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GTV-T definition:CT Scan
Plukker JThM – Best Pract Res Clin Gastroenterol – 2006
TUMOR
•
Definition of
extension
based on
wall thickness:
•
common with
benign disease
(esophagitis, hypertrophy due to
obstruction, fluid/food, others)
•
Definition of
mediastinal invasion
based on
fat invasion:
•
frequently
impossible to distinguish normal fat planes
for mid-
esophageal area; underweights patients; GEJ loss of esophageal fat
•
Definition of tumor volume in the lower part hampered by
motion artifacts
(heart),
paucity of fat