Radiology 2. X-Ray Production

Question 1

what are the main components of an x-ray unit

Answer 1

tubehead (with x-ray tube)
collimator (narrows the xray beams out of the unit)
positioning arm
control panel
circuitry (electrical circuit)

Question 2

what is the penumbra effect?

Answer 2

blurring of radiographic image due to focal spot not being a single point (but rather a small area)

[this can be minimised by shrinking size of focal spot]
[appears on x-ray as almost double shadow/vision]