Filter And Grid
Write a short note on filter and the grid.
Answer:
Filter
- The filter in the X-ray machine removes the unwanted radiation, leaving the wanted radiation undiminished.
- Aluminum filters are the most commonly used filters in X-ray machines.
“Importance of studying filters and grids for better diagnostic accuracy: Questions explained”
Ideal Requirements of Filter Material
- It should discriminate against the lower energy photos.
- Material should not consist of an absorption edge at energies close to the energies of photons that are desired to be used.
- The thickness of the material should not be very small because, in such cases, due to irregularity in thickness, the beam produced should be non-uniform. Pin holes occur easily without producing tiny, completely unfiltered, and unacceptable beams.
“Understanding the role of filters and grids in improving X-ray image quality: Q&A explained”
Filter Materials
Following are the materials used:
- Aluminum from 30 KV to 120 KV
- Copper till 100 KV to 250 KV
- Tin till 200 KV to 600 KV
- Lead till 600 KV to 2 mV.
“Common challenges in using filters and grids effectively: FAQs provided”
Filter Types
Profile Wedge Filter
- Reducing the radiographic density of soft tissue profile can be accomplished by absorbing and removing some of the X-rays from the part of the X-ray beam reaching the profile soft tissue.
- The absorbing device is a profile wedge filter, which has a vertical bar that is wedge-shaped.
Wedge Filters
Used with megavoltage radiations as well as in radiotherapy when it is desired to treat one side of the patient only.
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