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Questions and Answers
What is the main purpose of using a special filter in clinical CT?
What is the main purpose of using a special filter in clinical CT?
- To reduce patient dose
- To remove long-wavelength x rays (correct)
- To increase the mean energy of the x-ray beam
- To produce uniform beam hardening
What is the thickness of the inherent filtration used in CT?
What is the thickness of the inherent filtration used in CT?
- 0.1 to 0.4 mm
- Less than 0.1 mm
- More than 3 mm
- About 3 mm Al-equivalent (correct)
What happens to the energy distribution of the radiation beam when it passes through the filter and the object?
What happens to the energy distribution of the radiation beam when it passes through the filter and the object?
- It creates beam hardening (correct)
- It decreases the mean energy of the beam
- It reduces uniformity
- It increases patient dose
Why does filtration result in the beam becoming 'harder'?
Why does filtration result in the beam becoming 'harder'?
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What is the purpose of added filtration in clinical CT?
What is the purpose of added filtration in clinical CT?
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