Radiology Basics Flashcards
What are the Roentgen signs?
size, shape, number, opacity, location/position, margins/contour
What is missing from this radiograph?
the lungs
What is radiographic opacity?
the degree of object whiteness or blackness
Radiopaque
Brigter, relative whiteness
Radiolucent
darker, relative blackness
What are the five basic radiographic opacities?
air, fat, fluid, bone, metal
What opacity is number 1?
air
What opacity is number 2?
fat
What opacity is number 3?
fluid
What opacity is number 4?
bone
What opacity is number 5?
metal
What is the opacity of a structure affected by?
adjacent/surrounding opacity
What is border effacement?
a lack of contrast between structures that are in contact and have the same radiographic opacity causes the loss of the margin/outline
What is summation?
additive absorption of x-Ray bean by objects that are not in contact
What is a good example of summation?
the kidneys in lateral views
What is distortion?
unequal magnification
What is this radiograph an example of?
a type I physeal fracture
What do you name a radiographic view based on?
the point of the beam enterance to the point of exit
What is this view?
extended leg ventrodorsal view
What is this view?
craniocaudal
What is this view?
caudocranial
On all lateral views, what should always point to the left?
the animals nose
For all dorsoventral or ventrodorsal views, where should the right side of the animal always be?
on the viewers left side
What view is this?
dorsoventral
What view is this?
ventrodorsal
Explain the process of MRIs imaging.
the magnetic field is used to align hydrogen protons in the body, the radio frequency waces are absorbed by the bodys protons and then emitted as a signal, a radio frequency coil picks up the signal and transmits it to a computer, the computer processes it
