Radiology Practice Test

What is the purpose of the aluminum filter?

1. To reduce film sensitivity

2. To magnify the image

3. To filter out low and long energy rays

4. To increase radiation dose

The correct answer is: To filter out low and long energy rays

The purpose of the aluminum filter in radiology is to filter out low and long energy rays. This helps improve the quality of the image produced by allowing only higher energy X-rays to penetrate the patient and interact with the film or detector. By filtering out the low-energy X-rays, the image produced is sharper with better contrast, which is essential for accurate diagnosis in radiology. Options A, B, and D are not correct because reducing film sensitivity, magnifying the image, and increasing radiation dose are not the primary purposes of the aluminum filter in radiology.