What position is typically used for imaging the sternum, and what exposure settings are likely employed?

What position is typically used for imaging the sternum, and what exposure settings are likely employed?

• A. AP Position with high mA
• B. RAO Position with low mA and lengthened exposure time
• C. Lateral Position with short exposure time
• D. PA Position with variable mA

Answer: (B)

The RAO (Right Anterior Oblique) position is commonly used for imaging the sternum because it allows for a clear view of the sternum without superimposition from the surrounding structures, such as the heart or lungs. This oblique angle improves the visualization of the sternum, providing optimal detail needed for diagnosis.

Using low mA (milliampere) settings along with a lengthened exposure time in this position helps to mitigate motion blur, which is particularly important since the sternum's anatomy may be obscured by surrounding soft tissues. The increased time allows for better image quality while keeping radiation dose levels manageable. Such exposure settings are effective in producing a detailed image of the sternum while maintaining clarity.

Other positions or settings may not offer the same advantages in visualizing the sternum effectively due to factors like superimposition or motion blur, which can compromise the quality of the image obtained.