PET scanning (Edexcel GCSE Physics Combined Science): Quizzes
📚Quizzes
Practise the questions
11 questions from this quiz
ShowHide
Practise the questions
11 questions from this quiz
What does PET stand for in PET scanning?
What does PET stand for in PET scanning?
Positron Emission Tomography
What does PET scanning show in the body?
What does PET scanning show in the body?
Areas of high metabolic activity
Why do cancer cells show up clearly on PET scans?
Why do cancer cells show up clearly on PET scans?
They have higher metabolism
What is injected into the patient during PET scanning?
What is injected into the patient during PET scanning?
Radioactive substance containing a tracer
Where does the tracer collect in the body?
Where does the tracer collect in the body?
Areas with high metabolism
What happens when a positron meets an electron?
What happens when a positron meets an electron?
They annihilate each other
What is released when a positron and electron annihilate?
What is released when a positron and electron annihilate?
Gamma rays in opposite directions
How many pairs of gamma rays are needed to pinpoint a tumour's location?
How many pairs of gamma rays are needed to pinpoint a tumour's location?
At least 3 pairs
What is the method called that pinpoints the tumour location?
What is the method called that pinpoints the tumour location?
Triangulation
Why are short half-life isotopes used in PET scans?
Why are short half-life isotopes used in PET scans?
They decay quickly and don't stay long
What does a cyclotron do in a hospital?
What does a cyclotron do in a hospital?
Makes isotopes on-site