Which statement best describes a high kVp, low mAs technique in abdominal radiography?

Which statement best describes a high kVp, low mAs technique in abdominal radiography?

• A. It increases patient dose and improves image contrast
• B. It decreases patient dose and decreases image contrast
• C. It decreases patient dose and increases image contrast
• D. It increases patient dose and reduces resolution

Answer: (B)

High kVp increases beam energy, which makes tissues more uniformly attenuated and raises scatter. That reduces subject contrast, so the image looks greyer and less differentiated. Meanwhile, lowering mAs reduces the number of photons reaching the detector, which directly lowers the patient’s radiation dose. So using a high kVp with low mAs achieves a smaller dose while sacrificing image contrast. In abdominal exams, this trade-off is often acceptable because the thicker body part benefits from better penetration, and the resulting image dose can be kept lower even though the contrast is diminished.

High kVp increases beam energy, which makes tissues more uniformly attenuated and raises scatter. That reduces subject contrast, so the image looks greyer and less differentiated. Meanwhile, lowering mAs reduces the number of photons reaching the detector, which directly lowers the patient’s radiation dose. So using a high kVp with low mAs achieves a smaller dose while sacrificing image contrast. In abdominal exams, this trade-off is often acceptable because the thicker body part benefits from better penetration, and the resulting image dose can be kept lower even though the contrast is diminished.