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Questions and Answers
What is the focal spot in an X-Ray tube?
What is the focal spot in an X-Ray tube?
- The part of the tube that focuses the x-rays
- The area of the anode that receives the most heat
- The area where electrons interact with the filament
- The area of the target from which x-rays are emitted (correct)
Why are small focal spots preferred in radiology?
Why are small focal spots preferred in radiology?
- They reduce the overall radiation exposure
- They improve spatial resolution of the image (correct)
- They simplify the design of the X-ray tube
- They increase the heat capacity of the tube
What is the line-focus principle designed to achieve?
What is the line-focus principle designed to achieve?
- To enhance the efficiency of the electron beam
- To improve spatial resolution while managing heat (correct)
- To minimize the x-ray exposure to patients
- To increase the overall size of the focal spot
What does a smaller target angle in an X-ray tube do to the effective focal spot size?
What does a smaller target angle in an X-ray tube do to the effective focal spot size?
What shape is typically preferred for the effective focal spot in high-resolution imaging?
What shape is typically preferred for the effective focal spot in high-resolution imaging?
What is one potential issue caused by the line-focus principle?
What is one potential issue caused by the line-focus principle?
What shape is commonly seen in the effective focal spot due to design constraints?
What shape is commonly seen in the effective focal spot due to design constraints?
What factors primarily control the differences in x-ray intensity across the focal spot?
What factors primarily control the differences in x-ray intensity across the focal spot?
What causes the reduced intensity of x-rays emitted through the heel of the target?
What causes the reduced intensity of x-rays emitted through the heel of the target?
When positioning the cathode side of the x-ray tube, where should it be placed for chest radiography?
When positioning the cathode side of the x-ray tube, where should it be placed for chest radiography?
In abdominal imaging, where should the cathode be positioned?
In abdominal imaging, where should the cathode be positioned?
What happens to the effective focal spot size across the x-ray field?
What happens to the effective focal spot size across the x-ray field?
What type of radiation is produced when electrons land on areas outside of the focal spot?
What type of radiation is produced when electrons land on areas outside of the focal spot?
What is a consequence of off-focus radiation on image quality?
What is a consequence of off-focus radiation on image quality?
What can be done to achieve uniform radiation exposure when imaging anatomical structures of varying densities?
What can be done to achieve uniform radiation exposure when imaging anatomical structures of varying densities?
Which region in the thorax is considerably thicker and requires higher radiation intensity for uniform exposure?
Which region in the thorax is considerably thicker and requires higher radiation intensity for uniform exposure?
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