Imaging comparisons (A-level only) Flashcards – AQA A-level Physics (7408)

What is image resolution?

The ability to distinguish two close features as separate.

How does the minimum resolvable separation relate to spatial resolution?

A smaller minimum resolvable separation means better spatial resolution.

What three practical factors affect the convenience of an imaging technique?

Imaging speed, equipment availability and required preparation.

What determines the safety risks of an imaging procedure?

The technique and the person being imaged.

What must be weighed against the risk of exposure to ionising radiation in imaging?

The benefit of the image.

How should resolution, convenience and safety be weighed when choosing an imaging technique?

They should be weighed for the situation; the highest-resolution technique is not always the most suitable.