Intro Lecture Flashcards
A joint spaces or ancillary spaces refers to what aspect of image interpretation?
Cartilage
Bone spurs reps what?
degeneration of disc
Calcification adds ___ to the plain film.
density
The plain film x-ray is very specific form to view or identify bone tumors. True or False
True. In most cases its all that’s needed.
How many views is considered a complex exam?
two views, A-P and Lateral
Name Bone characteristics (imaging find) that can be seen on plain film.
legion Longer than it is wide
ground glass matrix mineralization
well defined margination w/thin sclerotic
An ex of Fiberous dysplasia
Name Bone characteristics (imaging find) that can be seen on plain film.
Flocculent small arcs and small rings = presence of cartilage (more Lucent) thin cortex ballooning of bone An ex of Enchondroma
Conventional Tomography is not used anymore but has been replaced by what 2 types of imaging?
CT (computed tomography) or MRI
What determines the tomographic arc on conventional tomography?
slice thickness, the longer the arc the thinner the slice
Tomography is going to have blurs above and below target area allowing one to clearly see what?
fx, bone lesions
Computed tomography aka is
CT or CAT scan
What is the purpose of CT/CAT scan?
makes Stacks of images (deck of cards) per single exam.
What form of examination is used to obtain imaging in the axial plane? Why?
CT computed Tomography
- provides excellent spatial relationships
- show 3D multiplanar
- based on Tissue attenuation by ionizing radiation
What is the lowest attention or lowest density on film?
Air
Name the CT components.
scanning gantry (tube + sensors/detectors)
table slides in/out
x-ray generator
data processing unit
The tube of CT is the same as what other type of imaging?
x-ray/plain film
The CT tube rotates within the gantry while the table translates ___ thus creating a “spiral” path through the patient
linearly
Slice thickness should be ___ or less. The thinner the slice the better view.
~5 mm
A single CT exam contains many slices and can be manipulated to create various what?
windows
If a pt has fx on plain film x-ray what is the next step and why?
CT b/c it shows spacial relationships of anatomy
What is the go to for spinal cord and soft tissue eval?
MRI
CT looks just like what other type of imaging? Tip, check the cortex to tell the difference between the two.
x-ray
if you can see a radiolucent points on the film then its likely to be a CT instead of x-ray
Concerning CT, the purpose of the scout image is to
show the location in the body where the stack of images were obtained
“Taking an x-ray” would result in the production of a(n):
Radiograph
