Question

Which of the following groups of exposure factors would be most effective in eliminating prominent pulmonary vascular markings in the RAO position of the sternum?

1. 500 mA, 1/30 s, 70 kV 2. 200 mA, 0.04 second, 80 kV 3. 300 mA, 1/10 s, 80 kV
4. 25 mA, 7/10 s, 70 kV
Answer: 25 mA, 7/10 s, 70 kV

Answer 1

To eliminate prominent pulmonary vascular markings in the RAO position of the sternum, using 25 mA, 7/10 s, 70 kV as the exposure factors would be most effective.

Step-by-step explanation:

In order to eliminate prominent pulmonary vascular markings in the RAO position of the sternum, the most effective group of exposure factors would be 25 mA, 7/10 s, 70 kV.

By using a lower milliamperage (mA) and longer exposure time, the amount of radiation reaching the chest is reduced. Additionally, a lower kilovoltage (kV) helps to further reduce the visibility of the vascular markings.

Therefore, by choosing a combination of lower mA, longer exposure time, and lower kV, the prominent pulmonary vascular markings can be effectively eliminated.