Unit 2 Flashcards
What are the 3 primary factors you control at the control panel?
kVp
mA
Exposure time
We want our OID to be as _____ as possible
small
the CR is always centered to the ___
IR
SID is the ….
(sourse to image distance) distance from the xray tube to the IR
Longer SID reduces _______ and increases _______ _______
magnification, recorded detail
____ inches is traditionally used on most exams
40
____ inches is used on exams with increased OID to reduce magnification
72
Object to Image distance (OID) is…
how far the body part is from the IR
Umbra
sharpness
Penumbra
Unsharpness
Density
the overall blackness of a film
Radiolucent
Appears black (thinner tissues)
Radiopaque
Appears white (thicker tissues)
mAs is..
(mA) * seconds
kVp
measure of electric potential
Short scale contrast
high contrast
Decreasing kVp produces _______ contrast
higher
higher contrast = more ____________
black & white
recorded detail
sharpness
the mahor controlling factor of sharpness is:
focal spot size
distortion
misrepresentation of the true size or shape of a structure
What are the 3 types of motion?
Involuntary
Voluntary
Equipment
Primary control for Involuntary Motion is:
use as short of exposure time as possible
Primary control factor for Voluntary Motion is:
giving clear instructions
Radiographs are usually viewed in _______ ______
anatomic position
On digital, brightness is the equivalent of _______
density
On digital, grayscale is the equivalent of _______
contrast
On digital, spatial resolution is the equivalent of _______
detail
Primary controlling factor of spatial resolution
pixels
Deterioration of image be unwanted interference in x-ray signal detection
image noise
