Abstracts

RETURN TO ABSTRACT LISTING


E1785. The Nuclear Radiologist's GPS of the Neck: Lymph Nodes, Spaces, and Anatomical Land Marks by PET/CT and Multiple Imaging Modalities
Authors
  1. Raya Jadaan; King Hussein Cancer Center
  2. Thomas Anderson; University of Illinois at Chicago
  3. Nael Khayyat; University of Illinois at Chicago
Background
FDG PET/CT reading in H&N can be quite challenging due to the lack of anatomic landmarks by PET and the variable physiologic variation of FDG uptake. There is a considerable physiologic variation of FDG uptake that can be visualized before and after treatment.

Educational Goals / Teaching Points
After viewing the exhibition, PET/CT interpreters should be able to recognize anatomical landmarks of the Head and Neck during PET/CT interpretation with the correlation of MRI and CT scans, recognize normal versus abnormal patterns of FDG uptake, recognize treatment changes and artifacts. The reader also should recognize the regional lymph nodes classification as it is essential in staging and restaging.

Key Anatomic/Physiologic Issues and Imaging Findings/Techniques
PET/CT images are presented to provide examples of variable regional lymph nodes and spaces. Examples of benign activity and artifacts are included with correlation to the anatomical landmarks, such as lymphoid tissue (tonsils and adenoids), salivary glands, soft palate, tongue, hard palate, alveolar ridge, retromolar trigon, brown fat, muscle activity. Examples of how to recognize landmarks and borders of the surgical neck lymph nodes levels are included as well.

Conclusion
FDG PET/CT reading in H&N can be quite challenging due to the lack of anatomic landmarks by PET and the variable physiologic variation of FDG uptake. After viewing the exhibition, PET/CT interpreters should be able to recognize anatomical landmarks of the Head and Neck during PET/CT interpretation with the correlation of MRI and CT scans, recognize normal versus abnormal patterns of FDG uptake, recognize treatment changes and artifacts. The reader also should recognize the regional lymph nodes classification as it is essential in staging and restaging.