CAMRT Radiography Practice Exam

Why should scoliosis images be performed in a PA position?

1. To increase image clarity

2. To reduce radiation exposure to selected radiosensitive organs

3. To enhance the visibility of the spine

4. To minimize patient discomfort

The correct answer is: To reduce radiation exposure to selected radiosensitive organs

Performing scoliosis images in a posteroanterior (PA) position primarily aims to reduce radiation exposure to selected radiosensitive organs, such as the gonads and breast tissue. When patients are positioned with their backs towards the X-ray tube, the X-ray beam enters from the posterior aspect and exits through the anterior, minimizing the amount of radiation that passes through sensitive organs located anteriorly in the body. This positioning is particularly important for populations that may be exposed to repeated imaging, such as children, who are more susceptible to the effects of radiation. By prioritizing a technique that reduces exposure to these sensitive areas, radiographers can ensure that the diagnostic benefits of the imaging study are achieved without unnecessary risk to the patient's health. The other aspects, such as image clarity, visibility of the spine, and patient comfort, while important considerations in imaging, do not hold the same level of significance as radiation safety in this context. The PA position is specifically chosen to balance effective imaging with the paramount goal of minimizing radiation risk, especially in populations that might be more sensitive to these exposures.