Head and neck lymph node region delineation with image registration.
BACKGROUND
The success of radiation therapy depends critically on accurately delineating the target volume, which is the region of known or suspected disease in a patient. Methods that can compute a contour set defining a target volume on a set of patient images will contribute greatly to the success of radiation therapy and dramatically reduce the workload of radiation oncologists, who currently draw the target by hand on the images using simple computer drawing tools. The most challenging part of this process is to estimate where there is microscopic spread of disease.


METHODS
Given a set of reference CT images with "gold standard" lymph node regions drawn by the experts, we are proposing an image registration based method that could automatically contour the cervical lymph code levels for patients receiving radiation therapy. We are also proposing a method that could help us identify the reference models which could potentially produce the best results.


RESULTS
The computer generated lymph node regions are evaluated quantitatively and qualitatively.


CONCLUSIONS
Although not conforming to clinical criteria, the results suggest the technique has promise.
Teng
Chia-Chi
CC
School of Technology, Brigham Young University, Provo, UT, USA. ccteng@byu.edu
Shapiro
Linda G
LG
Kalet
Ira J
IJ
D006258:Head and Neck Neoplasms / Q000000981:diagnostic imaging* / Q000532:radiotherapy; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008198:Lymph Nodes / Q000000981:diagnostic imaging*; D011786:Quality Control; D012015:Reference Standards; D014057:Tomography, X-Ray Computed / Q000592:standards