asthenic patient

recorded detail can be improved by decreasing

grid employed

low contrast

primary controlling factor of density is

digital imaging, size of image matrix increase

table bucky device

15% rule, kVp increase by 15%

as beam restriction increases (becomes tighter):

anatomic structures are on top of each other

what is the cause of "pi line" artifact on radigraph

CR & DR include

off distance grid cut-off is characterized by

AP T-spine

what are the effects of scattered radiation on a radiographic image:

help compensate for varying densities of anatomic structures

line-focus principle expresses the relation between

storage x-ray film

histogram is used automatically rescale the image to the proper brightness

mAs directly controls

an increase in kV will serve to

how well an imaging system reproduces the sharpness of actual object is referred to as what

which of the following contrast media, when added body, decreases the tissue density of the body part

which of the following main determinant in selecting a focal spot size

S-number of 50/S-number of 200

essential assurance program is called a:

which of the following is NOT considered one of the geometric factors that control recorded detail/spatial resolution

emulsion scratches that run the length of film in the direction of the film travel are usually caused by

when mA is increases

which of the following defines radiographic density

which of the following is (are) associated with the subject contrast

film screen system effect on recorded detail is controlled by

to effectively take advantage of anode heel effect, where should the thicker part of anatomy be placed

factors that determine the production of scatter radiation include:

distortion may be described as:

recorded detail is:

portion of contrast that is caused by variations in anatomy or is secondary to pathologic changes is called

absorption of useful radiation by a grid is called

which of the following statements about histograms is/are true

during CR imaging, the latent image present on the PSP is changed to a computerized image by

factors that can affect histogram appearance include

purpose of electroconductive layer of a CR PSP plate is to

decrease in mAs by 30%

which of the following will reduce magnification

examples of healthcare informatics include

number of grid lines per inch or centimeter defines:

what type of distortion results from increase in OID

a grid usually is employed in which of the following circumstances

insufficient radiographic density

which of the following does mAs affect

what is the main purpose of using line focus principle in an x-ray tube

which of the following would tell the radiographer what new mAs to use when the SID changes to maintain film density

main differences between direct capture and indirect capture DR is that

difference in densities on radiograph describes:

how much must the mAs be increased before a noticeable change in density can be seen

device used to test resolution of film screen imaging is a

which of the following describes the relationship between SID and density

because of anode heel effect, intensity of x-ray beam is greatest along the

50% less

reduce kVp by 15%

with a reduction in field size and all other technical factors remaining unchanged, the radiographic scale of contrast will

what is the primary factor that controls quantity of x-ray photons being created at the target

which of the following is a result of anode heel effect

what effect does excessive developer temp, have on a finished radiograph

what is a major benefit of a fixed kVp technique chart

in digital imaging, as size of image matrix increases

for the same FOV, the matrix size increases

no practical amount of mAs can ever compensate for

when using a fixed kVp technical factors should be adjusted for variations in part thickness

demonstrating a long scale of contrast

what does the CR reader use to release the energy stored in the image plate