There are degrees to density? T/F
T: can be lighter and darker
What is contrast?
Difference in the degrees of blackness/whiteness between adjacent areas on a radiograph
What are the 3 objectives of geometric characteristics?
What is: Sharpness, magnification, and distortion.
What is radiopaque?
The white or light portion
Is this image high or low contrast?
High contrast
What are the 3 factors that influence sharpness?
What is: Focal spot, film composition, and movement.
What is radiolucency?
low contrast
According to the book, which PID is preferred to limit magnification? Longer PID or a shorter PID
Longer PID
What is an uncontrollable variable for density?
the thickness of the patient
What is the kV and contrast for short scale contrast?
Low kV and High contrast
What are the two influencing factors that affect distortion?
Object film and x-ray beam angulation
What are the three exposure factors?
1: kV
2: mA
3: exposure time
What is the kV and contrast for long scale contrast?
High kV and low contrast
How does crystal size influence sharpness?
What is: Bigger crystal size = less sharpness & Smaller crystal size = More sharpness.