FDG uptake in normal tonsils and sublingual glands appears in sagittal images as what shape?

The uptake of Fluorodeoxyglucose (FDG) in normal tonsils and sublingual glands is typically visualized in sagittal images as an inverted C shape. This pattern is indicative of the anatomy and positioning of these structures in the body.

In the case of the tonsils, which are located on either side of the oropharynx, their FDG uptake appears as two lobulated structures that can be visualized in a way that resembles an inverted C shape when viewed in sagittal slices. The sublingual glands, located beneath the tongue, also contribute to this overall shape due to their anatomical positioning and FDG distribution.

This inverted C shape is a distinct representation that aids in identifying these normal structures in PET imaging, differentiating them from pathologies and ensuring accurate interpretation. Understanding how FDG uptake presents in normal anatomy is critical for radiologists and nuclear medicine professionals when assessing scans for potential abnormalities.