Intro To Radiology Flashcards
1
Q
Which diagnostic tests do NOT use ionizing radiation?
A
MRI & ultrasound
2
Q
Lucency vs opacity?
A
Lucency: structures that let most photons through (dark)
Opacity: opposite (light)
*for plain radiographs
Therefore, white=dense grey=less dense black=least dense (air)
3
Q
Difference between fluoroscopy and radiographs?
A
Fluoroscopy is in real time- for GI, interventional purposes and blood vessels. Can also visualize soft tissues structures
4
Q
What does computed tomography (CT) measure?
A
Density
Less dense structures: darker
More dense: lighter
*good at seeing bone and soft tissue
5
Q
What is a con of radiographs/x-rays?
A
Not good for seeing soft tissues
*good for seeing bone (dense), cheap, readily available, first choice
