Radiology Flashcards
1
Q
Xrays discovered by ____ in ____
A
Roentgen, 1895
2
Q
Xray principles fixed or moving source? curved or straight beam? moving or fixed receptor? length of exposure? how the image is created
A
- fixed source
- straight “xray beam”
- fixed receptor
- momentary exposure
- image = blocked xrays
3
Q
Interactions of xray waves
A
- reflection
- refraction
- absorption
- scatter
4
Q
blocked xrays = ____
A
brighter image = RADIOPAQUE
5
Q
fewer xrays blocked =
A
RADIOLUCENT
6
Q
systemic approach to reading scans
A
- identify right patient, image, quality of image
- describe what you see
- understand what causes it to look the way it does
- THEN consider what the cause may be
- use all clinical information available to make diagnosis
7
Q
assess adequacy
A
- rotation @ clavicles
- inspiration = 9-10 posterior ribs
- exposure [interspaces & vertebral bodies]
8
Q
Rotation to left
A
MORE space @ left clavicle
9
Q
Mediastinum xray assessment structures (8)
not CV
A
- trachea
- carina
- L mainstem bronchus
- R mainstem bronchus
- Spinous process
- Head of clavicle
- Intervertebral space
- Cardiophrenic angle
10
Q
Mediastinum xray assessment structures
CV/vasculature (9)
A
a. R brachiocephalic v
b. ascending aorta / svc
c. R atrium
d. IVC
e. L brachiocephalic v / L subclavian a
f. aortic arch
g. main pulmonary a
h. L atrial apendage
i. L ventricle
11
Q
Pros of xray (5)
A
fast abundant portable cheap lowest radiation
12
Q
cons of xray (3)
A
- interpreting shadows
- signs not facts
- still some radiation
13
Q
fluoroscopy = ______
A
continuous xrays
14
Q
fluoroscopy pros
A
- real time imaging
- can evaluate flow/function
- can guide procedures
15
Q
fluoroscopy cons
A
- more expensive
- non-mobile equipment
- very high radiation
