Intro to radiology and radiography Flashcards
1
Q
What is a radiograph
A
An image produced by the transmission of x-rays through an object
2
Q
What is radiography
A
The techniques involved in producing radiographic images
3
Q
What is radiology
A
The interpretation of medical imaging
4
Q
What is radiation protection
A
The protection of patients and staff from the harmful effects of ionising radiation
5
Q
Explain how x-rays work
A
- Pass through the body to reach the image detector causing blackening of the image
- It is created by different absorption of x-ray photons by different tissues, leading to a two-dimensional image of a 3D object
6
Q
Describe radiopaque areas in the radiographic image
A
- White
- Represent dense structures which have attenuated the x-ray beam
7
Q
Describe radiolucent areas in the radiographic image
A
- Black
- Areas where the x-ray beam has passed through the
object
8
Q
What is the density of a radiograph affected by
A
- Type of material
- Thickness of material
- Shape of the object
- Intensity of the x-ray beam
- Position of the object relative to the x-ray beam and receptor
- Sensitivity and type of the image receptor
9
Q
What are the limitations of viewing a 2D image of a 3D object
A
The overall shape of the object must be viewed from several different positions
