A, Contrast-enhanced CT scans obtained with protocol C, B, and A (from left to right) in different patients with papillary thyroid cancer. A, Contrast-enhanced.

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Presentation transcript:

A, Contrast-enhanced CT scans obtained with protocol C, B, and A (from left to right) in different patients with papillary thyroid cancer. A, Contrast-enhanced CT scans obtained with protocol C, B, and A (from left to right) in different patients with papillary thyroid cancer. Note the enhancing metastatic lymph node in the right level III. B, A hyperenhancing lymph node in the right level III is shown in protocol C. The ROI (ROI area, 23.8 mm2; mean tissue attenuation, 172 HU) is drawn for a labeled metastatic lymph node. For normalization, a 60-mm2 circular ROI was drawn on the ipsilateral CCA (mean CT value, 389 HU), IJV (mean CT value, 370 HU), and paraspinal muscle (mean CT value, 71.5 HU) on the same image. Lymph node tissue attenuation normalized to CCA, IJV, and paraspinal muscle was 0.44, 0.46, and 2.4, respectively. J.E. Park et al. AJNR Am J Neuroradiol 2017;38:782-788 ©2017 by American Society of Neuroradiology