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Published on: April 11, 2018
A Radiation Therapy Contouring Atlas for Cardiac Conduction Node Delineation
Pierre Loap1, Vincent Servois1, Gilles Dhonneur1
1Institut Curie, Paris, France.
Purpose:
The heart is a complex organ at risk. Currently, radiation therapy cardiac delineation atlases do not include conduction system substructures, which exposure may clinically translate into arrhythmia and conduction disorders. We present a method to reproducibly delineate conduction nodes on noncontrast simulation computed tomography scans.
Methods And Materials:
Localization and dimensioning of the sinoatrial and atrioventricular nodes volumes on noncontrast simulation computed tomography scans were proposed based on radio-anatomic and histologic considerations and agreed upon by a multidisciplinary staff.
Results:
The proposed atlas enables the dosimetric evaluation of the sinoatrial and atrioventricular nodes exposure, and both contours correspond to 2-cm diameter spheres.
Conclusions:
This delineation atlas should facilitate the delineation of cardiac conduction nodes in clinical research and daily practice.
