1803 / 1840
TARGET DEFINITION
Findings from esophagoscopy, barium swallow
computed tomography
Documentation (radiograph) of tumour extension
during application with anatomical landmarks
GTV
:
Depth: tumor thickness
thickness of esophageal wall
Length: Tumor length
CTV
:
safety margin for subclinical disease: CTL
PTV
:
safety margin for uncertainties: PTL