Which of the following best describes fatty tissue on a mammogram?

Fatty tissue on a mammogram is best described as radiolucent and low density. This characteristic is due to the fact that fatty tissue allows more x-rays to pass through compared to denser tissues like glandular or fibrous tissues, resulting in a dark appearance on the mammogram. The radiolucency signifies its ability to transmit radiation, making the fatty areas appear less prominent and more transparent compared to other types of tissue.

In contrast, denser tissues absorb more radiation, which makes them appear lighter and more opaque on a mammogram. This understanding is essential for radiologists in differentiating various types of breast tissue. Recognizing the properties of fatty tissue is crucial for accurately interpreting mammograms, particularly when assessing for abnormalities.