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IMRT Intensity Modulated RT
Simultaneous integrated boost SIB
Increase dose allowed because of IMRT
Step and shoot with integrated boost, nodes to
55Gy, Prostate to 74 Gy
Dose escalation
ESTRO physics course 2017
9
4.1
3. 626
5. 877
%95
CI
Note CI not a “fair”
comparison
as dose is
95% of the lymph nodes,
ie 70% of boost dose
IMRT – Why?
Intensity-modulated radiation therapy is a technique
that allow
confinement
of the
high dose region
to
that of the
target volume
.
ESTRO physics course 2017
10
• IMRT is a
further development
of
conformal RT.
• IMRT can conform to complex and in
particular
concave target
volumes.
• IMRT can
avoid normal tissue
.
• IMRT can
improve dose homogeneity.
• IMRT can facilitate
Simultaneous
integrated boost
(SIB).