Which technique adjustment would most likely minimize patient exposure during a scoliosis series?

Using a PA projection instead of an AP projection is the correct choice for minimizing patient exposure during a scoliosis series. The reason this technique adjustment is effective lies in the positioning and the way radiation interacts with the body.

In a PA (posteroanterior) projection, the X-ray beam enters through the back and exits through the front of the patient, which is generally beneficial for reducing radiation exposure to the sensitive organs in the torso, such as the breast tissue in females. This positioning means that the primary radiation beam is directed away from these organs, thereby minimizing the dose they receive. Additionally, the PA projection typically results in a better image quality with less scatter radiation affecting the imaging process.

The other techniques, while they may have some impact on exposure levels, do not directly address the positioning in a way that significantly reduces dose to sensitive organs as effectively as the PA projection does.