CAMRT Radiography Practice Exam

What is the optimal kVp range for abdominal radiography?

1. 55 - 65 kVp

2. 65 - 75 kVp

3. 75 - 85 kVp

4. 85 - 95 kVp

The correct answer is: 65 - 75 kVp

The optimal kVp range for abdominal radiography is 65 to 75 kVp. This range is ideal because it provides a balance between adequate penetration of the abdominal structures and sufficient contrast. In abdominal imaging, the various tissues such as fat, organs, and fluid levels need to be differentiated; therefore, the selected kVp must be high enough to penetrate denser structures while also maintaining good image contrast. Using a kVp within this range ensures that softer tissues like the liver and spleen are adequately visualized alongside denser materials, which is crucial for accurate diagnosis. Choosing a kVp that is too low would result in an image that lacks penetration, leading to poor visibility of the organs, while a kVp that is excessively high might result in excessive penetration, reducing contrast and making it difficult to distinguish between different soft tissues. Hence, the 65 to 75 kVp range effectively satisfies the requirements for achieving good diagnostic quality in abdominal radiography.