CAMRT Radiography Practice Exam

What is the purpose of using bowtie filters in CT scans?

1. Increase patient exposure

2. Ensure correct patient centering and reduce dose

3. Increase kilovoltage

4. Shape the intensity of the primary beam

The correct answer is: Shape the intensity of the primary beam

The purpose of using bowtie filters in CT scans aligns with shaping the intensity of the primary beam. Bowtie filters are designed to modify the x-ray beam profile in such a way that it compensates for the varying thicknesses of the patient's anatomy. By using a tapered filter, the beam intensity is reduced in areas where it's not needed, such as in the thinner parts of the body. This adjustment helps ensure that the radiation dose is more evenly distributed across the area being imaged, optimizing the dose while maintaining image quality. The application of bowtie filters plays a significant role in enhancing patient safety and image quality. By shaping the beam, these filters minimize unnecessary radiation exposure to the patient and enhance contrast and detail in the resulting images, crucial for accurate diagnoses. Therefore, the correct answer reflects the primary purpose of bowtie filters in CT technology.