When positioning for a mediolateral oblique (MLO) projection, what is the typical angle range for average patients?

The average angle range for the mediolateral oblique (MLO) projection is typically between 40 and 50 degrees. This angle is critical for properly visualizing the breast tissue, especially the upper outer quadrant, which often contains fibroglandular tissue. The MLO projection serves to optimize the inclusion of breast tissue in the image while minimizing the amount of superimposition that can obscure diagnostic information.

Using an angle within this range allows for effective compression and provides a comprehensive view that is important for accurate diagnosis. If the angle were too shallow, it might not sufficiently capture the necessary anatomy, and an angle that is too steep could lead to distortion or insufficient imaging of the breast tissue.

Overall, the chosen angle of 40-50 degrees is based on both anatomical considerations and best practices to ensure that important structures within the breast can be adequately assessed for any abnormalities.