CAMRT Radiography Practice Exam

What is the optimal kVp range used in mammography?

1. 20 - 25 kVp

2. 23 - 28 kVp

3. 30 - 35 kVp

4. 28 - 32 kVp

The correct answer is: 23 - 28 kVp

The optimal kVp range used in mammography is focused on maximizing the contrast of breast tissue while minimizing the radiation dose to the patient. The range of 23 to 28 kVp is ideal as it effectively penetrates the different densities of breast tissue, particularly fibro-glandular and adipose tissues. Using this specific range helps to ensure that the X-rays can differentiate between various types of tissue, which is crucial for detecting abnormalities in mammograms. Lower kVp values may not provide enough penetration power, leading to a higher radiation dose being required to achieve adequate imaging quality. Conversely, higher kVp values can reduce contrast, making it difficult to identify subtle lesions. Therefore, the chosen range strikes a balance that optimally enhances image quality while keeping patient safety a priority through reduced exposure. In summary, the 23 to 28 kVp range is specifically designed for the unique requirements of mammographic imaging, contributing to better diagnostic outcomes.