What is an example of a radiographic study using natural shielding to decrease radiation to the ovaries?

The correct answer identifies a radiographic study designed to minimize radiation exposure to the ovaries through the use of natural shielding. In this case, the PA lumbar spine position is advantageous because it allows the x-ray beam to enter the body from the posterior (back) side toward the anterior (front) side. The ovaries are positioned deep in the pelvic cavity, and by angling the x-ray beam in a posterior-anterior direction, the natural shielding provided by the pelvic structures can help to reduce the amount of radiation exposure that reaches the ovaries.

In contrast, other positions such as the AP (anterior-posterior) pelvis or the lateral femur do not provide the same level of natural protection for the ovaries. The AP pelvis would directly expose the ovaries to the radiation, increasing the potential risk. The lateral femur would not align the radiation exposure in a way that effectively utilizes the natural anatomy to shield the ovaries. Thus, the PA lumbar spine is the optimal choice for minimizing ovarian exposure during radiographic studies.