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BT-GYN Teaching Course
D. Berger
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With intracavitary brachytherapy a very heterogenous dose is applied to
target and organs at risk
(steep dose gradient)
•
significant change in dose within a few millimeters
Variation of dose along the lateral axis of
EBRT (full line) vs. intracavitary BT (dotted line)
taken from ICRU Report 38
Standard dose distribution with a
tandem-ring applicator
taken from GEC ESTRO Handbook of Brachytherapy
target
target at level of point A
Volume Effect of Intracavitary Brachytherapy