FIG 2. Patient 16, an 83-year-old woman with newly diagnosed squamous cell carcinoma of the lateral tongue.

A, Axial view fast spoiled gradient recalled image (10.4/2.3; flip angle, 30 degrees), obtained during bolus administration of contrast agent, shows a normal appearing left level IIA lymph node (arrow). SMG, submandibular gland.

B, Same image as that shown in A, magnified to emphasize the area of interest and with a region of interest indicator placed over the level IIA node. Pathologic analysis showed that this lymph node was not a tumor-involved node.

C, Plot of signal intensity versus time generated from the region of interest placed around the cervical lymph node shown in B. Derivation of peak time, peak enhancement, maximum up-slope, and washout slope are illustrated.